RE: redo copy latch low??

From: Rajaram <rajaram_k_at_netzero.net>
Date: Mon, 28 May 2001 10:43:36 -0700
Message-ID: <F001.003112A1.20010528104553@fatcity.com>

Just pulled up this info from Oracle Docs.... Well, If you could give some inputs as to the performance issues that u r facing bacause of this - it would be useful. Also, what type of application are u running?

Here is the info:

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Reducing Contention for Redo Copy Latches On multiple-CPU computers, multiple redo copy latches allow multiple processes to copy entries to the redo log buffer concurrently. The default value of LOG_SIMULTANEOUS_COPIES is the number of CPUs available to your Oracle instance.
If you observe contention for redo copy latches, add more latches by increasing the value of LOG_SIMULTANEOUS_COPIES. It can help to have up to twice as many redo copy latches as CPUs available to your Oracle instance.

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Rajaram.

-----Original Message-----
From: Raghu Kota [SMTP:raghukota_at_hotmail.com] Sent: Monday, May 28, 2001 1:26 PM

To:     Multiple recipients of list ORACLE-L
Subject:        redo copy latch low??

Hi Friends

My redo copy latch showing 16.7% (Hit Ratio). How can I increase this one?? Any suggestions?? I got this from utlb/utle stats.

Thanks
Raghu.

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Received on Mon May 28 2001 - 12:43:36 CDT