I have a Cognos BI server on a virtual Windows Server 2008 that has 4GB of RAM. For the last year and a half, there's been 60-70% of the physical memory free, with only occasional spikes.
I logged on last week and there was 0 physical memory free. I restarted the Cognos service, and the service would stop but wouldn't start. So I re-booted the server. After the re-boot, I assumed memory levels would return to normal, but they didn't. It's been consistently 0-10% free now for about a week.
I've been through the Windows event logs, and don't see anything that changed. Cognos usage hasn't changed significantly. The big memory hogs are the typical Cognos things (java.exe and BIBusTKServerMain.exe).
I can increase the memory on the server, but before I do, I'd like to know why the memory usage on this server has changed so drastically. What could I look at to try to determine what's causing the problem, -or- how can I get the memory usage back to normal?
Thanks,
Chris Funkhouser
Have you tried running the Resource Monitor over an extended period of time to capture the specifics of memory use on the server? It has a decent help file that will help you create a diagnosis report that may allow you to narrow in on the issues that are affecting this server.
Just a thought....
Dan
Quote from: cfunkho on 21 Feb 2013 09:30:05 AM
I have a Cognos BI server on a virtual Windows Server 2008 that has 4GB of RAM. For the last year and a half, there's been 60-70% of the physical memory free, with only occasional spikes.
That's quite strange, Cognos usually eats up 4Gb fairly quickly (~800 Mb for java.exe and a couple of 1 Gb BiBusTK would do the trick). I can't imagine a Cognos instance with 4GB being 60% free )
I'd recommend extending memory and using perfmon to capture memory usage for a couple of days to determine the main issues.
Sometimes corporate policies bring new updates / antiviruses / monitoring software that can be a burden as well.