Hello all,
One of our customer has a very strange caching issue one just one of their servers that runs my companies software. Every 30 seconds it is dumping/trimming the cache. I'm not sure the exact term. Aside from that making no sense to me, it
breaks our software. Our software has a thread that runs to see if our stuff is still in cache, and if not loads it. Well when your cache is emptying but 10-20GB every 30 seconds, and you have a program trying to load that back each time it empties
itself you end up with a CPU that is pegged while the software is trying over and over to reload it's stuff. We have two servers running the software at that customers location (and hundreds of other customers) and we've never seen this behavior before.
I have a ticket open with Microsoft support but haven't had an answer yet.

Details are :
Windows 2008R2 Enterprise with latest updates
64 GB RAM
Dual Quad Core XEON
Physical memory usage does not go over 50GB when our software is loaded, when it is not it doesn't go over 1.5GB. The problem occurs
even when our software is not loaded. Right after a reboot it goes into a cycle of trimming the cache every 30 seconds.

Here's a screen cap of task manager:



Promman show the % cache used following that same pattern.

Does anyone know of a setting or piece of software that can cause this behavior? Thank you.

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Hello,
I suggest you check this article once :
http://technet.microsoft.com/en-us/library/cc938590.aspx

& check for memory leaks, if any?. Another useful link :
http://msdn.microsoft.com/en-US/library/x98tx3cf(v=vs.80)Regards
, Ravikumar P

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Thanks for taking the time to answer. I've been through the first, but hadn't seen the second so that is new information to me. A memory leak was our first thought. The problem is we can reboot the box with our software disabled and even
though less than 2 GB of RAM is in use at that point the server still is doing this every 30 seconds. Given the fact that it is happening on such a regular cycle (see the dips in the graph) it seems that has to be a setting of some sort or a program
running that empties it.

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Hello Deja,
Try to update latest BIOS & chip-set drivers once and check for the difference.

Regards, Ravikumar P

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Hello Deja,
Try to update latest BIOS & chip-set drivers once and check for the difference.

Regards, Ravikumar P

Need to support users over the internet? click here try our remote control online beta

Thanks. We will try that tonight, and I'll let you know the results.

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