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

[Michael Karl]

am 15.05.2001 23:58 Uhr schrieb Bill Bradford unter mrbill at mrbill.net:

> 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
Hi Bill

all AXmp have an CMD-RAID-FAIL-OVER-System.
All AXmp have the same crontab for root.
No, I've never used these tools.
No, it's happend differrent times.

Michael