--stat-name-match
For the statistic names with the performance metrics for a memory or snapshot diff, as well as for the gflags name and mem-trackers id values, it is possible to filter. The filter name for that is --stat-name-match. This is a regex for filtering.
For example if you are only interested in master and tserver cpu statistics:
yb_stats --stat-name-match 'cpu_.time'
Begin metrics snapshot created, press enter to create end snapshot for difference calculation.
Time between snapshots: 0.900 seconds
192.168.66.80:12000 server cpu_stime 15 ms 16.502 /s
192.168.66.80:7000 server cpu_stime 2 ms 2.200 /s
192.168.66.80:7000 server cpu_utime 8 ms 8.801 /s
192.168.66.80:9000 server cpu_stime 14 ms 15.402 /s
192.168.66.81:12000 server cpu_stime 6 ms 6.608 /s
192.168.66.81:12000 server cpu_utime 9 ms 9.912 /s
192.168.66.81:7000 server cpu_stime 8 ms 8.801 /s
192.168.66.81:9000 server cpu_stime 7 ms 7.709 /s
192.168.66.81:9000 server cpu_utime 9 ms 9.912 /s
192.168.66.82:12000 server cpu_stime 6 ms 6.645 /s
192.168.66.82:12000 server cpu_utime 10 ms 11.074 /s
192.168.66.82:7000 server cpu_utime 8 ms 8.840 /s
192.168.66.82:9000 server cpu_stime 6 ms 6.637 /s
192.168.66.82:9000 server cpu_utime 11 ms 12.168 /s
Or a more sophisticated filter to look at tserver and master cpu time, as well as voluntary and involuntary context switches:
yb_stats --stat-name-match '(cpu_.time|voluntary_context_switches)'
Begin metrics snapshot created, press enter to create end snapshot for difference calculation.
Time between snapshots: 0.915 seconds
192.168.66.80:12000 server cpu_utime 12 ms 13.086 /s
192.168.66.80:12000 server voluntary_context_switches 234 csws 255.180 /s
192.168.66.80:7000 server cpu_stime 2 ms 2.181 /s
192.168.66.80:7000 server cpu_utime 9 ms 9.815 /s
192.168.66.80:7000 server voluntary_context_switches 105 csws 114.504 /s
192.168.66.80:9000 server cpu_utime 13 ms 14.177 /s
192.168.66.80:9000 server voluntary_context_switches 235 csws 256.270 /s
192.168.66.81:12000 server cpu_stime 6 ms 6.550 /s
192.168.66.81:12000 server cpu_utime 8 ms 8.734 /s
192.168.66.81:12000 server voluntary_context_switches 262 csws 286.026 /s
192.168.66.81:7000 server cpu_utime 7 ms 7.625 /s
192.168.66.81:7000 server voluntary_context_switches 70 csws 76.253 /s
192.168.66.81:9000 server cpu_stime 6 ms 6.543 /s
192.168.66.81:9000 server cpu_utime 8 ms 8.724 /s
192.168.66.81:9000 server voluntary_context_switches 263 csws 286.805 /s
192.168.66.82:12000 server cpu_stime 6 ms 6.565 /s
192.168.66.82:12000 server cpu_utime 8 ms 8.753 /s
192.168.66.82:12000 server voluntary_context_switches 272 csws 297.593 /s
192.168.66.82:7000 server cpu_utime 8 ms 8.762 /s
192.168.66.82:7000 server voluntary_context_switches 65 csws 71.194 /s
192.168.66.82:9000 server cpu_stime 6 ms 6.565 /s
192.168.66.82:9000 server cpu_utime 8 ms 8.753 /s
192.168.66.82:9000 server voluntary_context_switches 269 csws 294.311 /s