Look at CPU, Memory , Disk  and locks. Do you have metrics over time.
Was the CPU load higher than normal. Has it reoccurred. Most times
something like this might be related to some kind of lock conflict or
something like XM. Did an "event" occur like the purging of a file or
maybe the network was overloaded or maybe you did have some kind of disk
problem. If you have SOS then start running it in batch and develop
metrics over time to help identify what or whom is the cause and when it
occurs. Of course you could just be overloaded. Did you have a larger
than normal load such as more online users or more than normal
Supertool??? Does it always occur at the same time of day(whatever it
is). Define poor performance, bad response time, logoff time, mpe
command execution, poor batch job throughput. Are the databases in good
tune. Maybe a dataset is filling up or a dataset dynamically expanded.
When was the last time you resorted your detail chains. Did somebody
start running the batch input to MACS and raise the transaction load.

What has changed. New OS, new disks, new version of application, new
programmer, new patches????



Hoxsie, Howard wrote:

> Hello All,
>
> Here's one from everyone's favorite problem area, performance evaluation.
>
> We have both Glance and SOS on our 989-650 (6.5pp2 w/May2002-reactives) and when the help-desk folks started reporting poor performance complaints from the users today I started taking a much closer look with both utilities.  I understand that Memory Read Hit % should normally be seen in the mid 90s % whereas ours has ranged between 58% and 72% over a 1 hour period.
>
> I have been banging my head against this issue for quite a while and am having a hard time pinning down the real cause of the problem (yeah, looking for that magic bullet again--I keep forgetting where I keep it).  Has anyone else experienced these symptoms before?  In other words, do any of you have any magic bullets you can share with me?
>
> We have 3.7 Gig of memory (we still have a PSI card so we can't get to 8 gig until we remove it or add on a beta patch).  We run Ecometry software.  We do 10 times (according to a highly regarded performance specialist we contracted for a performance study last year) the number of SUPRTOOL routines during each week than a normal system.  We have half a dozen jumbo, waaaaaay-jumbo, datasets in our environment.  Last month we replaced our old disk array with a new one with disks nearly 3 times as fast as the old one and some batch processes really improved while others stayed the same.
>
> ANY ideas, hints, suggestions, recommendations, or offers of lucrative early retirement will be graciously and gratefully accepted.
>
> Howard Hoxsie
> Sr. HPe3000 Systems Administrator
> Nordstrom-direct, inc.
> www.nordstrom.com
> (206) 215-7069 voice
> (206) 215-7869 fax
> (206) 356-0683 cellular
> [log in to unmask]
> 600 University Street, Suite 600
> Seattle, WA   98101-4102
>
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