OCFS2, blockdev and readahead
- From: Vladimir Barac <vbarac@xxxxxxxxxxxx>
- To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Sun, 8 Feb 2009 12:48:25 +0300
Greetings, listers
Oracle 10.2.0.2, OCFS2, single instance database, NetApp FCP disks
filesystemio_options=setall
db_file_multiblock_read_count=128
Do we need to set readahead to greater than 0 for OCFS2? What would be ideal
value? How to measure impact - positive/negative?
Storage admins would prefered "blockdev --setra" to be set to maximum value, to
speed up filesystem backups. On the other hand, since oracle will use O_DIRECT
on OCFS2, I believe we don't need readahead to be set.
Thanks in advance,
Vladimir Barac
Database administrator | Alghanim Industries
P.O. Box 223, Safat 13003, Kuwait
Tel: +965 1881 111 / ext. 2960
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