[Bug 1141] linux pmda does too much work for process queries

[bugzilla-daemon@xxxxxxxxxxx]

Comment # 1 on bug 1141 from Frank Ch. Eigler

For example, the three proc.* metrics commonly included in default pmlogger
configurations (proc.runq.blocked, proc.runq.runnable, proc.nprocs) require
little to no actual /proc/*/{stat,cmdline} traffic.  The values in /proc/stats
and /proc/loadavg, and possibly a directory enumeration of /proc/* (to count
processes vs. threads) should satisfy the metrics.  Instead the pmda goes
through a "refresh", checking per-process stats and command lines and stuff. 
Unnecessary.

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