RE: DB Slow, v$session_wait showing SQL*Net message from client

From: <waibals_at_mtn.co.ug>
Date: Thu, 04 Dec 2003 22:34:26 -0800
Message-ID: <F001.005D8D20.20031204223426@fatcity.com>

Hi Ganesh-
Thanks for your highlight.
>From thei query,

"select s.sid "SID",s.serial# "Serial", s.osuser "O/S-User", s.username "Ora-User",
s.process "Process-ID", s.status
"Status",sw.state,sw.seconds_in_wait,sw.event,s.program,s.machine,s.terminal from v$session s,v$session_wait sw
where sw.sid=s.sid
order by 8 desc "
I get PMON and LMON with the highest seconds_in_wait (36267,36250). Is this a pointer to poor performence of the lock monitor? BTW, this problem started around the time when our network was hit by the W32/NACHI-A virus -is it possible that the virus is causing Zombie requests to the DB -just a desperate thought!!!

Regards,

CSW Simon.

-----Original Message-----
Sent: Friday, December 05, 2003 8:48 AM
To: Simon Waibale
Cc: LazyDBA.com Discussion

it is the Other way ..

Oracle is waiting to hear from all these Clients..

Initially u can safely Ignore the SQL*Net Waits To/From and concentrate on the other waits.

If after Tunning that u find a Lot waits to To/From Sql*Net then u haven Underlying network issues.

HTH Regards,
Ganesh R
Mantas Implementation Team
DID : (+65) 6231-8719
HP : (+65) 9067-8474

Live to learn... forget... and learn again.

                      <waibals_at_mtn.co.

                      ug>                      To:      "LazyDBA.com
Discussion" <oracledba_at_lazydba.com>                               
                                               cc:

                      12/05/03 01:42           Subject: DB Slow,
v$session_wait shoeing SQL*Net message from client                    
                      PM

Hi Gurus-
of my DB(8174, Tru64 Unix) has terribly slowed down! Checked Indexes, Stats, etc but all look fine to me. Only one strange thing:
I have more than 100 sessions in the v$session wait with same EVENT,P1TEXT, P1,STATE
(SQL*Net message from client ,driver id,1413697536,WAITING). Refs to the v$session_wait view indicate that P1 is a hex representation and 1413697536==TCP.
QNS:
1) Is it normal to have all these waits? 2) Does this mean clients are waiting to 'hear' from oracle hence the apparent slowdown

Can anyone out explain to me the meaning of this and possible remedy.

Thanking you all-

CSW Simon.
DBA -MTN Uganda.

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Received on Fri Dec 05 2003 - 00:34:26 CST