1. The pg log contains 3000 entries by default (on
nautilus). These
3000 entries can legitimately consume gigabytes of ram for some
use-cases. (I haven't determined exactly which ops triggered this
today).
How can I check how much ram my pg_logs are using?
-----Original Message-----
Cc: ceph-users
Subject: [ceph-users] Re: another osd_pglog memory usage incident
On 09.10.20 13:55, Dan van der Ster wrote:
[...]
I also noticed a possible relationship with scrubbing
-- One week ago
we increased to osd_max_scrubs=5 to clear out a scrubbing backlog; I
wonder if the increased read/write ratio somehow led to an exploding
buffer_anon. Do things stabilize on your side if you temporarily
disable scrubbing?
During the worst periods, we had disabled scrubbing. When we re-enabled,
we had our write-job to mitigate the problems. And currently, scrub load
is low. So I cannot tell, but it is very plausible.
Cheers
Harry
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