I am troubleshooting an server with high nonpaged memory pool usage. it has 4 GB of physical RAM with server 2003 R2 sp2 . I am running the Microsoft Exchange Server 2003, and i have to run under /3GB /userav=3300 boot.ini switch. So I am limited do ~128 MB of nonpaged memory pool maximum. and sometimes my memory goes upto 109 MB and http connection is refused as the NPP memory availabe is below 20 MB. When I start the PoolMon, it shows that 49 MB of nonpaged pool is being used by the MmCm tag . i have around 400 mailboxes in the exchange. is this expected for for exhcnage Mmcm tag to consume that much of resources ? or is there a way i can reduce it? Thank all

Are you using /userva=3030 or /userva=3300? It should be /userva=3030Jim McBee - Blog - http://mostlyexchange.blogspot.com

it is 3030 i mis-typed it thank you for the correction

When did you notice this start happening? Many noticed this after applying Windows 2003 SP2 as the Scalable Networking Pack was introduced. KB948496 was released shortly after to mitigate the issues that the SNP introduced (i.e. disabling TCPChimney, TOE, etc).Have you looked to see what driver MmCm refers to and looked for an update to that driver...or if possible remove it all together if its not needed? You can also gain some significant amount of nonpaged memory by dumbing the video driver down to the default svga. It may just mask the problem a little longer though.-alex

it was after i put the switches /3G , i have no idea what MmCm refers to but isn't it If MmAllocateContiguousMemory does find enough memory in the nonpaged pool, it tags the allocation with the MmCm pool tag? is there a way to track what MmCm has loaded the drivers from?

i found that it was because of a bad network driver , it was not releasing the memory and causing the memory leaks and i updated the network driver but now my backup is failing.

That sounds like a typical day for me. Fix one problem, cause another. :-) Is the backup related to the updated network driver? What are the symptons.Jim McBee - Blog - http://mostlyexchange.blogspot.com

Backup just fails saying device error on storage 2