Yeah, as I understand it you should have 6000 IOPS available for the md
device (ideally).
The iostats you display certainly look benign... but the key time to be
sampling would be when you see the lock list explode - could look very
different then.
Re vm.dirty* - I would crank the values dow
Thanks Mark,
I had a look at the iostat output (on a 5s interval) and pasted it below.
The utilization and waits seems low. Included a sample below, #1 taken
during normal operation and then when the locks happen it basically drops
to 0 across the board. My (mis)understanding of the IOPS was that
Hello, i think that your system during the checkpoint pauses all clients in
order to flush all data from controller's cache to the disks if i were you
i'd try to tune my checkpoint parameters better, if that doesn't work, show
us some vmstat output please
Vasilis Ventirozos
-- Forwarded me
