RE: suggestion, narrow record causing enqueue lock on table

From: Lex de Haan <lex.de.haan_at_naturaljoin.nl>
Date: Fri, 25 Feb 2005 11:07:34 +0100
Message-Id: <20050225100737.5A984B3BCE7@ha-smtp0.tiscali.nl>

Hi George,
create the table, insert a few rows, and then issue "alter table ... minimize records_per_block".
from that point onwards, Oracle will only store that number of rows per block, regardless the block/row sizes.
another question: do you *really* need to track all those actions in a table?

kind regards,

Lex.

Visit my website at http://www.naturaljoin.nl

-----Original Message-----

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Leonard, George
Sent: Friday, February 25, 2005 10:45
To: Oracle-L (E-mail)
Cc: Desplace, Laura
Subject: suggestion, narrow record causing enqueue lock on table

Hi all

Got a record that got a average row length of 46 Bytes.

This is basically a record of which records the user is currently editing/accessing in table called user_events.

Ever user that enters a form either inserts into user_events or deletes from it,

Record being very narrow and average record count being <500 ends up in the situation that all records are within a single block,

Now getting 1000 users coming and going all inserting and deleting from this table ends up with a pretty hot block,

Suggestions,

One idea was to change block size from 8K to 2K but still going to leave a lot of records in a single block

George

George Leonard
Oracle Database Administrator
New Dawn Technologies @ Wesbank
E-mail:gleonard_at_wesbank.co.za

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http://www.freelists.org/webpage/oracle-l Received on Fri Feb 25 2005 - 05:10:43 CST