Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Splitting a database: pro and cons

RE: Splitting a database: pro and cons

From: Hallas John <>
Date: Wed, 15 Aug 2001 01:34:18 -0700
Message-ID: <>

Quick thoughts
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

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


-----Original Message-----
From: Djordje Jankovic [] 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.



Please see the official ORACLE-L FAQ:

Author: Djordje Jankovic

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
To REMOVE yourself from this mailing list, send an E-Mail message to: (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from).  You may also send the HELP command for other information (like subscribing).

This email and any attachments may be confidential and the subject of legal professional privilege. Any disclosure, use, storage or copying of this email without the consent of the sender is strictly prohibited. Please notify the sender immediately if you are not the intended recipient and then delete the email from your inbox and do not disclose the contents to another person, use, copy or store the information in any medium.
Received on Wed Aug 15 2001 - 03:34:18 CDT

Original text of this message