24 Mar
2023
24 Mar
'23
9:09 p.m.
Hi Matthias,
Prometheus exporter already have all this metrics, you can setup Grafana panels as you
want
Also, the apply latency in a metric for a pre-bluestore, i.e. filestore
For Bluestore apply latency is the same as commit latency, you can check this via `ceph
osd perf` command
k
On 25 Mar 2023, at 00:02, Matthias Ferdinand
<mf+ml.ceph(a)mfedv.net> wrote:
Hi,
I would like to understand how the per-OSD data from "ceph osd perf"
(i.e. apply_latency, commit_latency) is generated. So far I couldn't
find documentation on this. "ceph osd perf" output is nice for a quick
glimpse, but is not very well suited for graphing. Output values are
from the most recent 5s-averages apparently.
With "ceph daemon osd.X perf dump" OTOH, you get quite a lot of latency
metrics, while it is just not obvious to me how they aggregate into
apply_latency and commit_latency. Or some comparably easy read latency
metric (something that is missing completely in "ceph osd perf").
Can somebody shed some light on this?
Regards
Matthias
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