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-----
Sent: donderdag 7 november 2002 14:29
To: Multiple recipients of list ORACLE-L

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-----
<mailto:sfaroult_at_oriole.com> ]
Sent: Thursday, November 07, 2002 1:59 PM To: Multiple recipients of list ORACLE-L

> 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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