Obviously, it depends on what you are planning to do with Oracle.
I have Oracle 10g running on Suse 9.1 (64 bit) under z/VM 5.2.
To install, I needed a guest machine of 512MB.
The linux machine is running in 400 MBs, which is about the smallest I can,
easily, make it with:
Oracle 10g
The smallest SGA I could run with was about 150 MB, but that is also with OEM
running.
So far, the only swapping I do is during OEM's rebuild of the tables. There
are scheduled tasks, by default, that OEM does to make sure Oracle is running
efficiently.
When the guest image was idle, VM would trim the working set down under 100
MBs. This was fine for testing as I had 4 Oracle 10g machines, 4 DB2/UDB
machines plus a dozen small Linux servers (FTP, NFS, Samba, etc) in a 1 GB
lpar, with moderate VM paging.
I would not run that way in production....well...depending on the resources
needed for production, I might.
As in we have one Oracle application, that is for 7 users. It was a multiuser
spreadsheet, but it grew. We are trying to consolidate databases to the
mainframe (very slowly). But this application could run well in MS/access. In
this case, 400 MB virtual and paging really doesn't affect this application.
But as more applications are added on, resources will have to be added <G>.
IMHO, for the same level of service, you need less real memory on the mainframe
that you need with Intel. We have one kick-ass I/O subsystem which doesn't
have much performance penalty for accessing dasd as the average Intel world.
Tom Duerbusch
THD Consulting
>>> "Chase, John" <[EMAIL PROTECTED]> 4/4/2007 8:24 AM >>>
Hi, All,
I'm doing some "window shopping" for a possible future "server
consolidation" effort, and one of the initial questions that has arisen
is "how much central storage is needed" to run z/VM, Linux and possibly
Oracle? The initial hardware platform would likely be a z9BC that
currently runs two z/OS LPARs and an ICF. Given current workloads and
projects in progress, an initial foray into the z/VM + Linux world
probably would not occur before the GA date of z/VM 5.3, and two initial
Linux candidates are SLES 10 and RHEL 5. Oracle, if attempted, would
likely be the "most current" release. Specific questions:
1) What is the minimum central storage (memory) required to run z/VM
5.3 and "a handful" of Linux (and possibly Oracle) images?
2) What would be a "comfortable" allocation of central storage for #1?
TIA,
-jc-
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