we consolidate oracle homes where possible. this is just to save on
space/upgrade time etc.
we do this knowing that if need we can easily add a new home & move a sid
btw, i dont think binaries are even loaded many times, they stay resident
for the most part
for us, mission critical apps always get their own box so sharing oracle
homes for them is never an issue (ie i would not share oracle homes where
up-time is important)
"Mercadante, Thomas F"
Sent by: oracle-l-bounce_at_freelists.org
09/29/2004 02:26 PM
Please respond to thomas.mercadante
To: "'achoto_at_american.edu'", oracle-l_at_freelists.org
Subject: RE: What are the implications of having several instances on a se rver
sharing the oracle home?
There are at least two things to consider.
If all of your applications are home grown, then sharing one Oracle home
appropriate. The implication here is that when you choose to migrate to a
new version of the database software, that all of these database can go at
the same time.
If your application are store-bought, then you have another thing to worry
about. Typically, store-bought applications will declare capatability
the Oracle level at different times. In this case, I would think you
want different Oracle homes.
In all cases, I have never heard of (nor *every* worry about) binary
contention issues between databases. This is a new one on me. Sounds
an old main-framer talking!! :)
Oracle Certified Professional
From: Ana Choto
Sent: Wednesday, September 29, 2004 2:13 PM
Subject: What are the implications of having several instances on a server
sharing the oracle home?
My boss thinks that this could cause problems. I say it's OK to have, say
three Oracle instances (or more) sharing the binaries, as long as we have
enough memory and space. He thinks we should install the software for
instance to alleviate contention for the binaries. Space is not an issue
for him. The problem with this setting is that I will have to apply
to all of them.
I have on a server four databases, three of them share the binaries, they
are on 9iR2, and I also have a 10G instance on its own oracle home. The
DBs are not heavily used so I can't tell if there is performance issues
them. I don't see a problem with the 10G db, although no one but me is
On another server I have three databases in their own oracle home. Two
instances run on 22.214.171.124, one is the datawarehouse and the other one is
oltp. No performance problems there. Another oltp database (9iR2)
on the server, and I don't see any performance issues there either.
Is someone out there willing to share his/her experiences with any of
Ana E. Choto
e-Operations - Information Technology
Phone (202) 885-2275
Fax (202) 885-2224