RE: SPIN_COUNT - 8i obsolete? What now?

[Jack van Zanen]

Title: RE: SPIN_COUNT - 8i obsolete? What now?

log_buffer has nothing to do with log switches. Just with checkpointing and some other things I can't think of right now.

 

 

Size of online redo logfiles does.

 

Jack

-----Original Message-----
From: Denham Eva [mailto:[EMAIL PROTECTED]]
Sent: donderdag 7 november 2002 14:29
To: Multiple recipients of list ORACLE-L
Subject: RE: SPIN_COUNT - 8i obsolete? What now?

Already running on 100% caffeine_level saturation :)
Maybe your right, the contention could be elsewhere, the other issue I have been investigating is LGWR process? With increasing the LOG_BUFFER from 512 to a Meg in size, as I have at times very high redo log switch, however they average about 3-4 an hour?

Anyway the idea is to keep investigating.

Regards
Denham

-----Original Message-----
From: Stephane Faroult [mailto:[EMAIL PROTECTED]]
Sent: Thursday, November 07, 2002 1:59 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: SPIN_COUNT - 8i obsolete? What now?

> Denham Eva wrote:
>
> Hello Guru's
>
> I have run a script which indicates that of the three redo log latches
> two had occurences of sleeps. To overcome this usually you increase
> SPIN_COUNT by 50% or so.
>
> When trying to ALTER SYSTEM SET SPIN_COUNT = 3000;
> Present system is set as 2000. I get the following error.
> *
> ERROR at line 1:
> ORA-25138: SPIN_COUNT initialization parameter has been made obsolete
>
> Now what? what can I do to overcome the sleeps issues?
>

Increase caffeine_level. Seriously, is it a problem? A real bottleneck?
You should begin to worry if you do not have worse contention elsewhere.
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Author: Stephane Faroult
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