getPerf

Syntax

getPerf()

Arguments

None

Details

getPerf returns various performance monitoring metrics of the local node as a dictionary.

The dictionary contains the following fields:

  • runningJobs: The number of running jobs.

  • jobLoad: The CPU load of a job.

  • avgLoad: average CPU load.

  • queuedJobs: The number of jobs in queue.

  • lastMinuteNetworkSend: The data (in bytes) sent in the last minute.

  • lastMinuteNetworkRecv: The data (in bytes) received in the last minute.

  • lastMinuteReadVolume: The data (in bytes) read from disk in the last minute.

  • lastMinuteWriteVolume: The data (in bytes) written to disk in the last minute.

  • lastMsgLatency: The latency (in ns) of the last received message.

  • cumMsgLatency: The cumulative latency (in ns) of the messages.

  • maxLast10QueryTime: The maximum execution time (in ns) of the previous 10 finished queries.

  • maxLast100QueryTime: The maximum execution time (in ns) of the previous 100 finished queries.

  • medLast10QueryTime: The median execution time (in ns) of the previous 10 finished queries.

  • medLast100QueryTime: The median execution time (in ns) of the previous 100 finished queries.

  • maxRunningQueryTime: The maximum elapsed time (in ns) of the queries that are currently running.

  • diskFreeSpaceRatio: The available space ratio.

  • diskReadRate: The rate (in bytes/s) at which data are read from disk.

  • diskWriteRate: The rate (in bytes/s) at which data are written to disk.

  • diskFreeSpace: The available disk space (in bytes).

  • diskCapacity: The disk capacity (in bytes).

  • cpuUsage: CPU usage.

  • memoryAlloc: The total memory (in bytes) allocated to DolphinDB on the node.

  • memoryUsed: The memory (in bytes) used by the node.

  • networkSendRate: The rate at which data are sent (in bytes/s).

  • networkRecvRate: The rate at which data are received (in bytes/s).

  • connectionNum: The number of connections to the local node.

Examples

getPerf();
// output
lastMinuteWriteVolume->684
runningJobs->0
lastMsgLatency->0
maxLast100QueryTime->0
avgLoad->0.0040625
diskWriteRate->144
lastMinuteNetworkSend->228528
queuedJobs->0
lastMinuteNetworkRecv->525533
maxLast10QueryTime->0
medLast100QueryTime->0
maxRunningQueryTime->0
diskReadRate->2663
cumMsgLatency->0
medLast10QueryTime->0
diskFreeSpaceRatio->0
cpuUsage->0.306748466257669
memoryUsed->29053456
jobLoad->0
networkSendRate->4460
memoryAlloc->35463168
lastMinuteReadVolume->159940
networkRecvRate->8950
diskCapacity->0
diskFreeSpace->0