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Re: strange wait event
- From: Mladen Gogala <mgogala@xxxxxxxxxxxxxxxxxxxx>
- To: xwu@xxxxxxxxxxxxxxxxx
- Date: Tue, 02 Aug 2005 09:27:38 -0400
oracle-l-bounce@xxxxxxxxxxxxx wrote:
On one of our test databases, I saw a lot of wait events called "ksu process alloc
latch yield" which I have never seen before. The system was very slow. I could not
find any information about it. Does anybody know it?
Thanks,
Michael
Mike, KSU related events are session login/logout events which can be
traced by using events 10029/10030. This looks
like you are having many processes created at once. The usual cause of
the latch contention is a CGI application which issues
a new login at every page and, of course, PMON terminating those
sessions when the corresponding process is out. May be
you should consider using an application server or PHP5? I am a strong
advocate of capital punishment for creators of
applications like that. Whoever writes a thing like that deserves to be
executed by having to listen to Anna Nicole Smith
until dead.
--
Mladen Gogala
Oracle DBA
Ext. 121
--
http://www.freelists.org/webpage/oracle-l
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