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 cpu usage high

Author  Topic 

RoyalSher
Yak Posting Veteran

95 Posts

Posted - 2004-07-07 : 05:19:24
Hi, In my shop I have a Sql server 7, with latest patches installed. customers of the application are for intranet. The Sql server had been quite and calm for the past week and before.

But on 7/6, the CPU usage has shot abruptly and caused slow response..cpu to 50% - 95% in regular interval. I am trying to figure, why did this happen without any changes applied either to application or database nor the server.

Can anybody throw some light on this ?

Thanks in advance.

RoyalSher.
*********
The world is the great gymnasium where we come to make ourselves strong.

Wanderer
Master Smack Fu Yak Hacker

1168 Posts

Posted - 2004-07-07 : 05:37:54
Well, I am guessing you didn't have Profiler running, which might have shown you an increase in cleint connections/SQL work.

Is most of your code calling SP's ? Maybe you had a spike in transactions, or an infrequently called transaction calling an infrequently used SP ? Is there any way to determine in yuor environment whether there was a change in the "mix" of transaction/work being done from the client side?

Do you have performance monitor logging, or a 3rd party performance monitoring tool (MOM, Patrol, etc. etc.) - I'm wondering if the CPU activity was all SQL, or perhaps something else ? I've seen soemthing similar when admin's managed to launch a virus scan of all drives during an online day.

CiaO

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Chaos, Disorder and Panic ... my work is done here!
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