mon: smooth io/recovery stats over longer period #13249
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On a busy cluster, the PGMap will turn over every 1-2 seconds and OSDs will report PG stats every 5-10 seconds. Averaging over only two PGMap versions (2-4 seconds) will lead to erratic and spikey delta values. Move to 6 versions (6-12 seconds) to better match the reporting interval while still keeping the values somewhat responsive. Signed-off-by: Sage Weil <sage@redhat.com>
tchaikov
approved these changes
Feb 10, 2017
|
a larger window for averaging makes sense to me. |
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On a busy cluster, the PGMap will turn over every 1-2 seconds and
OSDs will report PG stats every 5-10 seconds. Averaging over only
two PGMap versions (2-4 seconds) will lead to erratic and spikey
delta values. Move to 6 versions (6-12 seconds) to better match
the reporting interval while still keeping the values somewhat
responsive.
Signed-off-by: Sage Weil sage@redhat.com