Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Performance tuning

RE: Performance tuning

From: Hallas, John <HallasJ_at_logicae.com>
Date: Wed, 30 May 2001 08:20:47 -0700
Message-ID: <F001.0031360D.20010530055055@fatcity.com>

FOR YOUR INFORMATION ESIS and EPFAL are now part of Logica. The Internet email addresses of the staff has changed to the following - lastnameinitial_at_logica.com eg SMITHK_at_logica.com. Emails using the old format will continue to be delivered until 30th June 2001.

Peter McLarty wrote
"Are you running RAID and if so what configuration. (Not RAID 5 I hope)"

Interesting. I am posting an excerpt from Doc 97597.1 Optimising Raid performance for Oracle RDBMS on NT

RAID 5 is useful for Oracle datafiles but not for redo log files or rollback segments which are sequentially accessed. Datafiles belonging to the temporary tablespace are not suitable for a RAID 5 device. More benefits will be seen in situations where reads predominate over writes.

I know that in this instance it is a data load that is being discussed but presumably once the data is loaded then it will be read more than once.

Certainly the tone of the note suggests that raid 5 is not a definite no-no rather a 'be cautious as to which files are placed where'. It is my belief that often a single raid level is set for all files rather than a mix of raid 1 and raid 5 as appropriate.

Peter, I fully agree that the level of memory utilised here is totally insufficient and is very likely to be the constraining factor in this case.

John

This e-mail and any files transmitted with it, are confidential to Logica and are intended solely for the use of the individual or entity to whom they are addressed.
--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: Hallas, John
  INET: HallasJ_at_logicae.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). Received on Wed May 30 2001 - 10:20:47 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US