Re: Hot rb_next, setup_cluster_no_bitmap

Chris Mason
2011-08-04T14:04:29Z

Excerpts from Simon Kirby''s message of 2011-08-03 21:32:10
-0400:
> Perhaps as a further clue as to what is going on, on this same backup box
> after all of the rsyncs are finished/killed and a good amount of time has
> passed (no cleaner processes running in the background or anything),
> "sync" is still consistently takes ~4 minutes to run, and pushes
out a
> lot to disk every time it is run. Example:
>
> echo 3 > /proc/sys/vm/drop_caches
> sync
> echo 3 > /proc/sys/vm/drop_caches
> sync
> vmstat 1 &
> time sync

Just to confirm, the profiling during this time shows your system time
is all in rb_next?

-chris