Red Hat Bugzilla – Bug 1309190
PCP -S can't be used in live mode
Last modified: 2016-12-20 13:46:50 EST
Description of problem:
By default the time window commences immediately in real-time
mode, or coincides with time at the start of the PCP archive log
in archive mode. The -S option may be used to specify a later
time for the start of the time window.
To specify an offset from the current time (in real-time
mode) or the beginning of a PCP archive (in archive mode)
simply specify the interval of time as the argument. For
example -S 30min will set the start of the time window to
be exactly 30 minutes from now in real-time mode, or
exactly 30 minutes from the start of a PCP archive.
$ pmval -S 1m kernel.all.sysfork
pmval: time window options are supported for archives only
Usage: pmval [options] metricname
So the man page and the libpcp code are not in sync.
This is a bit of a shortcoming (incorrect assumption) in the pmGetOptions(3) routine - should not be very hard to fix if someone wants to take a crack at it.
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