On releases of VM prior to 5.2, there won't be much difference -- I/O still has to move below the 2G line. z/VM 5.2 has dramatic improvements in this area (according to the presentations at zExpo a few weeks ago).
> -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of John P Taylor > Sent: Thursday, October 06, 2005 11:21 AM > To: [email protected] > Subject: paging of 64-bit hosts v 31-bit hosts under VM > > I understand that all 31-bit hosts must utilise storage below > the 2G line, and consequently if you have many active hosts > and you over commit storage, your VM system will page, even > if the sum of the working sets of all hosts is say 50% (or > less) . What I'm not so sure about, is whether equivalently > sized 64-bit hosts will page less, any ideas? ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
