Generic Metrics

This page describes generic GridGain metrics - a new system that is designed to replace the legacy metrics system. Generic metrics provide a cleaner decoupling between metric collecting/storing and viewing/exporting. This page offers the basics of the new metrics system and explains how you can use it to monitor your cluster.

There are different types of metrics in GridGain. Each metric has a name and a return value. The return value can be a simple value like string, long, or double. Alternatively, teh value can represent a Java object. Some metrics represent Histograms.

There are different ways to export metrics - so called Metric Exporters.

Metric Registers

Metrics are grouped into categories called registers. Each register has a name. The full name of a specific metric within the register consists of the register name followed by a dot, followed by the name of the metric: <register_name>.<metric_name>. For example, the register for data storage metrics is called io.datastorage. The metric that return the storage size is called io.datastorage.StorageSize.

Metric Exporters

An exporter provides a mechanism for accessing all the available metrics.

GridGain includes the following exporters:

JMX (default)
SQL View
Log
OpenCensus

You can create a custom exporter by implementing the MetricExporterSpi interface.

If you want to enable metrics, configure one or multiple metric exporters in the node configuration. This is a node-specific configuration, which means it enables metrics only on the node where it is specified.

<bean class="org.apache.ignite.configuration.IgniteConfiguration">
    <property name="metricExporterSpi">
        <list>
            <bean class="org.apache.ignite.spi.metric.jmx.JmxMetricExporterSpi"/>
            <bean class="org.apache.ignite.spi.metric.log.LogExporterSpi"/>
            <bean class="org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi"/>
        </list>
    </property>
</bean>

IgniteConfiguration cfg = new IgniteConfiguration();
cfg.setMetricExporterSpi(new JmxMetricExporterSpi());
Ignite ignite = Ignition.start(cfg);

This API is not presently available for C#/.NET. You can use XML configuration.

This API is not presently available for C++. You can use XML configuration.

The following sections describe the exporters available in Ignite by default.

JMX

org.apache.ignite.spi.metric.jmx.JmxMetricExporterSpi exposes metrics via JMX beans.

IgniteConfiguration cfg = new IgniteConfiguration();
JmxMetricExporterSpi jmxExporter = new JmxMetricExporterSpi();
//export cache metrics only
jmxExporter.setExportFilter(mreg -> mreg.name().startsWith("cache."));
cfg.setMetricExporterSpi(jmxExporter);

This API is not presently available for C++.

SQL View

SqlViewMetricExporterSpi is enabled by default, SqlViewMetricExporterSpi exposes metrics via the SYS.METRICS view. Each metric is displayed as a single record. You can use any supported SQL tool to view the metrics:

> select name, value from SYS.METRICS where name LIKE 'cache.myCache.%';
+-----------------------------------+--------------------------------+
|                NAME               |             VALUE              |
+-----------------------------------+--------------------------------+
| cache.myCache.CacheTxRollbacks    | 0                              |
| cache.myCache.OffHeapRemovals     | 0                              |
| cache.myCache.QueryCompleted      | 0                              |
| cache.myCache.QueryFailed         | 0                              |
| cache.myCache.EstimatedRebalancingKeys | 0                         |
| cache.myCache.CacheEvictions      | 0                              |
| cache.myCache.CommitTime          | [J@2eb66498                    |
....

Log

org.apache.ignite.spi.metric.log.LogExporterSpi prints the metrics to the log file at regular intervals (1 min by default) at INFO level.

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="         http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans.xsd         http://www.springframework.org/schema/util         http://www.springframework.org/schema/util/spring-util.xsd">
    <bean class="org.apache.ignite.configuration.IgniteConfiguration">
        <property name="metricExporterSpi">
            <list>
                <bean class="org.apache.ignite.spi.metric.log.LogExporterSpi"/>
            </list>
        </property>
    </bean>
</beans>

If you use programmatic configuration, you can change the print frequency as follows:

IgniteConfiguration cfg = new IgniteConfiguration();
LogExporterSpi logExporter = new LogExporterSpi();
logExporter.setPeriod(600_000);
//export cache metrics only
logExporter.setExportFilter(mreg -> mreg.name().startsWith("cache."));
cfg.setMetricExporterSpi(logExporter);
Ignite ignite = Ignition.start(cfg);

This API is not presently available for C#/.NET. You can use XML configuration.

This API is not presently available for C++. You can use XML configuration.

OpenCensus

org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi adds integration with the OpenCensus library.

To use the OpenCensus exporter:

Enable the 'ignite-opencensus' module.
Add org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi to the list of exporters in the node configuration.
Configure OpenCensus StatsCollector to export to a specific system. See OpenCensusMetricsExporterExample.java for an example and OpenCensus documentation for additional information.

Configuration parameters:

filter - predicate that filters metrics.
period - export period.
sendInstanceName - if enabled, a tag with the Ignite instance name is added to each metric.
sendNodeId - if enabled, a tag with the Ignite node id is added to each metric.
sendConsistentId - if enabled, a tag with the Ignite node consistent id is added to each metric.

Available Metrics

System

System metrics such as JVM or CPU metrics.

Name	Type	Description
CpuLoad	double	CPU load.
CurrentThreadCpuTime	long	ThreadMXBean.getCurrentThreadCpuTime()
CurrentThreadUserTime	long	ThreadMXBean.getCurrentThreadUserTime()
DaemonThreadCount	integer	ThreadMXBean.getDaemonThreadCount()
GcCpuLoad	double	GC CPU load.
PeakThreadCount	integer	ThreadMXBean.getPeakThreadCount
SystemLoadAverage	java.lang.Double	OperatingSystemMXBean.getSystemLoadAverage()
ThreadCount	integer	ThreadMXBean.getThreadCount
TotalExecutedTasks	long	Total executed tasks.
TotalStartedThreadCount	long	ThreadMXBean.getTotalStartedThreadCount
UpTime	long	RuntimeMxBean.getUptime()
memory.heap.committed	long	MemoryUsage.getHeapMemoryUsage().getCommitted()
memory.heap.init	long	MemoryUsage.getHeapMemoryUsage().getInit()
memory.heap.used	long	MemoryUsage.getHeapMemoryUsage().getUsed()
memory.nonheap.committed	long	MemoryUsage.getNonHeapMemoryUsage().getCommitted()
memory.nonheap.init	long	MemoryUsage.getNonHeapMemoryUsage().getInit()
memory.nonheap.max	long	MemoryUsage.getNonHeapMemoryUsage().getMax()
memory.nonheap.used	long	MemoryUsage.getNonHeapMemoryUsage().getUsed()

Name

Type

Description

CpuLoad

double

CPU load.

CurrentThreadCpuTime

long

ThreadMXBean.getCurrentThreadCpuTime()

CurrentThreadUserTime

long

ThreadMXBean.getCurrentThreadUserTime()

DaemonThreadCount

integer

ThreadMXBean.getDaemonThreadCount()

GcCpuLoad

double

GC CPU load.

PeakThreadCount

integer

ThreadMXBean.getPeakThreadCount

SystemLoadAverage

java.lang.Double

OperatingSystemMXBean.getSystemLoadAverage()

ThreadCount

integer

ThreadMXBean.getThreadCount

TotalExecutedTasks

long

Total executed tasks.

TotalStartedThreadCount

long

ThreadMXBean.getTotalStartedThreadCount

UpTime

long

RuntimeMxBean.getUptime()

memory.heap.committed

long

MemoryUsage.getHeapMemoryUsage().getCommitted()

memory.heap.init

long

MemoryUsage.getHeapMemoryUsage().getInit()

memory.heap.used

long

MemoryUsage.getHeapMemoryUsage().getUsed()

memory.nonheap.committed

long

MemoryUsage.getNonHeapMemoryUsage().getCommitted()

memory.nonheap.init

long

MemoryUsage.getNonHeapMemoryUsage().getInit()

memory.nonheap.max

long

MemoryUsage.getNonHeapMemoryUsage().getMax()

memory.nonheap.used

long

MemoryUsage.getNonHeapMemoryUsage().getUsed()

Caches

Cache metrics. Register name: cache.{cache_name}.{near}

Name Type Description

Name	Type	Description
CacheEvictions	long	The total number of evictions from the cache.
CacheGets	long	The total number of gets to the cache.
CacheHits	long	The number of get requests that were satisfied by the cache.
CacheMisses	long	A miss is a get request that is not satisfied.
CachePuts	long	The total number of puts to the cache.
CacheRemovals	long	The total number of removals from the cache.
CacheTxCommits	long	Total number of transaction commits.
CacheTxRollbacks	long	Total number of transaction rollbacks.
CacheSize	long	Local cache size.
CommitTime	histogram	Commit time in nanoseconds.
CommitTimeTotal	long	The total time of commit, in nanoseconds.
EntryProcessorHits	long	The total number of invocations on keys, which exist in cache.
EntryProcessorInvokeTimeNanos	long	The total time of cache invocations for which this node is the initiator, in nanoseconds.
EntryProcessorMaxInvocationTime	long	So far, the maximum time to execute cache invokes for which this node is the initiator.
EntryProcessorMinInvocationTime	long	So far, the minimum time to execute cache invokes for which this node is the initiator.
EntryProcessorMisses	long	The total number of invocations on keys, which don’t exist in cache.
EntryProcessorPuts	long	The total number of cache invocations, caused update.
EntryProcessorReadOnlyInvocations	long	The total number of cache invocations, caused no updates.
EntryProcessorRemovals	long	The total number of cache invocations, caused removals.
EstimatedRebalancingKeys	long	Number estimated to rebalance keys.
GetAllTime	histogram	GetAll time for which this node is the initiator, in nanoseconds.
GetTime	histogram	Get time for which this node is the initiator, in nanoseconds.
GetTimeTotal	long	The total time of cache gets for which this node is the initiator, in nanoseconds.
HeapEntriesCount	long	Onheap entries count.
IndexRebuildKeysProcessed	long	The number of keys with rebuilt indexes.
IsIndexRebuildInProgress	boolean	True if index build or rebuild is in progress.
OffHeapBackupEntriesCount	long	Offheap backup entries count.
OffHeapEntriesCount	long	Offheap entries count.
OffHeapEvictions	long	The total number of evictions from the off-heap memory.
OffHeapGets	long	The total number of get requests to the off-heap memory.
OffHeapHits	long	The number of get requests that were satisfied by the off-heap memory.
OffHeapMisses	long	A miss is a get request that is not satisfied by off-heap memory.
OffHeapPrimaryEntriesCount	long	Offheap primary entries count.
OffHeapPuts	long	The total number of put requests to the off-heap memory.
OffHeapRemovals	long	The total number of removals from the off-heap memory.
PutAllTime	histogram	PutAll time for which this node is the initiator, in nanoseconds.
PutTime	histogram	Put time for which this node is the initiator, in nanoseconds.
PutTimeTotal	long	The total time of cache puts for which this node is the initiator, in nanoseconds.
QueryCompleted	long	Count of completed queries.
QueryExecuted	long	Count of executed queries.
QueryFailed	long	Count of failed queries.
QueryMaximumTime	long	Maximum query execution time.
QueryMinimalTime	long	Minimum query execution time.
QuerySumTime	long	Query summary time.
RebalanceClearingPartitionsLeft	long	Number of partitions need to be cleared before actual rebalance start.
RebalanceStartTime	long	Rebalance start time.
RebalancedKeys	long	Number of already rebalanced keys.
RebalancingBytesRate	long	Estimated rebalancing speed in bytes.
RebalancingKeysRate	long	Estimated rebalancing speed in keys.
RemoveAllTime	histogram	RemoveAll time for which this node is the initiator, in nanoseconds.
RemoveTime	histogram	Remove time for which this node is the initiator. in nanoseconds.
RemoveTimeTotal	long	The total time of cache removal, in nanoseconds.
RollbackTime	histogram	Rollback time in nanoseconds.
RollbackTimeTotal	long	The total time of rollback, in nanoseconds.
TotalRebalancedBytes	long	Number of already rebalanced bytes.
getCacheTouches	long	The total number of `touch()` requests to the cache. Equal to the sum of hits and misses.
getCacheTouchHits	long	The number of `touch()` requests that were satisfied by the cache, i.e., "hits."
getCacheTouchMisses	long	The number of `touch()` requests that were not satisfied by the cache, i.e., "misses," either because the requested key was not found in the cache or TTL value was not changed.
getCacheTouchHitPercentage	float	The percentage of cache `touch()` requests that were satisfied by the cache. Calculated as `getCacheTouchHits` divided by `getCacheTouches` multiplied by 100.
getCacheTouchMissPercentage	float	The percentage of cache `touch()` requests that were not satisfied by the cache. Calculated as `getCacheTouchMisses` divided by `getCacheTouches` multiplied by 100.

CacheEvictions

long

The total number of evictions from the cache.

CacheGets

long

The total number of gets to the cache.

CacheHits

long

The number of get requests that were satisfied by the cache.

CacheMisses

long

A miss is a get request that is not satisfied.

CachePuts

long

The total number of puts to the cache.

CacheRemovals

long

The total number of removals from the cache.

CacheTxCommits

long

Total number of transaction commits.

CacheTxRollbacks

long

Total number of transaction rollbacks.

CacheSize

long

Local cache size.

CommitTime

histogram

Commit time in nanoseconds.

CommitTimeTotal

long

The total time of commit, in nanoseconds.

EntryProcessorHits

long

The total number of invocations on keys, which exist in cache.

EntryProcessorInvokeTimeNanos

long

The total time of cache invocations for which this node is the initiator, in nanoseconds.

EntryProcessorMaxInvocationTime

long

So far, the maximum time to execute cache invokes for which this node is the initiator.

EntryProcessorMinInvocationTime

long

So far, the minimum time to execute cache invokes for which this node is the initiator.

EntryProcessorMisses

long

The total number of invocations on keys, which don’t exist in cache.

EntryProcessorPuts

long

The total number of cache invocations, caused update.

EntryProcessorReadOnlyInvocations

long

The total number of cache invocations, caused no updates.

EntryProcessorRemovals

long

The total number of cache invocations, caused removals.

EstimatedRebalancingKeys

long

Number estimated to rebalance keys.

GetAllTime

histogram

GetAll time for which this node is the initiator, in nanoseconds.

GetTime

histogram

Get time for which this node is the initiator, in nanoseconds.

GetTimeTotal

long

The total time of cache gets for which this node is the initiator, in nanoseconds.

HeapEntriesCount

long

Onheap entries count.

IndexRebuildKeysProcessed

long

The number of keys with rebuilt indexes.

IsIndexRebuildInProgress

boolean

True if index build or rebuild is in progress.

OffHeapBackupEntriesCount

long

Offheap backup entries count.

OffHeapEntriesCount

long

Offheap entries count.

OffHeapEvictions

long

The total number of evictions from the off-heap memory.

OffHeapGets

long

The total number of get requests to the off-heap memory.

OffHeapHits

long

The number of get requests that were satisfied by the off-heap memory.

OffHeapMisses

long

A miss is a get request that is not satisfied by off-heap memory.

OffHeapPrimaryEntriesCount

long

Offheap primary entries count.

OffHeapPuts

long

The total number of put requests to the off-heap memory.

OffHeapRemovals

long

The total number of removals from the off-heap memory.

PutAllTime

histogram

PutAll time for which this node is the initiator, in nanoseconds.

PutTime

histogram

Put time for which this node is the initiator, in nanoseconds.

PutTimeTotal

long

The total time of cache puts for which this node is the initiator, in nanoseconds.

QueryCompleted

long

Count of completed queries.

QueryExecuted

long

Count of executed queries.

QueryFailed

long

Count of failed queries.

QueryMaximumTime

long

Maximum query execution time.

QueryMinimalTime

long

Minimum query execution time.

QuerySumTime

long

Query summary time.

RebalanceClearingPartitionsLeft

long

Number of partitions need to be cleared before actual rebalance start.

RebalanceStartTime

long

Rebalance start time.

RebalancedKeys

long

Number of already rebalanced keys.

RebalancingBytesRate

long

Estimated rebalancing speed in bytes.

RebalancingKeysRate

long

Estimated rebalancing speed in keys.

RemoveAllTime

histogram

RemoveAll time for which this node is the initiator, in nanoseconds.

RemoveTime

histogram

Remove time for which this node is the initiator. in nanoseconds.

RemoveTimeTotal

long

The total time of cache removal, in nanoseconds.

RollbackTime

histogram

Rollback time in nanoseconds.

RollbackTimeTotal

long

The total time of rollback, in nanoseconds.

TotalRebalancedBytes

long

Number of already rebalanced bytes.

getCacheTouches

long

The total number of touch() requests to the cache. Equal to the sum of hits and misses.

getCacheTouchHits

long

The number of touch() requests that were satisfied by the cache, i.e., "hits."

getCacheTouchMisses

long

The number of touch() requests that were not satisfied by the cache, i.e., "misses," either because the requested key was not found in the cache or TTL value was not changed.

getCacheTouchHitPercentage

float

The percentage of cache touch() requests that were satisfied by the cache. Calculated as getCacheTouchHits divided by getCacheTouches multiplied by 100.

getCacheTouchMissPercentage

float

The percentage of cache touch() requests that were not satisfied by the cache. Calculated as getCacheTouchMisses divided by getCacheTouches multiplied by 100.

Cache Groups

Name Type Description

Name	Type	Description
AffinityPartitionsAssignmentMap	java.util.Map	Affinity partitions assignment map.
Caches	java.util.ArrayList	List of caches
IndexBuildCountPartitionsLeft	long	Number of partitions need processed for finished indexes create or rebuilding.
LocalNodeMovingPartitionsCount	integer	Count of partitions with state `MOVING` for this cache group located on this node.
LocalNodeOwningPartitionsCount	integer	Count of partitions with state `OWNING` for this cache group located on this node.
LocalNodeRentingEntriesCount	long	Count of entries remains to evict in `RENTING` partitions located on this node for this cache group.
LocalNodeRentingPartitionsCount	integer	Count of partitions with state `RENTING` for this cache group located on this node.
MaximumNumberOfPartitionCopies	integer	Maximum number of partition copies for all partitions of this cache group.
MinimumNumberOfPartitionCopies	integer	Minimum number of partition copies for all partitions of this cache group.
MovingPartitionsAllocationMap	java.util.Map	Allocation map of partitions with state `MOVING` in the cluster.
OwningPartitionsAllocationMap	java.util.Map	Allocation map of partitions with state `OWNING` in the cluster.
PartitionIds	java.util.ArrayList	Local partition ids.
SparseStorageSize	long	Storage space allocated for group adjusted for possible sparsity, in bytes.
StorageSize	long	Storage space allocated for group, in bytes.
TotalAllocatedPages	long	Cache group total allocated pages.
TotalAllocatedSize	long	Total size of memory allocated for group, in bytes.

AffinityPartitionsAssignmentMap

java.util.Map

Affinity partitions assignment map.

Caches

java.util.ArrayList

List of caches

IndexBuildCountPartitionsLeft

long

Number of partitions need processed for finished indexes create or rebuilding.

LocalNodeMovingPartitionsCount

integer

Count of partitions with state MOVING for this cache group located on this node.

LocalNodeOwningPartitionsCount

integer

Count of partitions with state OWNING for this cache group located on this node.

LocalNodeRentingEntriesCount

long

Count of entries remains to evict in RENTING partitions located on this node for this cache group.

LocalNodeRentingPartitionsCount

integer

Count of partitions with state RENTING for this cache group located on this node.

MaximumNumberOfPartitionCopies

integer

Maximum number of partition copies for all partitions of this cache group.

MinimumNumberOfPartitionCopies

integer

Minimum number of partition copies for all partitions of this cache group.

MovingPartitionsAllocationMap

java.util.Map

Allocation map of partitions with state MOVING in the cluster.

OwningPartitionsAllocationMap

java.util.Map

Allocation map of partitions with state OWNING in the cluster.

PartitionIds

java.util.ArrayList

Local partition ids.

SparseStorageSize

long

Storage space allocated for group adjusted for possible sparsity, in bytes.

StorageSize

long

Storage space allocated for group, in bytes.

TotalAllocatedPages

long

Cache group total allocated pages.

TotalAllocatedSize

long

Total size of memory allocated for group, in bytes.

Transactions

Transaction metrics.

Name	Type	Description
AllOwnerTransactions	java.util.HashMap	Map of local node owning transactions.
LockedKeysNumber	long	The number of keys locked on the node.
OwnerTransactionsNumber	long	The number of active transactions for which this node is the initiator.
TransactionsHoldingLockNumber	long	The number of active transactions holding at least one key lock.
LastCommitTime	long	Last commit time.
nodeSystemTimeHistogram	histogram	Transactions system times on node represented as histogram.
nodeUserTimeHistogram	histogram	Transactions user times on node represented as histogram.
LastRollbackTime	long	Last rollback time.
totalNodeSystemTime	long	Total transactions system time on node.
totalNodeUserTime	long	Total transactions user time on node.
txCommits	integer	Number of transaction commits.
txRollbacks	integer	Number of transaction rollbacks.

Name

Type

Description

AllOwnerTransactions

java.util.HashMap

Map of local node owning transactions.

LockedKeysNumber

long

The number of keys locked on the node.

OwnerTransactionsNumber

long

The number of active transactions for which this node is the initiator.

TransactionsHoldingLockNumber

long

The number of active transactions holding at least one key lock.

LastCommitTime

long

Last commit time.

nodeSystemTimeHistogram

histogram

Transactions system times on node represented as histogram.

nodeUserTimeHistogram

histogram

Transactions user times on node represented as histogram.

LastRollbackTime

long

Last rollback time.

totalNodeSystemTime

long

Total transactions system time on node.

totalNodeUserTime

long

Total transactions user time on node.

txCommits

integer

Number of transaction commits.

txRollbacks

integer

Number of transaction rollbacks.

Partition Map Exchange

Partition map exchange metrics.

Name	Type	Description
CacheOperationsBlockedDuration	long	Current PME cache operations blocked duration in milliseconds.
CacheOperationsBlockedDurationHistogram	histogram	Histogram of cache operations blocked PME durations in milliseconds.
Duration	long	Current PME duration in milliseconds.
DurationHistogram	histogram	Histogram of PME durations in milliseconds.

Name

Type

Description

CacheOperationsBlockedDuration

long

Current PME cache operations blocked duration in milliseconds.

CacheOperationsBlockedDurationHistogram

histogram

Histogram of cache operations blocked PME durations in milliseconds.

Duration

long

Current PME duration in milliseconds.

DurationHistogram

histogram

Histogram of PME durations in milliseconds.

Compute Jobs

Name	Type	Description
compute.jobs.Active	long	Number of active jobs currently executing.
compute.jobs.Canceled	long	Number of cancelled jobs that are still running.
compute.jobs.ExecutionTime	long	Total execution time of jobs.
compute.jobs.Finished	long	Number of finished jobs.
compute.jobs.Rejected	long	Number of jobs rejected after more recent collision resolution operation.
compute.jobs.Started	long	Number of started jobs.
compute.jobs.Waiting	long	Number of currently queued jobs waiting to be executed.
compute.jobs.WaitingTime	long	Total time jobs spent on waiting queue.

Name

Type

Description

compute.jobs.Active

long

Number of active jobs currently executing.

compute.jobs.Canceled

long

Number of cancelled jobs that are still running.

compute.jobs.ExecutionTime

long

Total execution time of jobs.

compute.jobs.Finished

long

Number of finished jobs.

compute.jobs.Rejected

long

Number of jobs rejected after more recent collision resolution operation.

compute.jobs.Started

long

Number of started jobs.

compute.jobs.Waiting

long

Number of currently queued jobs waiting to be executed.

compute.jobs.WaitingTime

long

Total time jobs spent on waiting queue.

Thread Pools

Name	Type	Description
ActiveCount	long	Approximate number of threads that are actively executing tasks.
CompletedTaskCount	long	Approximate total number of tasks that have completed execution.
CorePoolSize	long	The core number of threads.
KeepAliveTime	long	Thread keep-alive time, which is the amount of time which threads in excess of the core pool size may remain idle before being terminated.
LargestPoolSize	long	Largest number of threads that have ever simultaneously been in the pool.
MaximumPoolSize	long	The maximum allowed number of threads.
PoolSize	long	Current number of threads in the pool.
QueueSize	long	Current size of the execution queue.
RejectedExecutionHandlerClass	string	Class name of current rejection handler.
Shutdown	boolean	True if this executor has been shut down.
TaskCount	long	Approximate total number of tasks that have been scheduled for execution.
Terminated	boolean	True if all tasks have completed following shut down.
Terminating	long	True if terminating but not yet terminated.
ThreadFactoryClass	string	Class name of thread factory used to create new threads.

Name

Type

Description

ActiveCount

long

Approximate number of threads that are actively executing tasks.

CompletedTaskCount

long

Approximate total number of tasks that have completed execution.

CorePoolSize

long

The core number of threads.

KeepAliveTime

long

Thread keep-alive time, which is the amount of time which threads in excess of the core pool size may remain idle before being terminated.

LargestPoolSize

long

Largest number of threads that have ever simultaneously been in the pool.

MaximumPoolSize

long

The maximum allowed number of threads.

PoolSize

long

Current number of threads in the pool.

QueueSize

long

Current size of the execution queue.

RejectedExecutionHandlerClass

string

Class name of current rejection handler.

Shutdown

boolean

True if this executor has been shut down.

TaskCount

long

Approximate total number of tasks that have been scheduled for execution.

Terminated

boolean

True if all tasks have completed following shut down.

Terminating

long

True if terminating but not yet terminated.

ThreadFactoryClass

string

Class name of thread factory used to create new threads.

Cache Group IO

Name	Type	Description
LOGICAL_READS	long	Number of logical reads
PHYSICAL_READS	long	Number of physical reads
grpId	integer	Group id
name	string	Name of the index
startTime	long	Statistics collect start time

Name

Type

Description

LOGICAL_READS

long

Number of logical reads

PHYSICAL_READS

long

Number of physical reads

grpId

integer

Group id

name

string

Name of the index

startTime

long

Statistics collect start time

Sorted Indexes

Name	Type	Description
LOGICAL_READS_INNER	long	Number of logical reads for inner tree node
LOGICAL_READS_LEAF	long	Number of logical reads for leaf tree node
PHYSICAL_READS_INNER	long	Number of physical reads for inner tree node
PHYSICAL_READS_LEAF	long	Number of physical reads for leaf tree node
indexName	string	Name of the index
name	string	Name of the cache
startTime	long	Statistics collection start time

Name

Type

Description

LOGICAL_READS_INNER

long

Number of logical reads for inner tree node

LOGICAL_READS_LEAF

long

Number of logical reads for leaf tree node

PHYSICAL_READS_INNER

long

Number of physical reads for inner tree node

PHYSICAL_READS_LEAF

long

Number of physical reads for leaf tree node

indexName

string

Name of the index

name

string

Name of the cache

startTime

long

Statistics collection start time

Hash Indexes

Name	Type	Description
LOGICAL_READS_INNER	long	Number of logical reads for inner tree node
LOGICAL_READS_LEAF	long	Number of logical reads for leaf tree node
PHYSICAL_READS_INNER	long	Number of physical reads for inner tree node
PHYSICAL_READS_LEAF	long	Number of physical reads for leaf tree node
indexName	string	Name of the index
name	string	Name of the cache
startTime	long	Statistics collection start time

Name

Type

Description

LOGICAL_READS_INNER

long

Number of logical reads for inner tree node

LOGICAL_READS_LEAF

long

Number of logical reads for leaf tree node

PHYSICAL_READS_INNER

long

Number of physical reads for inner tree node

PHYSICAL_READS_LEAF

long

Number of physical reads for leaf tree node

indexName

string

Name of the index

name

string

Name of the cache

startTime

long

Statistics collection start time

Communication IO

Name	Type	Description
ActiveSessionsCount	integer	Active TCP sessions count.
OutboundMessagesQueueSize	integer	Outbound messages queue size.
SentMessagesCount	integer	Sent messages count.
SentBytesCount	long	Sent bytes count.
ReceivedBytesCount	long	Received bytes count.
ReceivedMessagesCount	integer	Received messages count.
RejectedSslSessionsCount	integer	TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).
SslEnabled	boolean	Indicates whether SSL is enabled.
SslHandshakeDurationHistogram	histogram	Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Name

Type

Description

ActiveSessionsCount

integer

Active TCP sessions count.

OutboundMessagesQueueSize

integer

Outbound messages queue size.

SentMessagesCount

integer

Sent messages count.

SentBytesCount

long

Sent bytes count.

ReceivedBytesCount

long

Received bytes count.

ReceivedMessagesCount

integer

Received messages count.

RejectedSslSessionsCount

integer

TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).

SslEnabled

boolean

Indicates whether SSL is enabled.

SslHandshakeDurationHistogram

histogram

Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Ignite Thin Client Connector

Name	Type	Description
ActiveSessionsCount	integer	Active TCP sessions count.
ReceivedBytesCount	long	Received bytes count.
RejectedSslSessionsCount	integer	TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).
RejectedSessionsTimeout	integer	TCP sessions count that were rejected due to handshake timeout.
RejectedSessionsAuthenticationFailed	integer	TCP sessions count that were rejected due to failed authentication.
RejectedSessionsTotal	integer	Total number of rejected TCP connections.
{clientType}.AcceptedSessions	integer	Number of successfully established sessions for the client type.
{clientType}.ActiveSessions	integer	Number of active sessions for the client type.
SentBytesCount	long	Sent bytes count.
SslEnabled	boolean	Indicates whether SSL is enabled.
SslHandshakeDurationHistogram	histogram	Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Name

Type

Description

ActiveSessionsCount

integer

Active TCP sessions count.

ReceivedBytesCount

long

Received bytes count.

RejectedSslSessionsCount

integer

TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).

RejectedSessionsTimeout

integer

TCP sessions count that were rejected due to handshake timeout.

RejectedSessionsAuthenticationFailed

integer

TCP sessions count that were rejected due to failed authentication.

RejectedSessionsTotal

integer

Total number of rejected TCP connections.

{clientType}.AcceptedSessions

integer

Number of successfully established sessions for the client type.

{clientType}.ActiveSessions

integer

Number of active sessions for the client type.

SentBytesCount

long

Sent bytes count.

SslEnabled

boolean

Indicates whether SSL is enabled.

SslHandshakeDurationHistogram

histogram

Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Ignite REST Client Connector

Name	Type	Description
ActiveSessionsCount	integer	Active TCP sessions count.
ReceivedBytesCount	long	Received bytes count.
RejectedSslSessionsCount	integer	TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).
SentBytesCount	long	Sent bytes count.
SslEnabled	boolean	Indicates whether SSL is enabled.
SslHandshakeDurationHistogram	histogram	Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Name

Type

Description

ActiveSessionsCount

integer

Active TCP sessions count.

ReceivedBytesCount

long

Received bytes count.

RejectedSslSessionsCount

integer

TCP sessions count that were rejected due to the SSL errors (metric is exported only if SSL is enabled).

SentBytesCount

long

Sent bytes count.

SslEnabled

boolean

Indicates whether SSL is enabled.

SslHandshakeDurationHistogram

histogram

Histogram of SSL handshake duration in milliseconds (metric is exported only if SSL is enabled).

Discovery IO

Name	Type	Description
CoordinatorSince	long	Timestamp since which the local node became the coordinator (metric is exported only from server nodes).
Coordinator	UUID	Coordinator ID (metric is exported only from server nodes).
CurrentTopologyVersion	long	Current topology version.
JoinedNodes	integer	Joined nodes count.
LeftNodes	integer	Left nodes count.
MessageWorkerQueueSize	integer	Current message worker queue size.
PendingMessagesRegistered	integer	Pending registered messages count.
RejectedSslConnectionsCount	integer	TCP discovery connections count that were rejected due to the SSL errors.
SslEnabled	boolean	Indicates whether SSL is enabled.
TotalProcessedMessages	integer	Total processed messages count.
TotalReceivedMessages	integer	Total received messages count.

Name

Type

Description

CoordinatorSince

long

Timestamp since which the local node became the coordinator (metric is exported only from server nodes).

Coordinator

UUID

Coordinator ID (metric is exported only from server nodes).

CurrentTopologyVersion

long

Current topology version.

JoinedNodes

integer

Joined nodes count.

LeftNodes

integer

Left nodes count.

MessageWorkerQueueSize

integer

Current message worker queue size.

PendingMessagesRegistered

integer

Pending registered messages count.

RejectedSslConnectionsCount

integer

TCP discovery connections count that were rejected due to the SSL errors.

SslEnabled

boolean

Indicates whether SSL is enabled.

TotalProcessedMessages

integer

Total processed messages count.

TotalReceivedMessages

integer

Total received messages count.

Data Region IO

Name Type Description

Name	Type	Description
AllocationRate	long	Allocation rate (pages per second) averaged across rateTimeInternal.
CheckpointBufferSize	long	Checkpoint buffer size in bytes.
DirtyPages	long	Number of pages in memory not yet synchronized with persistent storage.
EmptyDataPages	long	Calculates empty data pages count for region. It counts only totally free pages that can be reused (e. g. pages that are contained in reuse bucket of free list).
EvictionRate	long	Eviction rate (pages per second).
LargeEntriesPagesCount	long	Count of pages that fully ocupied by large entries that go beyond page size
OffHeapSize	long	Offheap size in bytes.
OffheapUsedSize	long	Offheap used size in bytes.
PagesFillFactor	double	The percentage of the used space.
PagesRead	long	Number of pages read from last restart.
PagesReplaceAge	long	Average age at which pages in memory are replaced with pages from persistent storage (milliseconds).
PagesReplaceRate	long	Rate at which pages in memory are replaced with pages from persistent storage (pages per second).
PagesReplaced	long	Number of pages replaced from last restart.
PagesWritten	long	Number of pages written from last restart.
PhysicalMemoryPages	long	Number of pages residing in physical RAM.
PhysicalMemorySize	long	Gets total size of pages loaded to the RAM, in bytes.
SizeUsedByData	long	Returns the number of bytes, occupied by data. Similar to `TotalUsedSize`, but it also takes into account the empty space in non-empty pages.
TotalUsedSize	long	Gets an amount of bytes, occupied by non-empty pages allocated in the data region
TotalUsedPages	long	Gets an amount of non-empty pages allocated in the data region.
TotalAllocatedPages	long	Total number of allocated pages.
TotalAllocatedSize	long	Gets a total size of memory allocated in the data region, in bytes.
TotalThrottlingTime	long	Total throttling threads time in milliseconds. The Ignite throttles threads that generate dirty pages during the ongoing checkpoint.
UsedCheckpointBufferSize	long	Gets used checkpoint buffer size in bytes

AllocationRate

long

Allocation rate (pages per second) averaged across rateTimeInternal.

CheckpointBufferSize

long

Checkpoint buffer size in bytes.

DirtyPages

long

Number of pages in memory not yet synchronized with persistent storage.

EmptyDataPages

long

Calculates empty data pages count for region. It counts only totally free pages that can be reused (e. g. pages that are contained in reuse bucket of free list).

EvictionRate

long

Eviction rate (pages per second).

LargeEntriesPagesCount

long

Count of pages that fully ocupied by large entries that go beyond page size

OffHeapSize

long

Offheap size in bytes.

OffheapUsedSize

long

Offheap used size in bytes.

PagesFillFactor

double

The percentage of the used space.

PagesRead

long

Number of pages read from last restart.

PagesReplaceAge

long

Average age at which pages in memory are replaced with pages from persistent storage (milliseconds).

PagesReplaceRate

long

Rate at which pages in memory are replaced with pages from persistent storage (pages per second).

PagesReplaced

long

Number of pages replaced from last restart.

PagesWritten

long

Number of pages written from last restart.

PhysicalMemoryPages

long

Number of pages residing in physical RAM.

PhysicalMemorySize

long

Gets total size of pages loaded to the RAM, in bytes.

SizeUsedByData

long

Returns the number of bytes, occupied by data. Similar to TotalUsedSize, but it also takes into account the empty space in non-empty pages.

TotalUsedSize

long

Gets an amount of bytes, occupied by non-empty pages allocated in the data region

TotalUsedPages

long

Gets an amount of non-empty pages allocated in the data region.

TotalAllocatedPages

long

Total number of allocated pages.

TotalAllocatedSize

long

Gets a total size of memory allocated in the data region, in bytes.

TotalThrottlingTime

long

Total throttling threads time in milliseconds. The Ignite throttles threads that generate dirty pages during the ongoing checkpoint.

UsedCheckpointBufferSize

long

Gets used checkpoint buffer size in bytes

Data Storage

Data Storage metrics.

Name	Type	Description
CheckpointBeforeLockHistogram	histogram	Histogram of checkpoint action before taken write lock duration in milliseconds.
CheckpointFsyncHistogram	histogram	Histogram of checkpoint fsync duration in milliseconds.
CheckpointHistogram	histogram	Histogram of checkpoint duration in milliseconds.
CheckpointListenersExecuteHistogram	histogram	Histogram of checkpoint execution listeners under write lock duration in milliseconds.
CheckpointLockHoldHistogram	histogram	Histogram of checkpoint lock hold duration in milliseconds.
CheckpointLockWaitHistogram	histogram	Histogram of checkpoint lock wait duration in milliseconds.
CheckpointMarkHistogram	histogram	Histogram of checkpoint mark duration in milliseconds.
CheckpointPagesWriteHistogram	histogram	Histogram of checkpoint pages write duration in milliseconds.
CheckpointSplitAndSortPagesHistogram	histogram	Histogram of splitting and sorting checkpoint pages duration in milliseconds.
CheckpointTotalTime	long	Total duration of checkpoint
CheckpointWalRecordFsyncHistogram	histogram	Histogram of the WAL fsync after logging CheckpointRecord on begin of checkpoint duration in milliseconds.
CheckpointWriteEntryHistogram	histogram	Histogram of entry buffer writing to file duration in milliseconds.
LastCheckpointBeforeLockDuration	long	Duration of the checkpoint action before taken write lock in milliseconds.
LastCheckpointCopiedOnWritePagesNumber	long	Number of pages copied to a temporary checkpoint buffer during the last checkpoint.
LastCheckpointDataPagesNumber	long	Total number of data pages written during the last checkpoint.
LastCheckpointDuration	long	Duration of the last checkpoint in milliseconds.
LastCheckpointFsyncDuration	long	Duration of the sync phase of the last checkpoint in milliseconds.
LastCheckpointListenersExecuteDuration	long	Duration of the checkpoint execution listeners under write lock in milliseconds.
LastCheckpointLockHoldDuration	long	Duration of the checkpoint lock hold in milliseconds.
LastCheckpointLockWaitDuration	long	Duration of the checkpoint lock wait in milliseconds.
LastCheckpointMarkDuration	long	Duration of the checkpoint mark in milliseconds.
LastCheckpointPagesWriteDuration	long	Duration of the checkpoint pages write in milliseconds.
LastCheckpointTotalPagesNumber	long	Total number of pages written during the last checkpoint.
LastCheckpointSplitAndSortPagesDuration	long	Duration of splitting and sorting checkpoint pages of the last checkpoint in milliseconds.
LastCheckpointStart	long	Start timestamp of the last checkpoint.
LastCheckpointWalRecordFsyncDuration	long	Duration of the WAL fsync after logging CheckpointRecord on the start of the last checkpoint in milliseconds.
LastCheckpointWriteEntryDuration	long	Duration of entry buffer writing to file of the last checkpoint in milliseconds.
SparseStorageSize	long	Storage space allocated adjusted for possible sparsity, in bytes.
StorageSize	long	Storage space allocated, in bytes.
WalArchiveSegments	integer	Current number of WAL segments in the WAL archive.
WalBuffPollSpinsRate	long	WAL buffer poll spins number over the last time interval.
WalFsyncTimeDuration	long	Total duration of fsync
WalFsyncTimeNum	long	Total count of fsync
WalLastRollOverTime	long	Time of the last WAL segment rollover.
WalLoggingRate	long	Average number of WAL records per second written during the last time interval.
WalTotalSize	long	Total size in bytes for storage wal files.
WalWritingRate	long	Average number of bytes per second written during the last time interval.

Name

Type

Description

CheckpointBeforeLockHistogram

histogram

Histogram of checkpoint action before taken write lock duration in milliseconds.

CheckpointFsyncHistogram

histogram

Histogram of checkpoint fsync duration in milliseconds.

CheckpointHistogram

histogram

Histogram of checkpoint duration in milliseconds.

CheckpointListenersExecuteHistogram

histogram

Histogram of checkpoint execution listeners under write lock duration in milliseconds.

CheckpointLockHoldHistogram

histogram

Histogram of checkpoint lock hold duration in milliseconds.

CheckpointLockWaitHistogram

histogram

Histogram of checkpoint lock wait duration in milliseconds.

CheckpointMarkHistogram

histogram

Histogram of checkpoint mark duration in milliseconds.

CheckpointPagesWriteHistogram

histogram

Histogram of checkpoint pages write duration in milliseconds.

CheckpointSplitAndSortPagesHistogram

histogram

Histogram of splitting and sorting checkpoint pages duration in milliseconds.

CheckpointTotalTime

long

Total duration of checkpoint

CheckpointWalRecordFsyncHistogram

histogram

Histogram of the WAL fsync after logging CheckpointRecord on begin of checkpoint duration in milliseconds.

CheckpointWriteEntryHistogram

histogram

Histogram of entry buffer writing to file duration in milliseconds.

LastCheckpointBeforeLockDuration

long

Duration of the checkpoint action before taken write lock in milliseconds.

LastCheckpointCopiedOnWritePagesNumber

long

Number of pages copied to a temporary checkpoint buffer during the last checkpoint.

LastCheckpointDataPagesNumber

long

Total number of data pages written during the last checkpoint.

LastCheckpointDuration

long

Duration of the last checkpoint in milliseconds.

LastCheckpointFsyncDuration

long

Duration of the sync phase of the last checkpoint in milliseconds.

LastCheckpointListenersExecuteDuration

long

Duration of the checkpoint execution listeners under write lock in milliseconds.

LastCheckpointLockHoldDuration

long

Duration of the checkpoint lock hold in milliseconds.

LastCheckpointLockWaitDuration

long

Duration of the checkpoint lock wait in milliseconds.

LastCheckpointMarkDuration

long

Duration of the checkpoint mark in milliseconds.

LastCheckpointPagesWriteDuration

long

Duration of the checkpoint pages write in milliseconds.

LastCheckpointTotalPagesNumber

long

Total number of pages written during the last checkpoint.

LastCheckpointSplitAndSortPagesDuration

long

Duration of splitting and sorting checkpoint pages of the last checkpoint in milliseconds.

LastCheckpointStart

long

Start timestamp of the last checkpoint.

LastCheckpointWalRecordFsyncDuration

long

Duration of the WAL fsync after logging CheckpointRecord on the start of the last checkpoint in milliseconds.

LastCheckpointWriteEntryDuration

long

Duration of entry buffer writing to file of the last checkpoint in milliseconds.

SparseStorageSize

long

Storage space allocated adjusted for possible sparsity, in bytes.

StorageSize

long

Storage space allocated, in bytes.

WalArchiveSegments

integer

Current number of WAL segments in the WAL archive.

WalBuffPollSpinsRate

long

WAL buffer poll spins number over the last time interval.

WalFsyncTimeDuration

long

Total duration of fsync

WalFsyncTimeNum

long

Total count of fsync

WalLastRollOverTime

long

Time of the last WAL segment rollover.

WalLoggingRate

long

Average number of WAL records per second written during the last time interval.

WalTotalSize

long

Total size in bytes for storage wal files.

WalWritingRate

long

Average number of bytes per second written during the last time interval.

Cluster

Cluster metrics.

Name	Type	Description
ActiveBaselineNodes	integer	Active baseline nodes count.
Rebalanced	boolean	True if the cluster has fully achieved rebalanced state. Note that an inactive cluster always has this metric in False regardless of the real partitions state.
TotalBaselineNodes	integer	Total baseline nodes count.
TotalClientNodes	integer	Client nodes count.
TotalServerNodes	integer	Server nodes count.

Name

Type

Description

ActiveBaselineNodes

integer

Active baseline nodes count.

Rebalanced

boolean

True if the cluster has fully achieved rebalanced state. Note that an inactive cluster always has this metric in False regardless of the real partitions state.

TotalBaselineNodes

integer

Total baseline nodes count.

TotalClientNodes

integer

Client nodes count.

TotalServerNodes

integer

Server nodes count.

SQL

SQL metrics.

Memory Quotas

Name	Type	Description
OffloadedQueriesNumber	number	Number of queries that were offloaded to disk locally
OffloadingRead	bytes	Number of bytes read from the disk during SQL query offloading
OffloadingWritten	bytes	Number of bytes written to the disk during SQL query offloading
freeMem	bytes	Amount of memory left available for the queries on this node, in bytes (negative value if SQL memory quotas are disabled)
maxMem	bytes	Total amount of memory available for all queries on the current node (negative value if SQL memory quotas are disabled)
requests	number	Total number of times memory quota has been requested on the current node by all the queries

Name

Type

Description

OffloadedQueriesNumber

number

Number of queries that were offloaded to disk locally

OffloadingRead

bytes

Number of bytes read from the disk during SQL query offloading

OffloadingWritten

bytes

Number of bytes written to the disk during SQL query offloading

freeMem

bytes

Amount of memory left available for the queries on this node, in bytes (negative value if SQL memory quotas are disabled)

maxMem

bytes

Total amount of memory available for all queries on the current node (negative value if SQL memory quotas are disabled)

requests

number

Total number of times memory quota has been requested on the current node by all the queries

Parser Cache

Name	Type	Description
hits	number	Number of hits for queries cache
misses	number	Number of misses for queries cache

Name

Type

Description

hits

number

Number of hits for queries cache

misses

number

Number of misses for queries cache

User Queries

canceled	number	Number of canceled queries initiated by the current node. This number is included in the general 'failed' metric.
failed	number	Number of failed queries (including OOME) initiated by the current node
failedByOOM	number	Number of queries failed due to out of memory protection initiated by the current node. This number is included in the general 'failed' metric.
success	number	Number of successfully executed queries initiated by the current node

canceled

number

Number of canceled queries initiated by the current node. This number is included in the general 'failed' metric.

failed

number

Number of failed queries (including OOME) initiated by the current node

failedByOOM

number

Number of queries failed due to out of memory protection initiated by the current node. This number is included in the general 'failed' metric.

success

number

Number of successfully executed queries initiated by the current node

Throttling

Throttling metrics for the Write operation. Speed-based throttling protects the checkpoint buffer and the clean pages in the region. The checkpoint buffer needs a stronger protection because an overflow of this buffer makes a node crash. When performing a Write operation, we first check whether the checkpoint buffer is in danger. If it is, we employ the exponential backoff algorithm to protect the buffer: each subsequent "sleep" time is K times longer than the previous one. If the checkpoint buffer is not in danger, we calculate the "sleep" time using the speed-based algorithm to protect the pool of clean pages.

Name	Type	Description
SpeedBasedThrottlingPercentage	double	Fraction of throttling time within average marking time (e.g., "quarter" = 0.25).
MarkDirtySpeed	long	Speed of marking pages dirty, in pages/second. Value is averaged over the last 3 fragments, 0.25 sec each, plus the current fragment, 0-0.25 sec (0.75-1.0 sec total).
CpWriteSpeed	long	Checkpoint write speed, in pages/second. Value is averaged over the last 3 checkpoints plus the current one.
LastEstimatedSpeedForMarkAll	long	Last estimated speed of marking all clean pages dirty to the end of a checkpoint, in pages/second.
CurrDirtyRatio	double	Current ratio of dirty pages (dirty vs total), expressed as a fraction. The fraction is computed for each segment in the current region, and the highest value becomes "current."
TargetDirtyRatio	double	Ratio of dirty pages (dirty vs total), expressed as a fraction. Throttling starts when this ratio is reached.
ThrottleParkTime	long	Park (sleep) time for the Write operation, in nanoseconds. Value is averaged over the last 3 fragments, 0.25 sec each, plus the current fragment, 0-0.25 sec (0.75-1.0 sec total). It defines park periods for either the checkpoint buffer protection or the clean page pool protection.
CpTotalPages	int	Number of pages in the current checkpoint.
CpEvictedPages	int	Number of evicted pages in the current checkpoint.
CpWrittenPages	int	Number of written pages in the current checkpoint.
CpSyncedPages	int	Number of fsynced pages in the current checkpoint.
CheckpointBufferPagesCount	int	Number of occupied pages in the checkpoint buffer.
CheckpointBufferPagesSize	int	Total number of pages in the checkpoint buffer.

Name

Type

Description

SpeedBasedThrottlingPercentage

double

Fraction of throttling time within average marking time (e.g., "quarter" = 0.25).

MarkDirtySpeed

long

Speed of marking pages dirty, in pages/second. Value is averaged over the last 3 fragments, 0.25 sec each, plus the current fragment, 0-0.25 sec (0.75-1.0 sec total).

CpWriteSpeed

long

Checkpoint write speed, in pages/second. Value is averaged over the last 3 checkpoints plus the current one.

LastEstimatedSpeedForMarkAll

long

Last estimated speed of marking all clean pages dirty to the end of a checkpoint, in pages/second.

CurrDirtyRatio

double

Current ratio of dirty pages (dirty vs total), expressed as a fraction. The fraction is computed for each segment in the current region, and the highest value becomes "current."

TargetDirtyRatio

double

Ratio of dirty pages (dirty vs total), expressed as a fraction. Throttling starts when this ratio is reached.

ThrottleParkTime

long

Park (sleep) time for the Write operation, in nanoseconds. Value is averaged over the last 3 fragments, 0.25 sec each, plus the current fragment, 0-0.25 sec (0.75-1.0 sec total). It defines park periods for either the checkpoint buffer protection or the clean page pool protection.

CpTotalPages

int

Number of pages in the current checkpoint.

CpEvictedPages

int

Number of evicted pages in the current checkpoint.

CpWrittenPages

int

Number of written pages in the current checkpoint.

CpSyncedPages

int

Number of fsynced pages in the current checkpoint.

CheckpointBufferPagesCount

int

Number of occupied pages in the checkpoint buffer.

CheckpointBufferPagesSize

int

Total number of pages in the checkpoint buffer.

Data Center Replication

Receiver Metrics

Attribute	Type	Description	Scope
BatchesReceived	int	Total size of batches received from remote DC <dcID>.	Node
EntriesReceived	long	Total number of entries received from remote DC <dcID>.	Node
BytesReceived	long	Total number of batches received from remote DC <dcID>.	Node
BytesAcked	long	Total size of batches acked from remote DC in bytes.	Node
EntriesAcked	long	Total number of entries acked from remote DC.	Node
BatchesAcked	int	Total number of batches acked from remote DC.	Node
BatchesSent	int	Number of batches waiting to be stored in cache.	Node
EntriesSent	long	Number of entries waiting to be stored in cache.	Node
BytesSent	long	Number of entries waiting to be stored in cache.	Node
AverageBatchAckTime	double	Average time in milliseconds between sending batch to receiver cache nodes and successfully storing it.	Node

Attribute

Type

Description

Scope

BatchesReceived

int

Total size of batches received from remote DC <dcID>.

Node

EntriesReceived

long

Total number of entries received from remote DC <dcID>.

Node

BytesReceived

long

Total number of batches received from remote DC <dcID>.

Node

BytesAcked

long

Total size of batches acked from remote DC in bytes.

Node

EntriesAcked

long

Total number of entries acked from remote DC.

Node

BatchesAcked

int

Total number of batches acked from remote DC.

Node

BatchesSent

int

Number of batches waiting to be stored in cache.

Node

EntriesSent

long

Number of entries waiting to be stored in cache.

Node

BytesSent

long

Number of entries waiting to be stored in cache.

Node

AverageBatchAckTime

double

Average time in milliseconds between sending batch to receiver cache nodes and successfully storing it.

Node

Sender Metrics

Attribute

Type

Description

Scope

BytesReceived

long

Total size of batches in bytes received by the sender from data nodes.

Node

EntriesReceived

long

Total number of entries were received by the sender from data nodes.

Node

BatchesReceived

int

Total number of batches received by the sender from data nodes.

Node

BatchesSent

int

Number of sent batches.

Node

EntriesSent

long

Number of sent entries.

Node

BytesSent

long

Number of sent bytes.

Node

BatchesAcked

int

Number of acknowledged batches.

Node

EntriesAcked

long

Number of acknowledged sent entries.

Node

BytesAcked

long

Number of acknowledged bytes.

Node

BatchesError

int

Number of sent batches that caused an error.

Node

EntriesError

long

Number of sent entries that caused an error.

Node

BytesError

long

Number of sent bytes that caused an error.

Node

AverageBatchAckTime

double

Total time in milliseconds between sending batches for the first time and receiving acknowledgement.

Node

Cache Metrics

Attribute	Type	Description	Scope
pendingQueueSize	long	Number of cache updates in the DR pending queue.	Node
backupQueueSize	long	Number of cache updates in the DR backup queue.	Node

Attribute

Type

Description

Scope

pendingQueueSize

long

Number of cache updates in the DR pending queue.

Node

backupQueueSize

long

Number of cache updates in the DR backup queue.

Node

Histograms

Metrics that represent histograms are available in the JMX exporter only. Histogram metrics are exported as a set of values where each value corresponds to a specific bucket, and is available through a separate JMX bean attribute. The attribute names of a histogram metric have the following format:

{metric_name}_{low_bound}_{high_bound}

where

{metric_name} - the name of the metric
{low_bound} - start of the bound, 0 for the first bound
{high_bound} - end of the bound, inf for the last bound

Examples of the metric names if the bounds are [10,100]:

histogram_0_10 - less than 10
histogram_10_100 - between 10 and 100
histogram_100_inf - more than 100

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Last updated on Jul 01, 2025