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