On Thu, Sep 8, 2016 at 5:59 AM, Georgi Chorbadzhiyski <georgi.chorbadzhiyski@xxxxxxxxx> wrote: > Today I was surprised to find our cluster in HEALTH_WARN condition and > searching in documentation was no help at all. > > Does anybody have an idea how to cure the dreaded "failing to respond > to cache pressure" message. As I understand it, it tells me that a > client is not responding to MDS request to prune it's cache but > I have no idea what is causing the problem and how to cure it. > > I'm using kernel cephfs driver on kernel 4.4.14. You probably want to search the list archives at gmane et al for this. You should check to see how many files the clients are actually using compared to what they hold caps on (you can check caps via the admin socket); it might just be that the amount of in-use data is higher than your MDS cache size (100k by default, but you probably have enough memory to increase it by one or two orders of magnitude). -Greg _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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