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Re: Datafiles > 4gb

From: Connor McDonald <hamcdc_at_yahoo.co.uk>
Date: Thu, 22 Aug 2002 11:54:31 -0800
Message-ID: <F001.004BD5DA.20020822115431@fatcity.com>


4G limit discussion aside - generally having any kind of "thing" (segment/datafile/tablespace) get excessively large is asking for trouble. Even the best plans sometimes don't avoid the need for the occasional move/rebuild/etc - and the larger the quanta, the longer the downtime, the larger the risk etc etc..

"Large" is a variable term - I've worked on db's where nothing file/tspace/etc was larger than 1G (the db was only about 40-50G); conversely, I've worked on a larger db where the datafiles were (raw) 12G, and we had 4 to a tablespace, simply because the 48G fitted nicely within on a disk cache used for hot backup...

As a rule of thumb (man I hate that term), I like to keep anything that I might need to take offline (eg file/tspace/table/index/etc) small enough so that I can do the maintenance without massive impact on the users.

hth
connor


Connor McDonald
http://www.oracledba.co.uk
http://www.oaktable.net

"Remember amateurs built the ark - Professionals built the Titanic"



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Received on Thu Aug 22 2002 - 14:54:31 CDT

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