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### FilesystemLogsPathTotalINodes[​](#filesystemlogspathtotalinodes "Direct link to FilesystemLogsPathTotalINodes")

The total number of inodes on the volume where ClickHouse logs path is mounted.

### FilesystemLogsPathUsedBytes[​](#filesystemlogspathusedbytes "Direct link to FilesystemLogsPathUsedBytes")

Used bytes on the volume where ClickHouse logs path is mounted.

### FilesystemLogsPathUsedINodes[​](#filesystemlogspathusedinodes "Direct link to FilesystemLogsPathUsedINodes")

The number of used inodes on the volume where ClickHouse logs path is mounted.

### FilesystemMainPathAvailableBytes[​](#filesystemmainpathavailablebytes "Direct link to FilesystemMainPathAvailableBytes")

Available bytes on the volume where the main ClickHouse path is mounted.

### FilesystemMainPathAvailableINodes[​](#filesystemmainpathavailableinodes "Direct link to FilesystemMainPathAvailableINodes")

The number of available inodes on the volume where the main ClickHouse path is mounted. If it is close to zero, it indicates a misconfiguration, and you will get 'no space left on device' even when the disk is not full.

### FilesystemMainPathTotalBytes[​](#filesystemmainpathtotalbytes "Direct link to FilesystemMainPathTotalBytes")

The size of the volume where the main ClickHouse path is mounted, in bytes.

### FilesystemMainPathTotalINodes[​](#filesystemmainpathtotalinodes "Direct link to FilesystemMainPathTotalINodes")

The total number of inodes on the volume where the main ClickHouse path is mounted. If it is less than 25 million, it indicates a misconfiguration.

### FilesystemMainPathUsedBytes[​](#filesystemmainpathusedbytes "Direct link to FilesystemMainPathUsedBytes")

Used bytes on the volume where the main ClickHouse path is mounted.

### FilesystemMainPathUsedINodes[​](#filesystemmainpathusedinodes "Direct link to FilesystemMainPathUsedINodes")

The number of used inodes on the volume where the main ClickHouse path is mounted. This value mostly corresponds to the number of files.

### HTTPThreads[​](#httpthreads "Direct link to HTTPThreads")

Number of threads in the server of the HTTP interface (without TLS).

### HTTPSecureThreads[​](#httpsecurethreads "Direct link to HTTPSecureThreads")

Number of threads in the server of the HTTPS interface.

### InterserverThreads[​](#interserverthreads "Direct link to InterserverThreads")

Number of threads in the server of the replicas communication protocol (without TLS).

### InterserverSecureThreads[​](#interserversecurethreads "Direct link to InterserverSecureThreads")

Number of threads in the server of the replicas communication protocol (with TLS).

### Jitter[​](#jitter "Direct link to Jitter")

The difference in time the thread for calculation of the asynchronous metrics was scheduled to wake up and the time it was in fact, woken up. A proxy-indicator of overall system latency and responsiveness.

### LoadAverage*N*[​](#loadaveragen "Direct link to loadaveragen")

The whole system load, averaged with exponential smoothing over 1 minute. The load represents the number of threads across all the processes (the scheduling entities of the OS kernel), that are currently running by CPU or waiting for IO, or ready to run but not being scheduled at this point of time. This number includes all the processes, not only clickhouse-server. The number can be greater than the number of CPU cores, if the system is overloaded, and many processes are ready to run but waiting for CPU or IO.

### MaxPartCountForPartition[​](#maxpartcountforpartition "Direct link to MaxPartCountForPartition")

Maximum number of parts per partition across all partitions of all tables of MergeTree family. Values larger than 300 indicates misconfiguration, overload, or massive data loading.

### MemoryCode[​](#memorycode "Direct link to MemoryCode")

The amount of virtual memory mapped for the pages of machine code of the server process, in bytes.

### MemoryDataAndStack[​](#memorydataandstack "Direct link to MemoryDataAndStack")

The amount of virtual memory mapped for the use of stack and for the allocated memory, in bytes. It is unspecified whether it includes the per-thread stacks and most of the allocated memory, that is allocated with the 'mmap' system call. This metric exists only for completeness reasons. I recommend to use the `MemoryResident` metric for monitoring.

### MemoryResidentMax[​](#memoryresidentmax "Direct link to MemoryResidentMax")

Maximum amount of physical memory used by the server process, in bytes.

### MemoryResident[​](#memoryresident "Direct link to MemoryResident")

The amount of physical memory used by the server process, in bytes.

### MemoryShared[​](#memoryshared "Direct link to MemoryShared")

The amount of memory used by the server process, that is also shared by another processes, in bytes. ClickHouse does not use shared memory, but some memory can be labeled by OS as shared for its own reasons. This metric does not make a lot of sense to watch, and it exists only for completeness reasons.

### MemoryVirtual[​](#memoryvirtual "Direct link to MemoryVirtual")

The size of the virtual address space allocated by the server process, in bytes. The size of the virtual address space is usually much greater than the physical memory consumption, and should not be used as an estimate for the memory consumption. The large values of this metric are totally normal, and makes only technical sense.

### MySQLThreads[​](#mysqlthreads "Direct link to MySQLThreads")

Number of threads in the server of the MySQL compatibility protocol.

### NetworkReceiveBytes\_*name*[​](#networkreceivebytes_name "Direct link to networkreceivebytes_name")

Number of bytes received via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkReceiveDrop\_*name*[​](#networkreceivedrop_name "Direct link to networkreceivedrop_name")

Number of bytes a packet was dropped while received via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkReceiveErrors\_*name*[​](#networkreceiveerrors_name "Direct link to networkreceiveerrors_name")

Number of times error happened receiving via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkReceivePackets\_*name*[​](#networkreceivepackets_name "Direct link to networkreceivepackets_name")

Number of network packets received via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkSendBytes\_*name*[​](#networksendbytes_name "Direct link to networksendbytes_name")

Number of bytes sent via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkSendDrop\_*name*[​](#networksenddrop_name "Direct link to networksenddrop_name")

Number of times a packed was dropped while sending via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkSendErrors\_*name*[​](#networksenderrors_name "Direct link to networksenderrors_name")

Number of times error (e.g. TCP retransmit) happened while sending via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NetworkSendPackets\_*name*[​](#networksendpackets_name "Direct link to networksendpackets_name")

Number of network packets sent via the network interface. This is a system-wide metric, it includes all the processes on the host machine, not just clickhouse-server.

### NumberOfDatabases[​](#numberofdatabases "Direct link to NumberOfDatabases")

Total number of databases on the server.

### NumberOfDetachedByUserParts[​](#numberofdetachedbyuserparts "Direct link to NumberOfDetachedByUserParts")