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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Splitting a database: pro and cons
Quick thoughts
Downside
Resource overhead of another instance (system temp tablespace memory etc)
Support requirements
Conectivity between the 2 instances via db_links although if theye are on the same server network traffic is negated
Upside
Upgrade paths can be different which is especially important when different vendors are involved
Service Level Agreements are easier to manage
No performance impact from one application on the other as far as Oracle is concerned (still need to monitor O/S)
Backup strategy - hot cold, archivelog etc can be different as necessary
Tuning can be more specific for each vendor app especially instance wide from the init.ora parameter
I am sure there are lots more
John
-----Original Message-----
From: Djordje Jankovic [mailto:djankovic_at_corp.attcanada.ca]
Sent: 14 August 01 23:52
To: Multiple recipients of list ORACLE-L
Subject: Splitting a database: pro and cons
Hi list,
I have two applications running against one database (in fact I have a few but for the sake of this question two are enough). The two apps have different upgrade patterns and I would like to split them in two databases that will be on the same unix server. There are some views that are used extensively that join data from both apps/schemas, and after the split those should be made using db links. I did some tests and comparisons of queries going through links versus running them directly on the database, and did not see a lot of difference.
Does anybody see or know of any downside in splitting the database in two :-(. And any advantage :-). What is the general strategy when installing different apps (from different vendors) - put them on separate databases or combining them.
Thanks.
Djordje
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Djordje Jankovic
INET: djankovic_at_corp.attcanada.ca
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