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### jemalloc.prof.active[​](#jemallocprofactive "Direct link to jemalloc.prof.active")

An internal metric of the low-level memory allocator (jemalloc). See <https://jemalloc.net/jemalloc.3.html>

**See Also**

- [Monitoring](/docs/operations/monitoring) — Base concepts of ClickHouse monitoring.
- [system.metrics](/docs/operations/system-tables/metrics) — Contains instantly calculated metrics.
- [system.events](/docs/operations/system-tables/events) — Contains a number of events that have occurred.
- [system.metric\_log](/docs/operations/system-tables/metric_log) — Contains a history of metrics values from tables `system.metrics` and `system.events`.

- [Metric descriptions](#metric-descriptions)
  - [AsynchronousHeavyMetricsCalculationTimeSpent](#asynchronousheavymetricscalculationtimespent)- [AsynchronousHeavyMetricsUpdateInterval](#asynchronousheavymetricsupdateinterval)- [AsynchronousMetricsCalculationTimeSpent](#asynchronousmetricscalculationtimespent)- [AsynchronousMetricsUpdateInterval](#asynchronousmetricsupdateinterval)- [BlockActiveTime\_*name*](#blockactivetime_name)- [BlockDiscardBytes\_*name*](#blockdiscardbytes_name)- [BlockDiscardMerges\_*name*](#blockdiscardmerges_name)- [BlockDiscardOps\_*name*](#blockdiscardops_name)- [BlockDiscardTime\_*name*](#blockdiscardtime_name)- [BlockInFlightOps\_*name*](#blockinflightops_name)- [BlockQueueTime\_*name*](#blockqueuetime_name)- [BlockReadBytes\_*name*](#blockreadbytes_name)- [BlockReadMerges\_*name*](#blockreadmerges_name)- [BlockReadOps\_*name*](#blockreadops_name)- [BlockReadTime\_*name*](#blockreadtime_name)- [BlockWriteBytes\_*name*](#blockwritebytes_name)- [BlockWriteMerges\_*name*](#blockwritemerges_name)- [BlockWriteOps\_*name*](#blockwriteops_name)- [BlockWriteTime\_*name*](#blockwritetime_name)- [CPUFrequencyMHz\_*name*](#cpufrequencymhz_name)- [DictionaryMaxUpdateDelay](#dictionarymaxlastsuccessfulupdatetime)- [DictionaryTotalFailedUpdates](#dictionaryloadfailed)- [DiskAvailable\_*name*](#diskavailable_name)- [DiskTotal\_*name*](#disktotal_name)- [DiskUnreserved\_*name*](#diskunreserved_name)- [DiskUsed\_*name*](#diskused_name)- [FilesystemCacheBytes](#filesystemcachebytes)- [FilesystemCacheFiles](#filesystemcachefiles)- [FilesystemLogsPathAvailableBytes](#filesystemlogspathavailablebytes)- [FilesystemLogsPathAvailableINodes](#filesystemlogspathavailableinodes)- [FilesystemLogsPathTotalBytes](#filesystemlogspathtotalbytes)- [FilesystemLogsPathTotalINodes](#filesystemlogspathtotalinodes)- [FilesystemLogsPathUsedBytes](#filesystemlogspathusedbytes)- [FilesystemLogsPathUsedINodes](#filesystemlogspathusedinodes)- [FilesystemMainPathAvailableBytes](#filesystemmainpathavailablebytes)- [FilesystemMainPathAvailableINodes](#filesystemmainpathavailableinodes)- [FilesystemMainPathTotalBytes](#filesystemmainpathtotalbytes)- [FilesystemMainPathTotalINodes](#filesystemmainpathtotalinodes)- [FilesystemMainPathUsedBytes](#filesystemmainpathusedbytes)- [FilesystemMainPathUsedINodes](#filesystemmainpathusedinodes)- [HTTPThreads](#httpthreads)- [HTTPSecureThreads](#httpsecurethreads)- [InterserverThreads](#interserverthreads)- [InterserverSecureThreads](#interserversecurethreads)- [Jitter](#jitter)- [LoadAverage*N*](#loadaveragen)- [MaxPartCountForPartition](#maxpartcountforpartition)- [MemoryCode](#memorycode)- [MemoryDataAndStack](#memorydataandstack)- [MemoryResidentMax](#memoryresidentmax)- [MemoryResident](#memoryresident)- [MemoryShared](#memoryshared)- [MemoryVirtual](#memoryvirtual)- [MySQLThreads](#mysqlthreads)- [NetworkReceiveBytes\_*name*](#networkreceivebytes_name)- [NetworkReceiveDrop\_*name*](#networkreceivedrop_name)- [NetworkReceiveErrors\_*name*](#networkreceiveerrors_name)- [NetworkReceivePackets\_*name*](#networkreceivepackets_name)- [NetworkSendBytes\_*name*](#networksendbytes_name)- [NetworkSendDrop\_*name*](#networksenddrop_name)- [NetworkSendErrors\_*name*](#networksenderrors_name)- [NetworkSendPackets\_*name*](#networksendpackets_name)- [NumberOfDatabases](#numberofdatabases)- [NumberOfDetachedByUserParts](#numberofdetachedbyuserparts)- [NumberOfDetachedParts](#numberofdetachedparts)- [NumberOfTables](#numberoftables)- [OSContextSwitches](#oscontextswitches)- [OSGuestNiceTime](#osguestnicetime)- [OSGuestNiceTimeCPU\_*N*](#osguestnicetimecpu_n)- [OSGuestNiceTimeNormalized](#osguestnicetimenormalized)- [OSGuestTime](#osguesttime)- [OSGuestTimeCPU\_*N*](#osguesttimecpu_n)- [OSGuestTimeNormalized](#osguesttimenormalized)- [OSIOWaitTime](#osiowaittime)- [OSIOWaitTimeCPU\_*N*](#osiowaittimecpu_n)- [OSIOWaitTimeNormalized](#osiowaittimenormalized)- [OSIdleTime](#osidletime)- [OSIdleTimeCPU\_*N*](#osidletimecpu_n)- [OSIdleTimeNormalized](#osidletimenormalized)- [OSInterrupts](#osinterrupts)- [OSIrqTime](#osirqtime)- [OSIrqTimeCPU\_*N*](#osirqtimecpu_n)- [OSIrqTimeNormalized](#osirqtimenormalized)- [OSMemoryAvailable](#osmemoryavailable)- [OSMemoryBuffers](#osmemorybuffers)- [OSMemoryCached](#osmemorycached)- [OSMemoryFreePlusCached](#osmemoryfreepluscached)- [OSMemoryFreeWithoutCached](#osmemoryfreewithoutcached)- [OSMemoryTotal](#osmemorytotal)- [OSNiceTime](#osnicetime)- [OSNiceTimeCPU\_*N*](#osnicetimecpu_n)- [OSNiceTimeNormalized](#osnicetimenormalized)- [OSOpenFiles](#osopenfiles)- [OSProcessesBlocked](#osprocessesblocked)- [OSProcessesCreated](#osprocessescreated)- [OSProcessesRunning](#osprocessesrunning)- [OSSoftIrqTime](#ossoftirqtime)- [OSSoftIrqTimeCPU\_*N*](#ossoftirqtimecpu_n)- [OSSoftIrqTimeNormalized](#ossoftirqtimenormalized)- [OSStealTime](#osstealtime)- [OSStealTimeCPU\_*N*](#osstealtimecpu_n)- [OSStealTimeNormalized](#osstealtimenormalized)- [OSSystemTime](#ossystemtime)- [OSSystemTimeCPU\_*N*](#ossystemtimecpu_n)- [OSSystemTimeNormalized](#ossystemtimenormalized)- [OSThreadsRunnable](#osthreadsrunnable)- [OSThreadsTotal](#osthreadstotal)- [OSUptime](#osuptime)- [OSUserTime](#osusertime)- [OSUserTimeCPU\_*N*](#osusertimecpu_n)- [OSUserTimeNormalized](#osusertimenormalized)- [PostgreSQLThreads](#postgresqlthreads)- [ReplicasMaxAbsoluteDelay](#replicasmaxabsolutedelay)- [ReplicasMaxInsertsInQueue](#replicasmaxinsertsinqueue)- [ReplicasMaxMergesInQueue](#replicasmaxmergesinqueue)- [ReplicasMaxQueueSize](#replicasmaxqueuesize)- [ReplicasMaxRelativeDelay](#replicasmaxrelativedelay)- [ReplicasSumInsertsInQueue](#replicassuminsertsinqueue)- [ReplicasSumMergesInQueue](#replicassummergesinqueue)- [ReplicasSumQueueSize](#replicassumqueuesize)- [TCPThreads](#tcpthreads)- [TCPSecureThreads](#tcpsecurethreads)- [GRPCThreads](#grpcthreads)- [PrometheusThreads](#prometheusthreads)- [KeeperTCPThreads](#keepertcpthreads)- [KeeperTCPSecureThreads](#keepertcpsecurethreads)- [Temperature\_*N*](#temperature_n)- [Temperature\_*name*](#temperature_name)- [TotalBytesOfMergeTreeTables](#totalbytesofmergetreetables)- [TotalPartsOfMergeTreeTables](#totalpartsofmergetreetables)- [TotalPrimaryKeyBytesInMemory](#totalprimarykeybytesinmemory)- [TotalPrimaryKeyBytesInMemoryAllocated](#totalprimarykeybytesinmemoryallocated)- [TotalRowsOfMergeTreeTables](#totalrowsofmergetreetables)- [Uptime](#uptime)- [ZooKeeperClientLastZXIDSeen](#zookeeperclientlastzxidseen)- [LongestRunningMerge](#longestrunningmerge)- [jemalloc.active](#jemallocactive)- [jemalloc.allocated](#jemallocallocated)- [jemalloc.arenas.all.dirty\_purged](#jemallocarenasalldirty_purged)- [jemalloc.arenas.all.muzzy\_purged](#jemallocarenasallmuzzy_purged)- [jemalloc.arenas.all.pactive](#jemallocarenasallpactive)- [jemalloc.arenas.all.pdirty](#jemallocarenasallpdirty)- [jemalloc.arenas.all.pmuzzy](#jemallocarenasallpmuzzy)- [jemalloc.background\_thread.num\_runs](#jemallocbackground_threadnum_runs)- [jemalloc.background\_thread.num\_threads](#jemallocbackground_threadnum_threads)- [jemalloc.background\_thread.run\_intervals](#jemallocbackground_threadrun_intervals)- [jemalloc.epoch](#jemallocepoch)- [jemalloc.mapped](#jemallocmapped)- [jemalloc.metadata](#jemallocmetadata)- [jemalloc.metadata\_thp](#jemallocmetadata_thp)- [jemalloc.resident](#jemallocresident)- [jemalloc.retained](#jemallocretained)- [jemalloc.prof.active](#jemallocprofactive)

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