Aix Memory Managmenet Question

T

tangcov

New Member
Hi Progress Talk,

We have installed additional memory to our f50 from 1.5 gb to 3 gb. We initially monitored it using the nmon utility. We saw that the memory utilization was 20 percent only. Now after running some batch and having them completed. The memory utilization stayed at 100%. Can you please guide me how to check what is wrong. How can I tune the system to release unused memory?

Thank you and best regards,
 
Modern perating systems abhor "free memory". They will find a use for it somehow, somewhere. If all else fails they will use it as a file buffer cache. On the bright side they're also pretty good about giving it back when you have a legitimate use for it... On the not so bright side determining how much RAM is being used to productive purposes by your programs is a decidedly non-trivial task. On AIX your best friend is probably "svmon". In particular try commands like:

svmon -C _progres -nw # how much RAM are your _progres sessions using
svmon -P 1234 -nw # how much RAM is PID 1234 using?
svmon -P 1234 -nwl # who is PID 1234 sharing memory segments with?
 
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