Administrator Guide

○ Counters are used to count bytes, operations, and errors.
○ Often reported as a rate such as counts/second or KB/second.
● readings - Instantaneous value (analogous to a car’s speedometer)
○ Readings are used to display CPU utilization, memory utilization.
○ Value can change every sample.
● period-average - Average of a series calculated over the last sample period. If:
○ current_reading_sum is the sum of all readings for the particular statistic since the monitor's creation.
○ previous_reading_sum is the count of all readings for the statistic since the monitor's creation.
○ period-average = (current_reading_sum - previous_reading_sum) / (current_reading_count - previous_reading_count)
Many statistics require a target port or volume to be specified. Output of the monitor stat-list command identifies which
statistics need a target defined, and the type of target required when a monitor is created.
Figure 10. Monitoring targets
Display available statistics
Statistics are grouped into sub-categories.
Use the monitor stat-list command followed by the <Tab> key to display the statistics sub-categories. For example:
VPlexcli:/> monitor stat-list be-prt, cache, cg, director, directory, fc-com-port, fe-
director, fe-lu, fe-prt, ip-com-port, ramf, rdma, storage-volume, virtual-volume, wrt-
pacing
Use the --categories categories option to display the statistics available in the specified category. For example:
VPlexcli:/monitoring> monitor stat-list --categories director
Name Target Type Units
--------------------- ------ ------- --------
director.be-aborts n/a counter counts/s
director.be-ops n/a counter counts/s
director.be-ops-read n/a counter counts/s
director.be-ops-write n/a counter counts/s
director.be-read n/a counter KB/s
.
.
.
Use the * wildcard to display all statistics for all categories.
For example:
VPlexcli:/> monitor stat-list *
Name Target Type Units
----------------------------------------------- ----------------- ------- --------
be-prt.read backend-port counter KB/s
be-prt.write backend-port counter KB/s
cache.dirty n/a reading KB
cache.miss n/a counter counts/s
cache.rhit n/a counter counts/s
cache.subpg n/a counter counts/s
cg.closure consistency-group bucket us
cg.delta-util consistency-group reading %
96
Performance and Monitoring