Re: What is client request_load_avg? Troubleshooting MDS issues on Luminous

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On Wed, 2022-08-17 at 21:43 +1000, Chris Smart wrote:
> 
> Ohhhh, is "journal_and_reply" actually the very last event in a
> successful operation?...[1] No wonder so many are the last event...
> :facepalm:
> 
> OK, well assuming that, then I can probably look out for ops which
> have
> a both a journal_and_reply event and took a large duration and see
> what
> they got stuck on... then maybe work out whatever that stuck event
> means.
> 
> [1]
> https://github.com/ceph/ceph/blob/d54685879d59f2780035623e40e31115d80dabb1/src/mds/Server.cc#L1925
> 
> -c

Oh, no actually from dumping historic mds ops I can see that
"journal_and_reply" is totally _not_ the last event at all, "done" is.
OK that makes more sense, I was on the right path the first time.

Now to go through these ops and see if I can find what the bottlenecks
are.

-c
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