2gb would be a good starting point. When we did a POC, we had a little over 7gb available and we could run 3 Linux guests, running DB2, comfortably.
-----Original Message----- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Vince Getgood Sent: Monday, September 14, 2009 9:53 AM To: IBMVM@LISTSERV.UARK.EDU Subject: How much memory? Hi all, I'm not a VM expert, so forgive me if this seems a newbie quetion. I have a z800 running z/VM, which has two production z/OS guests, and the usual collection of CMS guests (TCPIP / OPERATOR etc). We discovered recently that the z800 has an IFL (long story - don't ask!) and would like to steal some of the 8GB currently allocated to VM, to run up a VM / Linux LPAR for a POC. The two z/OS guests are defined at 256MB & 512MB (Bill Gates, are you watching??), and don't page. In your most esteemed opinion, what could I steal from the VM LPAR withou t hurting it's and the guests performance / making it page? Personally, I think 2GB would be enough. Comments and opinions welcome.
