Hi, I agree with "someone" -- it's not a good idea to just naively enable pg_autoscaler on an existing cluster with lots of data and active customers. If you're curious about this feature, it would be harmless to start out by enabling it with pg_autoscale_mode = warn on each pool. This way you can see what the autoscaler would do if it were set to *on*. Then you can tweak all the target_size_ratio or target_size_bytes accordingly. BTW, do you have some feeling that your 17000 PGs are currently not correctly proportioned for your cluster? -- Dan On Tue, Jun 16, 2020 at 11:31 AM Boris Behrens <bb@xxxxxxxxx> wrote: > > Hi, > > I would like to enable the pg_autoscaler on our nautilus cluster. > Someone told me that I should be really really careful to NOT have > customer impact. > > Maybe someone can share some experience on this? > > The Cluster got 455 OSDs on 19 hosts with ~17000 PGs and ~1petabyte > raw storage where ~600TB raw is used. > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |