Yandex Monitoring metric reference

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Updated at November 27, 2025

CPU metrics
Disk metrics
Disk operation metrics
RAM metrics
Network metrics
Service metrics
Other metrics

This section describes Managed Service for ClickHouse® metrics delivered to Monitoring.

The metric name goes into the name label.

Labels shared by all Managed Service for ClickHouse® metrics:

Label	Value
service	Service ID: `managed-clickhouse`
resource_type	Resource type: `cluster`
resource_id	Cluster ID
host	Host FQDN
node	Host type: `replica`, `follower`, or `leader`
subcluster_name	Subcluster type: `clickhouse_subcluster` or `zookeeper_subcluster`
shard	Shard ID

CPU metrics

CPU core workload.

Name Type, units	Description
`cpu.fraction` `DGAUGE`, %	Guaranteed vCPU performance
`cpu.guarantee` `DGAUGE`, count	Guaranteed number of cores
`cpu.limit` `DGAUGE`, count	Maximum number of cores in use
`cpu.guest` `DGAUGE`, %	CPU core usage, `guest` usage type
`cpu.idle` `DGAUGE`, %	CPU core usage, `idle` usage type
`cpu.iowait` `DGAUGE`, %	CPU core usage, `iowait` usage type
`cpu.irq` `DGAUGE`, %	CPU core usage, `irq` usage type
`cpu.nice` `DGAUGE`, %	CPU core usage, `nice` usage type
`cpu.softirq` `DGAUGE`, %	CPU core usage, `softirq` usage type
`cpu.steal` `DGAUGE`, %	CPU core usage, `steal` usage type
`cpu.system` `DGAUGE`, %	CPU core usage, `system` usage type
`cpu.user` `DGAUGE`, %	CPU core usage, `user` usage type
`load.avg_15min` `DGAUGE`, %	Average load over 15 minutes
`load.avg_1min` `DGAUGE`, %	Average load over one minute
`load.avg_5min` `DGAUGE`, %	Average load over five minutes

Disk metrics

Name Type, units	Description
`ch_s3_disk_parts_size` `DGAUGE`, bytes	Space used by MergeTree table parts in Yandex Object Storage with a Managed Service for ClickHouse® hybrid storage configured.
`disk.free_bytes` `DGAUGE`, bytes	Free space
`disk.free_inodes` `DGAUGE`, count	Free inodes
`disk.total_bytes` `DGAUGE`, bytes	Available space
`disk.total_inodes` `DGAUGE`, count	Available inodes
`disk.used_bytes` `DGAUGE`, bytes	Used space
`disk.used_inodes` `DGAUGE`, count	Used inodes

Disk operation metrics

Name Type, units	Description
`io.avg_read_time` `DGAUGE`, milliseconds	Average disk read time
`io.avg_write_time` `DGAUGE`, milliseconds	Average disk write time
`io.disk*.avg_read_time` `DGAUGE`, milliseconds	Average read time for a given disk
`io.disk*.avg_write_time` `DGAUGE`, milliseconds	Average write time for a given disk
`io.disk*.read_bytes` `DGAUGE`, bytes per second	Read speed for a given disk
`io.disk*.read_count` `DGAUGE`, operations per second	Number of reads per second for a given disk
`io.disk*.read_merged_count` `DGAUGE`, operations per second	Number of merged read operations per second for a given disk
`io.disk*.utilization` `DGAUGE`, %	Utilization of a given disk; disabled for network drives.
`io.disk*.write_bytes` `DGAUGE`, bytes per second	Write speed for a given disk
`io.disk*.write_count` `DGAUGE`, operations per second	Number of writes per second for a given disk
`io.disk*.write_merged_count` `DGAUGE`, operations per second	Number of merged write operations per second for a given disk
`io.read_bytes` `DGAUGE`, bytes per second	Disk read rate
`io.read_count` `DGAUGE`, operations per second	Number of read operations per second
`io.read_merged_count` `DGAUGE`, operations per second	Number of merged read operations per second
`io.utilization` `DGAUGE`, %	Disk utilization disabled for network drives
`io.write_bytes` `DGAUGE`, bytes per second	Disk write speed
`io.write_count` `DGAUGE`, operations per second	Number of writes per second
`io.write_merged_count` `DGAUGE`, operations per second	Number of merged write operations per second

RAM metrics

Name Type, units	Description
`mem.guarantee_bytes` `DGAUGE`, bytes	Guaranteed memory allocation
`mem.limit_bytes` `DGAUGE`, bytes	Memory limit
`mem.active_bytes` `DGAUGE`, bytes	Active resident memory (frequently accessed and released when absolutely necessary)
`mem.available_bytes` `DGAUGE`, bytes	RAM usage, `available` usage type
`mem.buffers_bytes` `DGAUGE`, bytes	RAM usage, `buffers` usage type
`mem.cached_bytes` `DGAUGE`, bytes	RAM usage, `cached` usage type
`mem.free_bytes` `DGAUGE`, bytes	Amount of free RAM available, excluding `mem.buffers_bytes` and `mem.cached_bytes`
`mem.shared_bytes` `DGAUGE`, bytes	RAM usage, `shared` usage type
`mem.total_bytes` `DGAUGE`, bytes	RAM usage, `total` usage type
`mem.used_bytes` `DGAUGE`, bytes	Amount of RAM currently used by running processes

Network metrics

Name Type, units	Description
`net.bytes_recv` `DGAUGE`, bytes per second	Network data receive rate
`net.bytes_sent` `DGAUGE`, bytes per second	Network data transmit rate
`net.dropin` `DGAUGE`, count	Dropped receive packets
`net.dropout` `DGAUGE`, count	Dropped transmit packets
`net.errin` `DGAUGE`, count	Receive error count
`net.errout` `DGAUGE`, count	Transmit error count
`net.packets_recv` `DGAUGE`, packets per second	Network packet receive rate
`net.packets_sent` `DGAUGE`, packets per second	Network packet transmit rate

Service metrics

System event metrics

These are ClickHouse® native metrics from the system.events table.
For each metric, the increment (inc) and change per unit of time (rate) are calculated.

Name Type
`ch_system_events_ArenaAllocBytes_inc` `DGAUGE`
`ch_system_events_ArenaAllocBytes_rate` `DGAUGE`
`ch_system_events_ArenaAllocChunks_inc` `DGAUGE`
`ch_system_events_ArenaAllocChunks_rate` `DGAUGE`
`ch_system_events_BackgroundLoadingMarksTasks_inc` `DGAUGE`
`ch_system_events_BackgroundLoadingMarksTasks_rate` `DGAUGE`
`ch_system_events_CreatedHTTPConnections_inc` `DGAUGE`
`ch_system_events_CreatedHTTPConnections_rate` `DGAUGE`
`ch_system_events_CompileExpressionsBytes_inc` `DGAUGE`
`ch_system_events_CompileExpressionsBytes_rate` `DGAUGE`
`ch_system_events_CompileExpressionsMicroseconds_inc` `DGAUGE`
`ch_system_events_CompileExpressionsMicroseconds_rate` `DGAUGE`
`ch_system_events_CompileFunction_inc` `DGAUGE`
`ch_system_events_CompileFunction_rate` `DGAUGE`
`ch_system_events_CompressedReadBufferBlocks_inc` `DGAUGE`
`ch_system_events_CompressedReadBufferBlocks_rate` `DGAUGE`
`ch_system_events_CompressedReadBufferBytes_inc` `DGAUGE`
`ch_system_events_CompressedReadBufferBytes_rate` `DGAUGE`
`ch_system_events_ContextLock_inc` `DGAUGE`
`ch_system_events_ContextLock_rate` `DGAUGE`
`ch_system_events_ContextLockWaitMicroseconds_inc` `DGAUGE`
`ch_system_events_ContextLockWaitMicroseconds_rate` `DGAUGE`
`ch_system_events_CreatedReadBufferOrdinary_inc` `DGAUGE`
`ch_system_events_CreatedReadBufferOrdinary_rate` `DGAUGE`
`ch_system_events_DiskReadElapsedMicroseconds_inc` `DGAUGE`
`ch_system_events_DiskReadElapsedMicroseconds_rate` `DGAUGE`
`ch_system_events_DiskS3DeleteObjects_inc` `DGAUGE`
`ch_system_events_DiskS3DeleteObjects_rate` `DGAUGE`
`ch_system_events_DiskS3GetObject_inc` `DGAUGE`
`ch_system_events_DiskS3GetObject_rate` `DGAUGE`
`ch_system_events_DiskS3PutObject_inc` `DGAUGE`
`ch_system_events_DiskS3PutObject_rate` `DGAUGE`
`ch_system_events_DiskS3ReadMicroseconds_inc` `DGAUGE`
`ch_system_events_DiskS3ReadMicroseconds_rate` `DGAUGE`
`ch_system_events_DiskS3ReadRequestsCount_inc` `DGAUGE`
`ch_system_events_DiskS3ReadRequestsCount_rate` `DGAUGE`
`ch_system_events_DiskS3WriteMicroseconds_inc` `DGAUGE`
`ch_system_events_DiskS3WriteMicroseconds_rate` `DGAUGE`
`ch_system_events_DiskS3WriteRequestsCount_inc` `DGAUGE`
`ch_system_events_DiskS3WriteRequestsCount_rate` `DGAUGE`
`ch_system_events_DiskWriteElapsedMicroseconds_inc` `DGAUGE`
`ch_system_events_DiskWriteElapsedMicroseconds_rate` `DGAUGE`
`ch_system_events_FailedInsertQuery_inc` `DGAUGE`
`ch_system_events_FailedInsertQuery_rate` `DGAUGE`
`ch_system_events_FailedQuery_inc` `DGAUGE`
`ch_system_events_FailedQuery_rate` `DGAUGE`
`ch_system_events_FailedSelectQuery_inc` `DGAUGE`
`ch_system_events_FailedSelectQuery_rate` `DGAUGE`
`ch_system_events_FileOpen_inc` `DGAUGE`
`ch_system_events_FileOpen_rate` `DGAUGE`
`ch_system_events_FileSync_inc` `DGAUGE`
`ch_system_events_FileSync_rate` `DGAUGE`
`ch_system_events_FileSyncElapsedMicroseconds_inc` `DGAUGE`
`ch_system_events_FileSyncElapsedMicroseconds_rate` `DGAUGE`
`ch_system_events_FunctionExecute_inc` `DGAUGE`
`ch_system_events_FunctionExecute_rate` `DGAUGE`
`ch_system_events_HardPageFaults_inc` `DGAUGE`
`ch_system_events_HardPageFaults_rate` `DGAUGE`
`ch_system_events_IOBufferAllocBytes_inc` `DGAUGE`
`ch_system_events_IOBufferAllocBytes_rate` `DGAUGE`
`ch_system_events_IOBufferAllocs_inc` `DGAUGE`
`ch_system_events_IOBufferAllocs_rate` `DGAUGE`
`ch_system_events_LoadedMarksCount_inc` `DGAUGE`
`ch_system_events_LoadedMarksCount_rate` `DGAUGE`
`ch_system_events_LoadedMarksMemoryBytes_inc` `DGAUGE`
`ch_system_events_LoadedMarksMemoryBytes_rate` `DGAUGE`
`ch_system_events_LogDebug_inc` `DGAUGE`
`ch_system_events_LogDebug_rate` `DGAUGE`
`ch_system_events_LogError_inc` `DGAUGE`
`ch_system_events_LogError_rate` `DGAUGE`
`ch_system_events_LogInfo_inc` `DGAUGE`
`ch_system_events_LogInfo_rate` `DGAUGE`
`ch_system_events_LogWarning_inc` `DGAUGE`
`ch_system_events_LogWarning_rate` `DGAUGE`
`ch_system_events_InsertQueryTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_InsertQueryTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_InsertQuery_inc` `DGAUGE`
`ch_system_events_InsertQuery_rate` `DGAUGE`
`ch_system_events_InsertedBytes_inc` `DGAUGE`
`ch_system_events_InsertedCompactParts_inc` `DGAUGE`
`ch_system_events_InsertedCompactParts_rate` `DGAUGE`
`ch_system_events_InsertedBytes_rate` `DGAUGE`
`ch_system_events_InsertedRows_inc` `DGAUGE`
`ch_system_events_InsertedRows_rate` `DGAUGE`
`ch_system_events_MainConfigLoads_inc` `DGAUGE`
`ch_system_events_MainConfigLoads_rate` `DGAUGE`
`ch_system_events_MergeTreeDataWriterBlocksAlreadySorted_inc` `DGAUGE`
`ch_system_events_MergeTreeDataWriterBlocksAlreadySorted_rate` `DGAUGE`
`ch_system_events_MergeTreeDataWriterBlocks_inc` `DGAUGE`
`ch_system_events_MergeTreeDataWriterBlocks_rate` `DGAUGE`
`ch_system_events_MergeTreeDataWriterCompressedBytes_inc` `DGAUGE`
`ch_system_events_MergeTreeDataWriterCompressedBytes_rate` `DGAUGE`
`ch_system_events_MergeTreeDataWriterRows_inc` `DGAUGE`
`ch_system_events_MergeTreeDataWriterRows_rate` `DGAUGE`
`ch_system_events_MergeTreeDataWriterUncompressedBytes_inc` `DGAUGE`
`ch_system_events_MergeTreeDataWriterUncompressedBytes_rate` `DGAUGE`
`ch_system_events_Merge_inc` `DGAUGE`
`ch_system_events_Merge_rate` `DGAUGE`
`ch_system_events_MergedIntoCompactParts_inc` `DGAUGE`
`ch_system_events_MergedIntoCompactParts_rate` `DGAUGE`
`ch_system_events_MergedRows_inc` `DGAUGE`
`ch_system_events_MergedRows_rate` `DGAUGE`
`ch_system_events_MergedUncompressedBytes_inc` `DGAUGE`
`ch_system_events_MergedUncompressedBytes_rate` `DGAUGE`
`ch_system_events_MergesTimeMilliseconds_inc` `DGAUGE`
`ch_system_events_MergesTimeMilliseconds_rate` `DGAUGE`
`ch_system_events_NetworkReceiveBytes_inc` `DGAUGE`
`ch_system_events_NetworkReceiveBytes_rate` `DGAUGE`
`ch_system_events_NetworkReceiveElapsedMicroseconds_inc` `DGAUGE`
`ch_system_events_NetworkReceiveElapsedMicroseconds_rate` `DGAUGE`
`ch_system_events_NetworkSendBytes_inc` `DGAUGE`
`ch_system_events_NetworkSendBytes_rate` `DGAUGE`
`ch_system_events_NetworkSendElapsedMicroseconds_inc` `DGAUGE`
`ch_system_events_NetworkSendElapsedMicroseconds_rate` `DGAUGE`
`ch_system_events_OSCPUVirtualTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_OSCPUVirtualTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_OSCPUWaitMicroseconds_inc` `DGAUGE`
`ch_system_events_OSCPUWaitMicroseconds_rate` `DGAUGE`
`ch_system_events_OSIOWaitMicroseconds_inc` `DGAUGE`
`ch_system_events_OSIOWaitMicroseconds_rate` `DGAUGE`
`ch_system_events_OSReadBytes_inc` `DGAUGE`
`ch_system_events_OSReadBytes_rate` `DGAUGE`
`ch_system_events_OSReadChars_inc` `DGAUGE`
`ch_system_events_OSReadChars_rate` `DGAUGE`
`ch_system_events_OSWriteBytes_inc` `DGAUGE`
`ch_system_events_OSWriteBytes_rate` `DGAUGE`
`ch_system_events_OSWriteChars_inc` `DGAUGE`
`ch_system_events_OSWriteChars_rate` `DGAUGE`
`ch_system_events_OtherQueryTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_OtherQueryTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_PartsLockHoldMicroseconds_inc` `DGAUGE`
`ch_system_events_PartsLockHoldMicroseconds_rate` `DGAUGE`
`ch_system_events_PartsLockWaitMicroseconds_inc` `DGAUGE`
`ch_system_events_PartsLockWaitMicroseconds_rate` `DGAUGE`
`ch_system_events_QueriesWithSubqueries_inc` `DGAUGE`
`ch_system_events_QueriesWithSubqueries_rate` `DGAUGE`
`ch_system_events_OpenedFileCacheHits_inc` `DGAUGE`
`ch_system_events_OpenedFileCacheHits_rate` `DGAUGE`
`ch_system_events_OpenedFileCacheMisses_inc` `DGAUGE`
`ch_system_events_OpenedFileCacheMisses_rate` `DGAUGE`
`ch_system_events_QueryProfilerRuns_inc` `DGAUGE`
`ch_system_events_QueryProfilerRuns_rate` `DGAUGE`
`ch_system_events_QueryTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_QueryTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_Query_inc` `DGAUGE`
`ch_system_events_Query_rate` `DGAUGE`
`ch_system_events_RWLockAcquiredReadLocks_inc` `DGAUGE`
`ch_system_events_RWLockAcquiredReadLocks_rate` `DGAUGE`
`ch_system_events_RWLockReadersWaitMilliseconds_inc` `DGAUGE`
`ch_system_events_RWLockReadersWaitMilliseconds_rate` `DGAUGE`
`ch_system_events_S3DeleteObjects_inc` `DGAUGE`
`ch_system_events_S3DeleteObjects_rate` `DGAUGE`
`ch_system_events_S3GetObject_inc` `DGAUGE`
`ch_system_events_S3GetObject_rate` `DGAUGE`
`ch_system_events_S3PutObject_inc` `DGAUGE`
`ch_system_events_S3PutObject_rate` `DGAUGE`
`ch_system_events_S3ReadMicroseconds_inc` `DGAUGE`
`ch_system_events_S3ReadMicroseconds_rate` `DGAUGE`
`ch_system_events_S3ReadRequestsCount_inc` `DGAUGE`
`ch_system_events_S3ReadRequestsCount_rate` `DGAUGE`
`ch_system_events_S3WriteMicroseconds_inc` `DGAUGE`
`ch_system_events_S3WriteMicroseconds_rate` `DGAUGE`
`ch_system_events_S3WriteRequestsCount_inc` `DGAUGE`
`ch_system_events_S3WriteRequestsCount_rate` `DGAUGE`
`ch_system_events_ReadBufferFromFileDescriptorReadBytes_inc` `DGAUGE`
`ch_system_events_ReadBufferFromFileDescriptorReadBytes_rate` `DGAUGE`
`ch_system_events_ReadBufferFromS3Bytes_inc` `DGAUGE`
`ch_system_events_ReadBufferFromS3Bytes_rate` `DGAUGE`
`ch_system_events_ReadBufferFromS3InitMicroseconds_inc` `DGAUGE`
`ch_system_events_ReadBufferFromS3InitMicroseconds_rate` `DGAUGE`
`ch_system_events_ReadBufferFromS3Microseconds_inc` `DGAUGE`
`ch_system_events_ReadBufferFromS3Microseconds_rate` `DGAUGE`
`ch_system_events_ReadBufferFromS3PreservedSessions_inc` `DGAUGE`
`ch_system_events_ReadBufferFromS3PreservedSessions_rate` `DGAUGE`
`ch_system_events_ReadBufferFromFileDescriptorRead_inc` `DGAUGE`
`ch_system_events_ReadBufferFromFileDescriptorRead_rate` `DGAUGE`
`ch_system_events_ReadCompressedBytes_inc` `DGAUGE`
`ch_system_events_ReadCompressedBytes_rate` `DGAUGE`
`ch_system_events_RealTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_RealTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_RegexpCreated_inc` `DGAUGE`
`ch_system_events_RegexpCreated_rate` `DGAUGE`
`ch_system_events_RemoteFSBuffers_inc` `DGAUGE`
`ch_system_events_RemoteFSBuffers_rate` `DGAUGE`
`ch_system_events_RemoteFSSeeks_inc` `DGAUGE`
`ch_system_events_RemoteFSSeeks_rate` `DGAUGE`
`ch_system_events_RemoteFSSeeksWithReset_inc` `DGAUGE`
`ch_system_events_RemoteFSSeeksWithReset_rate` `DGAUGE`
`ch_system_events_RemoteFSUnprefetchedBytes_inc` `DGAUGE`
`ch_system_events_RemoteFSUnprefetchedBytes_rate` `DGAUGE`
`ch_system_events_RemoteFSUnprefetchedReads_inc` `DGAUGE`
`ch_system_events_RemoteFSUnprefetchedReads_rate` `DGAUGE`
`ch_system_events_Seek_inc` `DGAUGE`
`ch_system_events_Seek_rate` `DGAUGE`
`ch_system_events_SelectQueryTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_SelectQueryTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_ServerStartupMilliseconds_inc` `DGAUGE`
`ch_system_events_ServerStartupMilliseconds_rate` `DGAUGE`
`ch_system_events_SelectQuery_inc` `DGAUGE`
`ch_system_events_SelectQuery_rate` `DGAUGE`
`ch_system_events_SelectedBytes_inc` `DGAUGE`
`ch_system_events_SelectedBytes_rate` `DGAUGE`
`ch_system_events_SelectedRows_inc` `DGAUGE`
`ch_system_events_SelectedRows_rate` `DGAUGE`
`ch_system_events_SelectQueriesWithSubqueries_inc` `DGAUGE`
`ch_system_events_SelectQueriesWithSubqueries_rate` `DGAUGE`
`ch_system_events_SoftPageFaults_inc` `DGAUGE`
`ch_system_events_SoftPageFaults_rate` `DGAUGE`
`ch_system_events_SynchronousRemoteReadWaitMicroseconds_inc` `DGAUGE`
`ch_system_events_SynchronousRemoteReadWaitMicroseconds_rate` `DGAUGE`
`ch_system_events_SystemTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_SystemTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_UserTimeMicroseconds_inc` `DGAUGE`
`ch_system_events_UserTimeMicroseconds_rate` `DGAUGE`
`ch_system_events_WaitMarksLoadMicroseconds_inc` `DGAUGE`
`ch_system_events_WaitMarksLoadMicroseconds_rate` `DGAUGE`
`ch_system_events_WriteBufferFromFileDescriptorWrite_inc` `DGAUGE`
`ch_system_events_WriteBufferFromFileDescriptorWrite_rate` `DGAUGE`
`ch_system_events_WriteBufferFromFileDescriptorWriteBytes_inc` `DGAUGE`
`ch_system_events_WriteBufferFromFileDescriptorWriteBytes_rate` `DGAUGE`
`ch_system_events_WriteBufferFromS3Bytes_inc` `DGAUGE`
`ch_system_events_WriteBufferFromS3Bytes_rate` `DGAUGE`
`ch_system_events_WriteBufferFromS3Microseconds_inc` `DGAUGE`
`ch_system_events_WriteBufferFromS3Microseconds_rate` `DGAUGE`

Current event metrics

These are ClickHouse® native metrics from the system.metrics table.

Name Type
`ch_system_metrics_ActiveTimersInQueryProfiler` `DGAUGE`
`ch_system_metrics_AggregatorThreads` `DGAUGE`
`ch_system_metrics_AggregatorThreadsActive` `DGAUGE`
`ch_system_metrics_AsynchronousInsertThreads` `DGAUGE`
`ch_system_metrics_AsynchronousInsertThreadsActive` `DGAUGE`
`ch_system_metrics_AsynchronousReadWait` `DGAUGE`
`ch_system_metrics_AsyncInsertCacheSize` `DGAUGE`
`ch_system_metrics_BackgroundBufferFlushSchedulePoolSize` `DGAUGE`
`ch_system_metrics_BackgroundBufferFlushSchedulePoolTask` `DGAUGE`
`ch_system_metrics_BackgroundCommonPoolSize` `DGAUGE`
`ch_system_metrics_BackgroundCommonPoolTask` `DGAUGE`
`ch_system_metrics_BackgroundDistributedSchedulePoolSize` `DGAUGE`
`ch_system_metrics_BackgroundDistributedSchedulePoolTask` `DGAUGE`
`ch_system_metrics_BackgroundFetchesPoolSize` `DGAUGE`
`ch_system_metrics_BackgroundFetchesPoolTask` `DGAUGE`
`ch_system_metrics_BackgroundMergesAndMutationsPoolSize` `DGAUGE`
`ch_system_metrics_BackgroundMergesAndMutationsPoolTask` `DGAUGE`
`ch_system_metrics_BackgroundMessageBrokerSchedulePoolSize` `DGAUGE`
`ch_system_metrics_BackgroundMessageBrokerSchedulePoolTask` `DGAUGE`
`ch_system_metrics_BackgroundMovePoolSize` `DGAUGE`
`ch_system_metrics_BackgroundMovePoolTask` `DGAUGE`
`ch_system_metrics_BackgroundSchedulePoolSize` `DGAUGE`
`ch_system_metrics_BackgroundSchedulePoolTask` `DGAUGE`
`ch_system_metrics_BackgroundSchedulePoolTask` `DGAUGE`
`ch_system_metrics_BackupsIOThreads` `DGAUGE`
`ch_system_metrics_BackupsIOThreadsActive` `DGAUGE`
`ch_system_metrics_BackupsThreads` `DGAUGE`
`ch_system_metrics_BackupsThreadsActive` `DGAUGE`
`ch_system_metrics_BrokenDistributedFilesToInsert` `DGAUGE`
`ch_system_metrics_BrokenDistributedFilesToInsert` `DGAUGE`
`ch_system_metrics_CacheDetachedFileSegments` `DGAUGE`
`ch_system_metrics_CacheDictionaryThreads` `DGAUGE`
`ch_system_metrics_CacheDictionaryThreadsActive` `DGAUGE`
`ch_system_metrics_CacheDictionaryUpdateQueueBatches` `DGAUGE`
`ch_system_metrics_CacheDictionaryUpdateQueueKeys` `DGAUGE`
`ch_system_metrics_CacheFileSegments` `DGAUGE`
`ch_system_metrics_Connection` `DGAUGE`
`ch_system_metrics_ContextLockWait` `DGAUGE`
`ch_system_metrics_CreatedTimersInQueryProfiler` `DGAUGE`
`ch_system_metrics_DatabaseCatalogThreads` `DGAUGE`
`ch_system_metrics_DatabaseCatalogThreadsActive` `DGAUGE`
`ch_system_metrics_DatabaseOnDiskThreads` `DGAUGE`
`ch_system_metrics_DatabaseOnDiskThreadsActive` `DGAUGE`
`ch_system_metrics_DatabaseOrdinaryThreads` `DGAUGE`
`ch_system_metrics_DatabaseOrdinaryThreadsActive` `DGAUGE`
`ch_system_metrics_DDLWorkerThreads` `DGAUGE`
`ch_system_metrics_DDLWorkerThreadsActive` `DGAUGE`
`ch_system_metrics_DelayedInserts` `DGAUGE`
`ch_system_metrics_DestroyAggregatesThreads` `DGAUGE`
`ch_system_metrics_DestroyAggregatesThreadsActive` `DGAUGE`
`ch_system_metrics_DictCacheRequests` `DGAUGE`
`ch_system_metrics_DiskObjectStorageAsyncThreads` `DGAUGE`
`ch_system_metrics_DiskObjectStorageAsyncThreadsActive` `DGAUGE`
`ch_system_metrics_DiskSpaceReservedForMerge` `DGAUGE`
`ch_system_metrics_DistributedBytesToInsert` `DGAUGE`
`ch_system_metrics_DistributedFilesToInsert` `DGAUGE`
`ch_system_metrics_DistributedInsertThreads` `DGAUGE`
`ch_system_metrics_DistributedInsertThreadsActive` `DGAUGE`
`ch_system_metrics_DistributedSend` `DGAUGE`
`ch_system_metrics_EphemeralNode` `DGAUGE`
`ch_system_metrics_FilesystemCacheDelayedCleanupElements` `DGAUGE`
`ch_system_metrics_FilesystemCacheDownloadQueueElements` `DGAUGE`
`ch_system_metrics_FilesystemCacheElements` `DGAUGE`
`ch_system_metrics_FilesystemCacheReadBuffers` `DGAUGE`
`ch_system_metrics_FilesystemCacheSize` `DGAUGE`
`ch_system_metrics_FilesystemCacheSizeLimit` `DGAUGE`
`ch_system_metrics_GlobalThread` `DGAUGE`
`ch_system_metrics_GlobalThreadActive` `DGAUGE`
`ch_system_metrics_HashedDictionaryThreads` `DGAUGE`
`ch_system_metrics_HashedDictionaryThreadsActive` `DGAUGE`
`ch_system_metrics_HTTPConnection` `DGAUGE`
`ch_system_metrics_IDiskCopierThreads` `DGAUGE`
`ch_system_metrics_IDiskCopierThreadsActive` `DGAUGE`
`ch_system_metrics_InterserverConnection` `DGAUGE`
`ch_system_metrics_IOPrefetchThreads` `DGAUGE`
`ch_system_metrics_IOPrefetchThreadsActive` `DGAUGE`
`ch_system_metrics_IOThreads` `DGAUGE`
`ch_system_metrics_IOThreadsActive` `DGAUGE`
`ch_system_metrics_IOUringInFlightEvents` `DGAUGE`
`ch_system_metrics_IOUringPendingEvents` `DGAUGE`
`ch_system_metrics_IOWriterThreads` `DGAUGE`
`ch_system_metrics_IOWriterThreadsActive` `DGAUGE`
`ch_system_metrics_KafkaAssignedPartitions` `DGAUGE`
`ch_system_metrics_KafkaBackgroundReads` `DGAUGE`
`ch_system_metrics_KafkaConsumers` `DGAUGE`
`ch_system_metrics_KafkaConsumersInUse` `DGAUGE`
`ch_system_metrics_KafkaConsumersWithAssignment` `DGAUGE`
`ch_system_metrics_KafkaLibrdkafkaThreads` `DGAUGE`
`ch_system_metrics_KafkaProducers` `DGAUGE`
`ch_system_metrics_KafkaWrites` `DGAUGE`
`ch_system_metrics_KeeperAliveConnections` `DGAUGE`
`ch_system_metrics_KeeperOutstandingRequets` `DGAUGE`
`ch_system_metrics_LocalThread` `DGAUGE`
`ch_system_metrics_LocalThreadActive` `DGAUGE`
`ch_system_metrics_MarksLoaderThreads` `DGAUGE`
`ch_system_metrics_MarksLoaderThreadsActive` `DGAUGE`
`ch_system_metrics_MaxDDLEntryID` `DGAUGE`
`ch_system_metrics_MaxPushedDDLEntryID` `DGAUGE`
`ch_system_metrics_MemoryTracking` `DGAUGE`
`ch_system_metrics_Merge` `DGAUGE`
`ch_system_metrics_MergesMutationsMemoryTracking` `DGAUGE`
`ch_system_metrics_MergeTreeAllRangesAnnouncementsSent` `DGAUGE`
`ch_system_metrics_MergeTreeBackgroundExecutorThreads` `DGAUGE`
`ch_system_metrics_MergeTreeBackgroundExecutorThreadsActive` `DGAUGE`
`ch_system_metrics_MergeTreeDataSelectExecutorThreads` `DGAUGE`
`ch_system_metrics_MergeTreeDataSelectExecutorThreadsActive` `DGAUGE`
`ch_system_metrics_MergeTreeOutdatedPartsLoaderThreads` `DGAUGE`
`ch_system_metrics_MergeTreeOutdatedPartsLoaderThreadsActive` `DGAUGE`
`ch_system_metrics_MergeTreePartsCleanerThreads` `DGAUGE`
`ch_system_metrics_MergeTreePartsCleanerThreadsActive` `DGAUGE`
`ch_system_metrics_MergeTreePartsLoaderThreads` `DGAUGE`
`ch_system_metrics_MergeTreePartsLoaderThreadsActive` `DGAUGE`
`ch_system_metrics_MergeTreeReadTaskRequestsSent` `DGAUGE`
`ch_system_metrics_MMappedAllocBytes` `DGAUGE`
`ch_system_metrics_MMappedAllocs` `DGAUGE`
`ch_system_metrics_MMappedFileBytes` `DGAUGE`
`ch_system_metrics_MMappedFiles` `DGAUGE`
`ch_system_metrics_Move` `DGAUGE`
`ch_system_metrics_MySQLConnection` `DGAUGE`
`ch_system_metrics_NetworkReceive` `DGAUGE`
`ch_system_metrics_NetworkSend` `DGAUGE`
`ch_system_metrics_ObjectStorageAzureThreads` `DGAUGE`
`ch_system_metrics_ObjectStorageAzureThreadsActive` `DGAUGE`
`ch_system_metrics_ObjectStorageS3Threads` `DGAUGE`
`ch_system_metrics_ObjectStorageS3ThreadsActive` `DGAUGE`
`ch_system_metrics_OpenFileForRead` `DGAUGE`
`ch_system_metrics_OpenFileForWrite` `DGAUGE`
`ch_system_metrics_OutdatedPartsLoadingThreads` `DGAUGE`
`ch_system_metrics_OutdatedPartsLoadingThreadsActive` `DGAUGE`
`ch_system_metrics_ParallelFormattingOutputFormatThreads` `DGAUGE`
`ch_system_metrics_ParallelFormattingOutputFormatThreadsActive` `DGAUGE`
`ch_system_metrics_ParallelParsingInputFormatThreads` `DGAUGE`
`ch_system_metrics_ParallelParsingInputFormatThreadsActive` `DGAUGE`
`ch_system_metrics_ParquetDecoderThreads` `DGAUGE`
`ch_system_metrics_ParquetDecoderThreadsActive` `DGAUGE`
`ch_system_metrics_ParquetEncoderThreads` `DGAUGE`
`ch_system_metrics_ParquetEncoderThreadsActive` `DGAUGE`
`ch_system_metrics_PartMutation` `DGAUGE`
`ch_system_metrics_PartsActive` `DGAUGE`
`ch_system_metrics_PartsCommitted` `DGAUGE`
`ch_system_metrics_PartsCompact` `DGAUGE`
`ch_system_metrics_PartsDeleteOnDestroy` `DGAUGE`
`ch_system_metrics_PartsDeleting` `DGAUGE`
`ch_system_metrics_PartsInMemory` `DGAUGE`
`ch_system_metrics_PartsOutdated` `DGAUGE`
`ch_system_metrics_PartsPreActive` `DGAUGE`
`ch_system_metrics_PartsPreCommitted` `DGAUGE`
`ch_system_metrics_PartsTemporary` `DGAUGE`
`ch_system_metrics_PartsWide` `DGAUGE`
`ch_system_metrics_PendingAsyncInsert` `DGAUGE`
`ch_system_metrics_PostgreSQLConnection` `DGAUGE`
`ch_system_metrics_Query` `DGAUGE`
`ch_system_metrics_QueryPipelineExecutorThreads` `DGAUGE`
`ch_system_metrics_QueryPipelineExecutorThreadsActive` `DGAUGE`
`ch_system_metrics_QueryPreempted` `DGAUGE`
`ch_system_metrics_QueryThread` `DGAUGE`
`ch_system_metrics_Read` `DGAUGE`
`ch_system_metrics_ReadonlyReplica` `DGAUGE`
`ch_system_metrics_ReadTaskRequestsSent` `DGAUGE`
`ch_system_metrics_RemoteRead` `DGAUGE`
`ch_system_metrics_ReplicatedChecks` `DGAUGE`
`ch_system_metrics_ReplicatedFetch` `DGAUGE`
`ch_system_metrics_ReplicatedSend` `DGAUGE`
`ch_system_metrics_RestartReplicaThreads` `DGAUGE`
`ch_system_metrics_RestartReplicaThreadsActive` `DGAUGE`
`ch_system_metrics_RestoreThreads` `DGAUGE`
`ch_system_metrics_RestoreThreadsActive` `DGAUGE`
`ch_system_metrics_Revision` `DGAUGE`
`ch_system_metrics_RWLockActiveReaders` `DGAUGE`
`ch_system_metrics_RWLockActiveTotal` `DGAUGE`
`ch_system_metrics_RWLockActiveWriters` `DGAUGE`
`ch_system_metrics_RWLockWaitingReaders` `DGAUGE`
`ch_system_metrics_RWLockWaitingTotal` `DGAUGE`
`ch_system_metrics_RWLockWaitingWriters` `DGAUGE`
`ch_system_metrics_S3Requests` `DGAUGE`
`ch_system_metrics_SendExternalTables` `DGAUGE`
`ch_system_metrics_SendScalars` `DGAUGE`
`ch_system_metrics_StartupSystemTablesThreads` `DGAUGE`
`ch_system_metrics_StartupSystemTablesThreadsActive` `DGAUGE`
`ch_system_metrics_StorageBufferBytes` `DGAUGE`
`ch_system_metrics_StorageBufferRows` `DGAUGE`
`ch_system_metrics_StorageDistributedThreads` `DGAUGE`
`ch_system_metrics_StorageDistributedThreadsActive` `DGAUGE`
`ch_system_metrics_StorageHiveThreads` `DGAUGE`
`ch_system_metrics_StorageHiveThreadsActive` `DGAUGE`
`ch_system_metrics_StorageS3Threads` `DGAUGE`
`ch_system_metrics_StorageS3ThreadsActive` `DGAUGE`
`ch_system_metrics_SystemReplicasThreads` `DGAUGE`
`ch_system_metrics_SystemReplicasThreadsActive` `DGAUGE`
`ch_system_metrics_TablesLoaderThreads` `DGAUGE`
`ch_system_metrics_TablesLoaderThreadsActive` `DGAUGE`
`ch_system_metrics_TablesToDropQueueSize` `DGAUGE`
`ch_system_metrics_TCPConnection` `DGAUGE`
`ch_system_metrics_TemporaryFilesForAggregation` `DGAUGE`
`ch_system_metrics_TemporaryFilesForJoin` `DGAUGE`
`ch_system_metrics_TemporaryFilesForSort` `DGAUGE`
`ch_system_metrics_TemporaryFilesUnknown` `DGAUGE`
`ch_system_metrics_ThreadPoolFSReaderThreads` `DGAUGE`
`ch_system_metrics_ThreadPoolFSReaderThreadsActive` `DGAUGE`
`ch_system_metrics_ThreadPoolRemoteFSReaderThreads` `DGAUGE`
`ch_system_metrics_ThreadPoolRemoteFSReaderThreadsActive` `DGAUGE`
`ch_system_metrics_ThreadsInOvercommitTracker` `DGAUGE`
`ch_system_metrics_TotalTemporaryFiles` `DGAUGE`
`ch_system_metrics_VersionInteger` `DGAUGE`
`ch_system_metrics_Write` `DGAUGE`
`ch_system_metrics_ZooKeeperRequest` `DGAUGE`
`ch_system_metrics_ZooKeeperSession` `DGAUGE`
`ch_system_metrics_ZooKeeperWatch` `DGAUGE`

Query queue metrics

These are ClickHouse® native metrics from the system.query_log table.
For each metric, the increment per unit of time (second) is calculated.

Name Type
`ch_system_query_log_insert_requests_inc` `DGAUGE`
`ch_system_query_log_read_bytes_inc` `DGAUGE`
`ch_system_query_log_read_rows_inc` `DGAUGE`
`ch_system_query_log_requests_inc` `DGAUGE`
`ch_system_query_log_result_bytes_inc` `DGAUGE`
`ch_system_query_log_result_rows_inc` `DGAUGE`
`ch_system_query_log_select_requests_inc` `DGAUGE`
`ch_system_query_log_written_bytes_inc` `DGAUGE`
`ch_system_query_log_written_rows_inc` `DGAUGE`

Replication metrics

Name Type, units	Description
`ch_replication-future_parts` `DGAUGE`, count	Number of data parts after the `MERGE` and `INSERT` operations
`ch_replication-inserts_in_queue` `DGAUGE`, count	Number of data parts enqueued for insert
`ch_replication-is_alive` `DGAUGE`, 0/1	Replication performance indicator. It can be either `1` if DB replication is alive or `0` if it is not.
`ch_replication-max_absolute_delay` `DGAUGE`, seconds	Maximum replication delay
`ch_replication-merges_in_queue` `DGAUGE`, count	Number of merges enqueued
`ch_replication-parts_to_check` `DGAUGE`, count	Number of data parts to check
`ch_replication-queue_size` `DGAUGE`, count	Merge and insert queue size
`ch_replication-tables` `DGAUGE`, count	Number of replicated tables

System metrics

Name Type, units	Description
`ch_config_merge_tree_parts_to_throw_insert` `DGAUGE`, count	Threshold for active table data parts, which, when surpassed, causes ClickHouse® to throw a `Too many parts ...` exception. It is specified in the settings. It makes sense to analyze it along with the `ch_system_async_metrics_MaxPartCountForPartition` metric.
`ch_local_disk_parts_size` `DGAUGE`, bytes	Local disk partition size
`ch_system_async_metrics_MaxPartCountForPartition` `DGAUGE`, count	Maximum number of data parts per partition
`ch_system_async_metrics_NumberOfDatabases` `DGAUGE`, count	Total databases on the server
`ch_system_async_metrics_NumberOfTables` `DGAUGE`, count	Total tables across all databases on the server, excluding those DBs that cannot contain MergeTree tables. Excluded database engines are those that generate tables dynamically, such as Lazy, MySQL®, PostgreSQL, and SQLite.
`ch_system_async_metrics_NumberOfTablesSystem` `DGAUGE`, count	Total system database tables stored as MergeTree tables on the server
`ch_system_async_metrics_ReplicasMaxAbsoluteDelay` `DGAUGE`, seconds	Maximum replication delay
`ch_system_async_metrics_ReplicasMaxInsertsInQueue` `DGAUGE`, count	Maximum number of queued `INSERT` operations (to replicate) in replicated tables
`ch_system_async_metrics_ReplicasMaxMergesInQueue` `DGAUGE`, count	Maximum number of queued `MERGE` operations (to apply) for replicated tables
`ch_system_async_metrics_ReplicasMaxQueueSize` `DGAUGE`, count	Maximum replication queue size
`ch_system_async_metrics_ReplicasMaxRelativeDelay` `DGAUGE`, seconds	Maximum lag difference between a replica and the most delayed replica of the same table across replicated tables
`ch_system_async_metrics_ReplicasSumInsertsInQueue` `DGAUGE`, count	Total queued `INSERT` operations (to replicate) across replicated tables
`ch_system_async_metrics_ReplicasSumMergesInQueue` `DGAUGE`, count	Total queued `MERGE` operations (to apply) across replicated tables
`ch_system_async_metrics_ReplicasSumQueueSize` `DGAUGE`, bytes	Total queued operations, e.g., `FETCH` and `MERGE`, across replicated tables
`ch_system_async_metrics_TotalBytesOfMergeTreeTables` `DGAUGE`, bytes	Total compressed bytes (including data and indexes) across all MergeTree tables
`ch_system_async_metrics_TotalBytesOfMergeTreeTablesSystem` `DGAUGE`, bytes	Total compressed bytes (including data and indexes) in MergeTree tables within the system database
`ch_system_async_metrics_TotalPartsOfMergeTreeTables` `DGAUGE`, count	Total data parts across all MergeTree tables. Counts above 10,000 will adversely affect server startup time and may indicate a bad choice of partition key.
`ch_system_async_metrics_TotalPartsOfMergeTreeTablesSystem` `DGAUGE`, count	Total data parts in MergeTree tables within the system database
`ch_system_async_metrics_TotalRowsOfMergeTreeTables` `DGAUGE`, count	Total rows (entries) across all MergeTree tables
`ch_system_async_metrics_TotalRowsOfMergeTreeTablesSystem` `DGAUGE`, count	Total rows (records) in MergeTree tables within the system database
`ch_system_async_metrics_Uptime` `DGAUGE`, seconds	Server uptime (in seconds), which includes the time used to initialize the server before it starts accepting connections.

Other metrics

Name Type, units	Description
`can_read` `DGAUGE`, 0/1	Host read access indicator. `1` if the host service is available for reads, `0` if not.
`can_write` `DGAUGE`, 0/1	Host write access indicator. `1` if the host service is available for writes, `0` if not.
`is_alive` `DGAUGE`, 0/1	Host health indicator. It can be either `1` if a DB host is healthy or `0` if it is not.

For more information, see Monitoring the state of a ClickHouse® cluster and its hosts.

ClickHouse® is a registered trademark of ClickHouse, Inc.

Yandex Monitoring metric reference

CPU metricsCPU metrics

Disk metricsDisk metrics

Disk operation metricsDisk operation metrics

RAM metricsRAM metrics

Network metricsNetwork metrics

Service metricsService metrics

System event metricsSystem event metrics

Current event metricsCurrent event metrics

Query queue metricsQuery queue metrics

Replication metricsReplication metrics

System metricsSystem metrics

Other metricsOther metrics

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