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Home -> Community -> Mailing Lists -> Oracle-L -> RE: cache buffer chains contention
Hi Elain,
This problem is normally caused by a bad SQL statement. Look for high buffer gets in V$SQLAREA and tune the SQL.
@ Regards, @ Steve Adams @ http://www.ixora.com.au/ @ http://www.christianity.net.au/
-----Original Message-----
Sent: Wednesday, 28 February 2001 9:31
To: Multiple recipients of list ORACLE-L
Does anyone have any advice on reducing cache buffer chains latch contention?
>From v$latch_children, I found the children with the highest sleeps and
narrowed that to two tables. A method of reducing the contention is probably
to reduce the number of records per block but that would also mean that now
there will be more blocks to read. Is there any other ways of reducing the
contention? I've tried increasing/reducing _db_block_hash_buckets but that
did not help.
db_block_buffers=40960
_db_block_hash_buckets=db_block_buffers/4
db_block_size=8K
tables' pctfree=30, pctused=40
thanks.
elain
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: elain he INET: elainhe_at_hotmail.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Steve Adams INET: steve.adams_at_ixora.com.au Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Tue Feb 27 2001 - 20:27:56 CST
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