http://blogs.technet.com/andym/archive/2008/12/04/powerpath-5-2-and-mpio -causing-npp-leak.aspx
You could downgrade, but it was recommened to me since we are using DMX based storage to upgrade to Powerpath V5.3 with the new MPIO.sys driver 1.23 accordingly ( Came straight from a T3 Lead on the performance team that has been troubleshooting this exact problems for a while and authored some of the Microsoft KB Articles accordingly.) There is a possibility that V 5.1 is also an issue, you would have to take a look at the MPIO.sys driver ( possible V1.21?) with the V5.1 Powerpath might still be an issue. My suggestion would be to re-engage with your SAN maintence folks, and look at testing the new V5.3 with the new MPIO.sys driver accordingly, and see if you can fore-go a Back-rev of the MPIO.sys driver, and go to the latest one. Z Edward Ziots Network Engineer Lifespan Organization MCSE,MCSA,MCP+I, ME, CCA, Security +, Network + ezi...@lifespan.org Phone:401-639-3505 ________________________________ From: Sean Martin [mailto:seanmarti...@gmail.com] Sent: Tuesday, June 30, 2009 1:46 PM To: NT System Admin Issues Subject: Re: For those that use multipathing solutions with your servers NON Paged memory pool leak Is there any documentation indicating PowerPath ver 5.1 is affected? We're in the process of performing our annual SAN Maintenance Service through Dell and their recommendation, based on their analysis of our SP Collects from our EMC CX700s, was to downgrade any hosts running Power Path 5.2 to ver 5.1. - Sean On Tue, Jun 30, 2009 at 8:44 AM, Ziots, Edward <ezi...@lifespan.org> wrote: I can tell you if you are using EMC Powerpath, I would recommend if at all possible moving up to V 5.3 from V5.1 or V5.2 accordingly. From the Tier 3 Performance team lead I spoke with yesterday who wrote the KB articles and has been dealing with the various vendors on getting the MPIO.sys updated to deal with the NPP leak, the following MPIO.sys should fix the issues seen in 1.21 and 1.22 of the MPIO.sys. The file is MPIO.sys, and its version is 1.23.3790.2451 and was distributed by Microsoft, and is apart of the EMC Powerpath V5.3 package. As for other vendors, you can see what version of the multipathing DLL"s you are using with Process Explorer, Enable Lower Pane View and pick DLL's to show, then click on the system process and look at what is loaded on your system, it should spell it out for you accordingly. Z Edward Ziots Network Engineer Lifespan Organization MCSE,MCSA,MCP+I, ME, CCA, Security +, Network + ezi...@lifespan.org Phone:401-639-3505 ________________________________ From: Brian Desmond [mailto:br...@briandesmond.com] Sent: Tuesday, June 30, 2009 12:33 PM To: NT System Admin Issues Subject: RE: For those that use multipathing solutions with your servers NON Paged memory pool leak Yeah - here is the KB on the bug http://support.microsoft.com/kb/961640 Thanks, Brian Desmond br...@briandesmond.com c - 312.731.3132 From: Miller Bonnie L. [mailto:mille...@mukilteo.wednet.edu] Sent: Tuesday, June 30, 2009 11:29 AM To: NT System Admin Issues Subject: RE: For those that use multipathing solutions with your servers NON Paged memory pool leak Yeah, usually the first thing I've notice is that when you RDP to a system and it kicks you back to the logon screen with no error, but no connect. You can go back to the server and log on just fine, and a reboot would clear the problem. On file servers we also get people that start to get strange "out of quota" messages, but then they can reconnect in a minute and things work. Am I correct in reading this is a WS03 issue and not WS08? There is no newer ISCSI initiator (yet) for WS08. We finally have our new Equallogic PS6000s online with a new WS08 failover cluster using MPIO and I want to make sure this isn't going to affect us. -Bonnie From: Brian Desmond [mailto:br...@briandesmond.com] Sent: Tuesday, June 30, 2009 9:23 AM To: NT System Admin Issues Subject: RE: For those that use multipathing solutions with your servers NON Paged memory pool leak There are also issues with HP and probably the other major vendors in this space. There was a bug in the MS library they are all linked to. A lot of things can happen aside from that symptom below when you run out of nonpaged pool. A good indicator is if you see the SRV events (2019 or 202, I forget which one) saying you're out. Machines can hang, apps can stop working, etc. Thanks, Brian Desmond br...@briandesmond.com c - 312.731.3132 Active Directory, 4th Ed - http://www.briandesmond.com/ad4/ <http://www.briandesmond.com/ad4/> Microsoft MVP - https://mvp.support.microsoft.com/profile/Brian <https://mvp.support.microsoft.com/profile/Brian> From: Ziots, Edward [mailto:ezi...@lifespan.org] Sent: Tuesday, June 30, 2009 6:34 AM To: NT System Admin Issues Subject: For those that use multipathing solutions with your servers NON Paged memory pool leak All, http://seer.entsupport.symantec.com/docs/317378.htm http://blogs.technet.com/andym/archive/2008/12/04/powerpath-5-2-and-mpio -causing-npp-leak.aspx The culprit in EMC land is the 5.2 and 5.2 SP1 PowerPath Drivers ( MPIO.sys of 1.22.3790.2358) and the EMCMPIO.sys of 5.2.1.6 (5.2 SP1) The fix: Move up to EMC multipath drivers Version 5.3 which will load Microsoft's MPIO.sys updated to 1.23.3790.2451 which seems for the time being to address the Non-Page Memory Pool leak, this was driving one of my Exchange 2003 SP2 2-node clusters insane over the last few months, it was discovered if the NON-Paged Memory counter you see on the Task manager gets about 106-108MB for a X86 32bit system, the http service for the Exchange Cluster will fail, and cause the Exchange group to fail because the resource is marked to affect the group. HTH with some folks out there, Z Edward Ziots Network Engineer Lifespan Organization MCSE,MCSA,MCP+I, ME, CCA, Security +, Network + ezi...@lifespan.org Phone:401-639-3505 ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
