https://bugzilla.redhat.com/show_bug.cgi?id=1242463
Bug ID: 1242463
Summary: RFE: provide a method to query set of metrics with
aliases
Product: Fedora
Version: 22
Component: pcp
Assignee: nathans@xxxxxxxxxx
Reporter: myllynen@xxxxxxxxxx
QA Contact: extras-qa@xxxxxxxxxxxxxxxxx
CC: brolley@xxxxxxxxxx, fche@xxxxxxxxxx, lberk@xxxxxxxxxx,
mgoodwin@xxxxxxxxxx, nathans@xxxxxxxxxx,
pcp@xxxxxxxxxxx, scox@xxxxxxxxxx
Description of problem:
When running an application with somewhat known behaviour patterns it is
sometimes a known set of performance metrics that are of interest. Just to give
an example, these "interesting" metrics could include certain metrics from
kernel, mem, disk, network, nfs, and a (custom) PMDA.
While there are many recent PCP utilities (pmstat, pmiostat, pmcollect, pmatop)
which greatly help inspecting general system level behaviour no tool currently
allows a quick display of such a set of predefined metrics. pmdumptext could be
perhaps used but typing more than few metric names quickly becomes tedious. So
either a wrapper for it or a separate API using script would be needed.
It would be nice if PCP would allow one to use "aliases" to define a set of
metrics that merely requesting statistics for an alias would display all the
associated metrics.
I realize this might require quite a lot of work to implement (and might be
more natural to do so in wrapper scripts) but OTOH it would provide lots of
flexibility e.g. for support personnel working under pressure to solve issues
in production systems where applications are known and using "aliases" would be
much easier than typing dozens of metrics manually.
This is obviously about command line only, on GUI/WebUI side this is already
possible.
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