[SunHELP] SUN-AXMP and i/o-problem

[Bill Bradford]

On Tue, May 15, 2001 at 11:04:09PM +0200, Michael Karl wrote:
> Hi all,
> i have 4 SUN-AXMP-Server , always 4 cpu's (from 300MHz to 450MHz) with 2 or
> 4 GB RAM, 4 GB swap under Solaris 7 with the newest recommended
> Patch-Cluster. Only one  of these machines - the newst with 4x450MHz CPU -
> has sometimes - 1 to 2 times a day - a great problem.
> This machine becomes very slow. No messages are displayed in the console, no
> failure in the applikations, no core-files, no heavy cpu utilization ratio
> in the process-manager or proctool, but very heavy i/o seen with iostat and
> on the leds of the hardware-raid. There is also no failure reported in the
> hardware-raid-controller event log.
> Is there any possibility to locate the process making this heavy I/O ?
> thanks Michael

Michael - what kind of hardware RAID setup do you have?  Do you have
anything using cron that might be doing heavy I/O at this time?
Have you considered using "sar" and the SARGE utility to analyze what
is causing the slowdown?

Is the slowdown always at the same time of day?

Bill

-- 
Bill Bradford
mrbill at mrbill.net
Austin, TX