It is predominately a file server +600GIG. The OS is SUSE 10.1 (Novell). David Dean Information Systems *bcbstauthorized*
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Rich Smrcina Sent: Monday, September 29, 2008 12:46 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Performance question It appears there's alot of cache usage. What's running on this machine? -- Rich Smrcina VM Assist, Inc. Phone: 414-491-6001 Ans Service: 360-715-2467 rich.smrcina at vmassist.com http://www.linkedin.com/in/richsmrcina Catch the WAVV! http://www.wavv.org WAVV 2009 - Orlando, FL - May 15-19, 2009 Dean, David (I/S) wrote: > Can you give me any insight into making more use of the swap; see below? > We have had systems significantly speed up after adding memory, even > though swap was not being used. I realize that swap / disk is going to > be slower, but with cache and buffers shouldn't it be at least close? > > > lnx057:~ # free -l > total used free shared buffers > cached > Mem: 763208 758572 4636 0 77092 > 592676 > Low: 763208 758572 4636 > High: 0 0 0 > -/+ buffers/cache: 88804 674404 > Swap: 1079896 300 1079596 > > > Thank you for any help. > > David Dean > Information Systems > *bcbstauthorized* > > > > -----Original Message----- > From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On > Behalf Of Barton Robinson > Sent: Monday, September 29, 2008 1:23 PM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: Performance question > > Best practices is to use Vdisk for swap, and reduce linux virtual > machine sizes - not to > buy more REAL z/VM memory unless you really need it. "101% memory > useage" means almost > nothing. It is not relevant to performance or capacity, and thus > shouldn't have business > decisions or performance decisions decided based on that number. > > > > > Dean, David (I/S) wrote: > >> My SLES 10.1 zLinux servers have been notorious for not making much > use >> of the swap space, even when we lower the main (virtualized) in the > USER >> DIRECTORY. We may have something just not configured optimally >> somewhere, but our luck has gone with adding main Linux memory and >> subsequently having to add ZVM memory. >> >> >> >> David Dean >> >> Information Systems >> >> *bcbstauthorized* >> >> >> >> >> >> >> >> ________________________________ >> >> From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] > On >> Behalf Of Mary Anne Matyaz >> Sent: Monday, September 29, 2008 11:31 AM >> To: IBMVM@LISTSERV.UARK.EDU >> Subject: Performance question >> >> >> >> If your VM system is at 101% memory usage, and you are overcommitted > by >> about 14%, is it worthwhile to add >> a vdisk to a linux for swap space, or better just to add main memory > to >> the linux? >> >> MA (Looking for opinions, thoughts, rationalizations, whatever. :) >> >> Please see the following link for the BlueCross BlueShield of > Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm > Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm > Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm
