Oracle-L: Re: Datafiles

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

James Howerton <jhowerton_at_uabmc.edu> wrote: > DBA's
>
> Has anyone experienced any problems (rman, recovery,
> etc) with
> datafiles larger than 4Gb on Solaris 2.6/ Oracle
> 8.1.6.2???
>
> ulimit = unlimited.
>
> I have write intensive a 70gb database that stores
> MS word docs in a
> long raw table that is currently growing 1Gb per
> week. The associated
> tablespace currently has 18 datafiles and I don't
> want to get carried
> away adding datafiles but making them too large also
> concerns me???
>
> Let me know what y'all think.
>
> ...JIM...
> --
> Please see the official ORACLE-L FAQ:
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> Author: James Howerton
> INET: jhowerton_at_uabmc.edu
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Connor McDonald
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Received on Thu Aug 22 2002 - 14:54:31 CDT

Re: Datafiles > 4gb