RE: suggestion, narrow record causing enqueue lock on table
- From: "Lex de Haan" <lex.de.haan@xxxxxxxxxxxxxx>
- To: <GLeonard@xxxxxxxxxxxxx>, "'Oracle-L (E-mail)'" <Oracle-L@xxxxxxxxxxxxx>
- Date: Fri, 25 Feb 2005 11:07:34 +0100
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.
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-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] 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
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George Leonard
Oracle Database Administrator
New Dawn Technologies @ Wesbank
E-mail:gleonard@xxxxxxxxxxxxx
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