((Re)): db_file_mutliblock_read_count and physical IO
- From: ryan.gaffuri@xxxxxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Wed, 18 Aug 2004 18:24:46 +0000
200 MBs. I tried it on a variety of different tables. Many over a a gigabyte.
No difference in total physical IO in my tkprof output. I read the raw trace
file. db_file_scattered_read with a p3 value = 128 and a value = 8(for two
different traces).
so both settings are taking.
-------------- Original message --------------
> Ryan,
> Was the data retrieved less than or equal to 8k? If it was than the
> I/O should be the same as it will only retrieve the data that is needed
> no matter what the db_file_multiblock_read_count(MBRC) is. Try the same
> test making sure that the data you need it larger than the MBRC and
> compare the results.
> Just a thought.
> Ron
>
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx
put 'unsubscribe' in the subject line.
--
Archives are at //www.freelists.org/archives/oracle-l/
FAQ is at //www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------
Other related posts:
