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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Running multiple instances on a [large] server
I can't remember the last time that I saw a server (other than WinNT) running a single instance. My experience is that it's quite normal to run multiple instances on a single server.
One Oracle home per version of Oracle. I'm not sure what the point of a separate Oracle home per instance would be.
On the licensing issue --- that's Oracle's call. We have a site license so it's not an issue for me.
Hemant K Chitale
<hkchital To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
@singnet.com.sg> cc:
Sent by: root Subject: Running multiple instances on a [large] server
03/11/2003 03:48
AM
Please respond
to ORACLE-L
One of the teams here is planning to run anything from 8 to 16 database instances [no indication on sizing yet, but gut-feel SGAs are 200MB to 1GB and DB sizes 500MB to 40GB] on a "large" server, something like a Sun E6800 or an equivalent HP or Fujitsu server.
My positioning is
a. We might not be able to create 8 partitions but
partition such that we have a max of 2 or 3 instances
in one partition. Hopefully, I can dynamically change
CPU partitioning to reallocate CPU to another group
of instances.
b. Each instance should have it's own ORACLE_HOME. [Disk space is not a constraint].
c. Just add up the number of CPUs on the server, across all partitions, and buy a CPU license. Also, a CPU license is much preferable to Named-User as some of these databases would host Portals for 1,000+ end-users.
Hemant K Chitale
http://hkchital.tripod.com
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