write latency increase after upgrade from pacific to quincy

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Hi dear ceph community

We have encountered an issue with our ceph cluster after upgrading from
v16.2.13 to v17.2.7.
The issue is that the write latency on OSDs has increased significantly and
doesn't seem to plummet back down.
The average write latency has almost doubled, and this has happened since
we upgraded the OSDs.

If anybody could help figure this out.

Kind regards
Nima
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