Oracle-L: RE: 8.1.7 instance on Solaris periodically goes sluggish, then ha

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Mon, 28 Jul 2003 06:19:24 -0800
Message-ID: <F001.005C7790.20030728061924@fatcity.com>

Paul - What I've found to be the most helpful is to install Oracle's STATSPACK (included free with your Oracle). Then when you receive the first report of sluggishness, take a STATSPACK snapshot. About 5 minutes later, take another. It takes a snapshot of what is going on with your database at that time, including the wait statistics so you can see what your database was waiting on. Best of all, it just takes a moment, so you can spend time telling the users that everything will be well soon.

Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Monday, July 28, 2003 9:05 AM
To: Multiple recipients of list ORACLE-L hangs...

Paul

Checked the Following

Are there any error in the Alert.log file
Are the Database in Archivelog mode and the Log_archive_start is not marked true and so it might be hanging after all of the Redologs are been filled as Archiver is not running.

Thanks
Indy Johal

"Paul Vincent" <Paul.Vincent_at_uce.ac.uk> Sent by: ml-errors_at_fatcity.com

07/28/03 09:39 AM
Please respond to ORACLE-L

        
        To:        Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com> 
        cc:         
        Subject:        8.1.7 instance on Solaris periodically goes

sluggish, then hangs...

Hi,

rather vague, this one, I'm afraid, but we're stumped for ideas.

We have an Oracle 8.1.7 instance on a Sun Solaris setup, which we're currently testing prior to going live. Every so often - 2 or 3 times a week - the users phone to say the application has stopped responding. They're waiting several minutes with no response. We find we can usually fire up one or two tuning apps, such as TOAD or Quest's Spotlight, but within a few minutes, these also stop responding. By this time, even trying to fire up a SQL*Plus session from my PC just hangs and hangs, without the login ever completing. We always end up having to get the sysadmin to abort-shutdown Oracle and then restart it. After which everything's fine - until the next time.

I've checked the PROCESSES parameter, and this is set to 150 - way above the maximum number of connections we've seen (around 40 or so). Likewise SESSIONS and TRANSACTIONS parameters seem generously adequate. The sysadmin says the server itself doesn't seem to be having any problems. He can log in and run UNIX commands with no apparent performance problems.

Any ideas at all would be very welcome!

Paul Vincent
Oracle DBA
University of Central England
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Author: Paul Vincent
INET: Paul.Vincent_at_uce.ac.uk

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Author: DENNIS WILLIAMS
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