Re: Virtual vs. Physical Memory in ZVM

2009-08-20 Thread Rob van der Heij
On Thu, Aug 13, 2009 at 10:44 PM, P Szosw...@gmail.com wrote: On Thu, Aug 13, 2009 at 4:03 PM, Dean, David (I/S)david_d...@bcbst.com wrote: Thank you, the problem however is exactly what you allude to, what size do they REALLY need to be.  IBM is comparing WebSphere RAM needs between AIX,

Virtual vs. Physical Memory in ZVM

2009-08-13 Thread Dean, David (I/S)
HELP! Warning -the below is from an IBM rep, the name removed to protect the innocent(?). This is a portion of the analysis comparing real (physical) memory needs for zLinux guests versus AIX. The 2:1 ratio used below (in my humble opinion) is extreme overkill. I need the experts (you) to

Re: Virtual vs. Physical Memory in ZVM

2009-08-13 Thread Marcy Cortes
@LISTSERV.UARK.EDU Subject: [IBMVM] Virtual vs. Physical Memory in ZVM HELP! Warning -the below is from an IBM rep, the name removed to protect the innocent(?). This is a portion of the analysis comparing real (physical) memory needs for zLinux guests versus AIX. The 2:1 ratio used below

Re: Virtual vs. Physical Memory in ZVM

2009-08-13 Thread Dean, David (I/S)
:31 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Virtual vs. Physical Memory in ZVM David, I don't think anything stated below is wrong. I would question whether you really need those guests to be 6G. Our WAS 6.1 guests range from 1G-8G, with the majority of them in between 1G and 2G

Re: Virtual vs. Physical Memory in ZVM

2009-08-13 Thread Brian Nielsen
@LISTSERV.UARK.EDU Subject: Re: Virtual vs. Physical Memory in ZVM David, I don't think anything stated below is wrong. I would question whether you really need those guests to be 6G. Our WAS 6.1 guests range from 1G-8G, with the majority of them in between 1G and 2G. The overcommittment

Re: Virtual vs. Physical Memory in ZVM

2009-08-13 Thread Marcy Cortes
...@listserv.uark.edu] On Behalf Of Dean, David (I/S) Sent: Thursday, August 13, 2009 1:04 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] Virtual vs. Physical Memory in ZVM Thank you, the problem however is exactly what you allude to, what size do they REALLY need to be. IBM is comparing WebSphere RAM needs

Re: Virtual vs. Physical Memory in ZVM

2009-08-13 Thread P S
On Thu, Aug 13, 2009 at 4:03 PM, Dean, David (I/S)david_d...@bcbst.com wrote: Thank you, the problem however is exactly what you allude to, what size do they REALLY need to be.  IBM is comparing WebSphere RAM needs between AIX, Windows, and zLinux.  We have historical data that help us