Mark,
Thanks Indeed for responding
My Replies(ANS.) are Given Below your Questions in CAPITALS :-
-----Original Message-----
From: Mark Leith [SMTP:[EMAIL PROTECTED]]
Sent: Friday, February 16, 2001 5:30 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: Best Practices for Partitions ?
Vivek
Take a look at Steve Adams' site here
http://www.ixora.com.au/tips/design/partitioning.htm
It gives some good advice when considering partitioning, which I
infact read
through this morning.
Composite or Range?
ANS. ALL TABLES PARTITIONED BY RANGE
Well, what kind of data does this table hold,
ANS. WE ARE CONSIDERING PARTITIONG ALL THE 400 TABLES BASED ON
PARTITION KEY "BRANCH_ID"
DISTRIBUTION OF DMLs :-
PRIMARILY INSERTS & SELECTS
UPDATES - RELATIVELY SMALL
DELETES - NEGLIGIBLE
NOTE - THIS BEING A BANKING APPLICATION . VARIOUS BRANCHES OF A BANK
SPREAD ACROSS THE COUNTRY
LOG INTO THE CENTRALISED DATABASE .
what are you trying to achieve from a partitioned table?
FOR OPS WE ARE PARTITIONING THE DATA TO PREVENT CONTENTION AS THE 2
INSTANCES WILL ACCESS
DIFFERENT PARTITIONS BASED ON "BRANCH_ID" .
OPS BEING CONSIDERED PRIMARILY FOR SCALABILITY .
QS. WHICH INDEXES ARE ADVISABLE IN SUCH A SCENARIO , LOCAL OR GLOBAL
?
It more depends on the
nature of your DATA.
Steve's jist, is that if you have a table partition, you should also
have an
index that refers to that table partition, as this will also help
with
maintenance operations etc. If you have an index for the partitioned
table
as a whole, and decided to reorg one partition, which could be old
data,
then you would also have to reorg the entire index - which could
result in
user problems. If you have a partition specific index, you could
just reorg
each specific partition without affecting performance on the whole.
Correct me if I'm wrong Steve..
Regards
Mark
-----Original Message-----
VIVEK_SHARMA
Sent: Friday, February 16, 2001 06:40
To: Multiple recipients of list ORACLE-L
Qs. Are Composite Partitions Better than Range partitions as a
General rule
?
OR is it dependent on Nature of Business/Application ?
Qs. For Tables which are partitioned , is it advisable to Partition
their
Corresponding Indexes Also with the Same Respective Key Values List
?
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Author: VIVEK_SHARMA
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