Re: Shark disk performance configuration

Be sure the firmware upgrade you put on was not more recently withdrawn for
issues. Other than that, I'd check to see if some tuning parameters were tuned
with the system running, but when you rebooted, they were not saved across
reboots withg /etc/tunables.

BV

--- Andrew.Townsend@xxxxxxxxx wrote:

We recently performed a firmware upgrade on a p570. After the upgrade, we
saw root filesystem corruption on some filesystems. We ended up falling
back to an alt_disk rootvg but needed to reconfigure the devices because
the alt disk install was run with the following flags: -O -B â??C. (-O
performs a reset of the devices).

After the system came back up, we noticed what appears to be slow
performance from the shark. At this point we are contributing this to the
device reset. Weâ??ve bumped num_cmd_elems on the HBAs from 20 to 1024 to see
if performance improves. It had perhaps a slight improvement. In what other
areas should I look as far as the shark disk / HBA performance?

This node is a dedicated database server.

TIA,

Drew



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