https://bugzilla.redhat.com/show_bug.cgi?id=1377464
Bug ID: 1377464
Summary: "pmrep proc" takes too long
Product: Fedora
Version: rawhide
Component: pcp
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
Marko reports "pmrep proc" takes on the order of many seconds. Diagnosis with
the aid of a systemtap script (ltrace and $PCP_DEBUG not being helpful)
indicated that the pmrep is using the extend_item rather than extend_indom API
for the metrics beneath proc.*, one instance per call.
This means that each extend_item involves another bunch of lookups, repeated
over processes (the indom), and over metrics (proc.*).
pmrep should routinely use the extend_indom API for metrics with indoms. (It
can use the same API for metrics with a null indom!). It can find the instance
domain in the output results coming from each fetch.
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