getPerf

getPerf()

None

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.

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