The difference is that the pages in XSTORE have been paged out to the high speed paging device. VM utilizes XSTORE for that purpose and for <DC (if you allow it). The pages cannot be referenced while paged out; they have to be paged in before you can access them. You should treat XSTORE just like you treat DASD paging devices, not like it is the same as main memory.
Regards, Richard Schuh ________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of sunny...@wcb.ab.ca Sent: Thursday, August 20, 2009 2:12 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: where to find the real storage for a linux guest? Thanks Mark, Dave and Thomas. But should I add XSTORE too. We use z10. And there is no difference between storage and xstorage. Or RES already includes the xstore ? From: Mark Post <mp...@novell.com> To: IBMVM@LISTSERV.UARK.EDU Date: 08/20/2009 11:53 AM Subject: Re: where to find the real storage for a linux guest? Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU> ________________________________ >>> On 8/20/2009 at 1:39 PM, <sunny...@wcb.ab.ca> wrote: > I issued ind user XXX > > USERID=TECMWS01 MACH=ESA STOR=1G VIRT=V XSTORE=NONE > IPLSYS=DEV 0100 DEVNUM=00017 > PAGES: RES=00256771 WS=00256757 LOCKEDREAL=00000014 RESVD=00000000 > NPREF=00000037 PREF=00000000 READS=00000646 WRITES=00000646 > XSTORE=005083 READS=024650 WRITES=029733 MIGRATES=000000 > > Could you tell me which one. And how to convert to MB. RES(IDENT) pages = 256771. Each of those are 4KB in size. So, 256771*4096/1024/1024 gives you 1,003MB, or nearly 1GB. Showing once again that Linux will try to use everything you give it. Mark Post Scanned by WCB Webgate1 AntiSpam/AntiVirus email gateway. ________________________________ This message is intended only for the addressee. It may contain privileged or confidential information. Any unauthorized disclosure is strictly prohibited. If you have received this message in error, please notify us immediately so that we may correct our internal records. Please then delete the original email. Thank you. (Sent by Webgate1)
