RE: log_buffer Value setting NOT effective ?
- From: VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx>
- To: "jason.arneil@xxxxxxxxx" <jason.arneil@xxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 22 May 2008 13:07:49 +0530
Jason, Folks
Even though log_buffer is set to 1M, on Database Startup it is automatically
getting reset to 14MB (shown below)
Qs 1 - Is there a Patch for this Bug?
Qs 2 - Alternatively, Can _ksmg_granule_size be manually set to a small Value
e.g. 1M? Is it safe to do so?
Cheers & Thanks indeed
P.S. Metalink Note:351857.1 posting:-
This is already explained in bug
4592994.<https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_id=4592994&p_database_id=BUG>
In 10.2 the log buffer is rounded up to use the rest of
the granule. The granule size can be found from the
hidden parameter "_ksmg_granule_size" and in your case
is probably 16Mb. The calculation for the granule size
is a little convoluted but it depends on the
number of datafiles etc..
On 21 May 2008, at 21:40, VIVEK_SHARMA wrote:
Folks
Even though log_buffer is set to 1M, on Database Startup it is automatically
getting reset to 14MB (shown below)
NOTE - sga_target=0
NOTE - Online Redo logfile size = 1 GB
Oracle 10.2.0.3
HP-UX 11.31
Any ideas why?
Cheers & Thanks
Vivek
P.S.
SQL> startup
ORACLE instance started.
Total System Global Area 3254779904 bytes
Fixed Size 2048904 bytes
Variable Size 1090522232 bytes
Database Buffers 2147483648 bytes
Redo Buffers 14725120 bytes
Database mounted.
Database opened.
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