RE: Partition Question
- From: "Mark W. Farnham" <mwf@xxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 23 Jun 2004 14:32:10 -0400
nice articles.
one more thing: Everyone who has ever asked me to put up a 12 component
cyclical based on month really wanted at least 13, and usually 16 (which is
5 complete rolling quarters plus a place for the newest inserts.)
By making each component its own tablespace or two (where component may
refer to several periodically cycled table and index partitions), you can
also have the luxury of making components read only and taking them off line
or relegating them to read only media for reference. With one a month, there
is a good chance that Oracle will stay ahead of you with the practical
limits for reasonable processing on the number of partitions.
You may also want to join the voting pool that would like Oracle to be able
to efficiently assemble global indexes from indexes local to a partition, so
that if you have cross partition access needs, you'll have a reasonable way
attack them.
mwf
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Yen, Eric
Sent: Wednesday, June 23, 2004 2:26 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: Partition Question
Two real solid article on how to do this and real life considerations.
http://www.dbazine.com/nanda6.shtml
http://www.dbazine.com/nanda7.shtml
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Lex de Haan
Sent: Wednesday, June 23, 2004 10:30 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: Partition Question
Hi Hamid,
this sounds like range partitioning to me ...
if you say you want to always have 12 partitions,
I am getting a little bit "nervous" --
I guess you mean that you want to add a new partition each time,
while dropping one partition at the end, right?
in other words, you don't "reuse" partitions.
=20
Kind regards,
Lex.
=20
---------------------------------------------
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=20
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Hamid Alavi
Sent: Wednesday, June 23, 2004 18:28
To: 'Oracle-L (E-mail)
Subject: Partition Question
List -
I have a column in all of my tables named partition_date but I want to
partition tables based on the Month of this Date any body have any Idea?
I want to have always 12 partition for each table Independent from a
date
Just Month .One partition for month 01, another for Month 02 etc till
Month
12 then the next year is back again to Month 01 with using the partition
date in each table my partition_date is TRUNC(sysdate).
Thanks,
Hamid Alavi
Office : 818-737-0526
Cell phone : 818-416-5095
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