drop_caches in SLES 9 ?

2009-05-08 Thread Tomasz Westrych
Hi all, How to clear memory cache in Sles 9 ? In SLES10 you can do echo 3 /proc/sys/vm/drop_caches. In SLES9 I, don't see drop_caches. We have z/VM 5.4 + SLES9 version 2.6.5-7.244-s390x. Thanks, Tom -- Dzwonki na komorkj!

Re: drop_caches in SLES 9 ?

2009-05-08 Thread Rob van der Heij
2009/5/8 Tomasz Westrych tomw...@poczta.fm: How to clear memory cache in Sles 9 ? In SLES10 you can do echo 3 /proc/sys/vm/drop_caches. In SLES9 I, don't see drop_caches. We have z/VM 5.4  + SLES9 version 2.6.5-7.244-s390x. Right. This is a more recent addition to Linux memory management,

Re: Cpuplugd-setting CPU_MIN to 1

2009-05-08 Thread Rob van der Heij
On Mon, May 4, 2009 at 5:21 PM, Ron Foster at Baldor-IS rfos...@baldor.com wrote: I have been using the supplied example that had the minimum number of CPUs set to 2. I don't think there is a real reason for having the minimum at 2. Earlier this week I raised the question why would you ever

Re: Cpuplugd-setting CPU_MIN to 1

2009-05-08 Thread Harder, Pieter
With Linux on z/VM I do like the idea that reduced number of CPUs may improve chances of the virtual machine drop from queue nicely. But recent SAP releases have stuff that makes even the virtual 1-way stay in-queue, so there it does not help anymore. And now for the really stupid question: does

Re: DR and Linux native lpar

2009-05-08 Thread Alan Schilla (OET)
I have been giving this some thought lately too. I have been planning to extract the cpu serial number from /proc/cpuinfo. This should tell me whether or not I am on my normal production hardware. The problem I have with this is remembering that I need to change the script when we move zVM or

Re: drop_caches in SLES 9 ?

2009-05-08 Thread Brad Hinson
Rob van der Heij wrote: 2009/5/8 Tomasz Westrych tomw...@poczta.fm: How to clear memory cache in Sles 9 ? In SLES10 you can do echo 3 /proc/sys/vm/drop_caches. In SLES9 I, don't see drop_caches. We have z/VM 5.4 + SLES9 version 2.6.5-7.244-s390x. Right. This is a more recent addition to

Re: Cpuplugd-setting CPU_MIN to 1

2009-05-08 Thread Rob van der Heij
On Fri, May 8, 2009 at 1:25 PM, Harder, Pieter pieter.har...@brabantwater.nl wrote: And now for the really stupid question: does enabling cpuplugd with CPU_MIN=1 actually gain something? I have turned it on for one of my SAP dyadics and my idle level seems to have gone up instead of down. I

Re: DR and Linux native lpar

2009-05-08 Thread Ron Foster
How about the LPARNAME in /proc/sysinfo. Ron Sent via BlackBerry by ATT -Original Message- From: Alan Schilla (OET) alan.schi...@state.mn.us Date: Fri, 8 May 2009 08:10:06 To: LINUX-390@VM.MARIST.EDULINUX-390@VM.MARIST.EDU Subject: Re: DR and Linux native lpar I have been giving this

2009-05-08 Recommended Linux on System z code and manuals drop to developerWorks

2009-05-08 Thread Gerhard Hiller
Please refer to: http://www.ibm.com/developerworks/linux/linux390/whatsnew.html ... for the 2009-05-08 change summary with code patches and new/ updated documentation. * end of message Mit freundlichen Grüßen / Kind regards

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Sam Bass
We have a LPAR z/Linux SLES 10sp1 and a z/VM z/Linux SLES 10sp2. We don't want these to see each others disk (LVM). Right now I have them on different channels on our z9. I found some old documentation on ACT but I cannot find exactly how to use it.

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Sam Bass
It is zfcp. No we do not have NPIV turn on since we just upgraded the SVCs this week (and the old one did not support NPIV (IBM 2145 firmware v3) and the new SVCs are loaded with latest V4. We will have the same issue of access once we move the LPAR z/Linux under z/VM. Sam -Original

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Romanowski, John (OFT)
Have you looked at the Configuration Utility for FCP LUN Access Control User's Guide SC33-8280-00? it explains how to install and use the Configuration Utility for FCP LUN Access Control which you'd use to create and maintain ACT's -Original Message- From: Linux on 390 Port

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Mark Post
On 5/8/2009 at 12:22 PM, Sam Bass sam.b...@mclaneco.com wrote: We have a LPAR z/Linux SLES 10sp1 and a z/VM z/Linux SLES 10sp2. We don't want these to see each others disk (LVM). Right now I have them on different channels on our z9. I found some old documentation on ACT but I cannot

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Sam Bass
I think that we need to use /etc/lvm/lvm.conf to limit what z/linux can see. Sam -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post Sent: Friday, May 08, 2009 11:41 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: SLES 10 SP2 - where do I find

Re: SLES 10 SP2 - where do I find documentation on Access Control Table (ACT)

2009-05-08 Thread Mark Post
On 5/8/2009 at 1:45 PM, Sam Bass sam.b...@mclaneco.com wrote: I think that we need to use /etc/lvm/lvm.conf to limit what z/linux can see. That would be helpful, but you'll need to make sure that, whatever persistent device naming method you use, you don't wind up with duplicate device

Re: drop_caches in SLES 9 ?

2009-05-08 Thread Rob van der Heij
On Fri, May 8, 2009 at 3:26 PM, Brad Hinson bhin...@redhat.com wrote: https://bugzilla.redhat.com/show_bug.cgi?id=444961 Patch was committed to 2.6.25-mm1, so for anyone making heavy use of drop_caches, make sure to update to RHEL 5.3 (or the kernel at least). Right. Thanks Brad. I should