On Tue, 2020-04-07 at 07:34 +0000, Stolte, Felix wrote:
> Hey folks,
>
> I keep getting ceph health warnings about clients failing to respond to
> cache pressure. They always refer to sessions from ganesha exports. I've read
> all threads regarding this issue, but none of my changes resolved it. What
> I’ve done so far:
>
> Ganesha.conf:
> MDCACHE {
> Dir_Chunk = 0;
> NParts = 1;
> Cache_Size = 1;
> }
>
> Attr_Expiration_Time = 0 in every export
>
> mds_cache_memory_limit = 17179869184 on MDS Servers
>
> I even set “client_oc = false” on the ganesha server, but this doesn’t seem
> to be applied
>
> My setup is ceph version 14.2.8 (All Server and clients. One active MDS.
> Ganesha 2.8.3 runs on a dedicated Server.
>
> ceph daemon mds.<active_mds> dump_mempools (filtered out the empty pools):
>
> "mempool": {
> "by_pool": {
> "bloom_filter": {
> "items": 1414723,
> "bytes": 1414723
> },
> "buffer_anon": {
> "items": 180992,
> "bytes": 2404306271
> },
> "buffer_meta": {
> "items": 178660,
> "bytes": 15722080
> },
> "osdmap": {
> "items": 4121,
> "bytes": 75912
> },
> "mds_co": {
> "items": 221728924,
> "bytes": 16320868177
> },
> },
> "total": {
> "items": 223507420,
> "bytes": 18742387163
>
>
> Every hint how to resolve the issue are welcome. If more information is
> needed, I am glad to provide it.
>
You may want to follow the suggestion here and see if it helps:
https://tracker.ceph.com/issues/44976#note-23
--
Jeff Layton <[email protected]>
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