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тАО03-23-2006 04:11 PM
тАО03-23-2006 04:11 PM
Memory usage is always high
I am using DS15 server
Compaq Tru64 5.1
Physical Memory 512MB
Swap 4096MB
although memory is quite less but it always shows near 90%.I thinks there can be a memory leak so any one can tell me how to confirm if there is any memory leak or some other problem.
Thanks
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тАО03-23-2006 04:44 PM
тАО03-23-2006 04:44 PM
Re: Memory usage is always high
A memory leak normally appears as a process
whose virtual memory size keeps increasing.
Unused memory is a waste of good silicon.
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тАО03-24-2006 12:36 AM
тАО03-24-2006 12:36 AM
Re: Memory usage is always high
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тАО03-24-2006 01:39 AM
тАО03-24-2006 01:39 AM
Re: Memory usage is always high
Only when combined with increasing swap usage would I be concerned about memory leaks. In that case a vmstat report woudl also showongoing, undesirable, pin and pout rates.
Tru64 may simply be trying to optimally use the memory, notably for the UBC cache.
The maximum for this is controlled through a dynamic sysgen param max_ubcpercent and default setting for this system param is to allow it to use 100% of the memory. So the system may well be workgin as intended.
To check the settings for yoru system try:
sysconfig -q vm | grep ubc
These days 512 MB is a modest amount of memory, so it feels ok for me to see teh ubc cache to max out on your system.
For further info check the man pages, or google: +tru64 +ubc_maxpercent
This will lead to for example:
http://www.phys.uu.nl/DU/Tru64_5.0/HTML/ARH9GATE/CHVMXXXX.HTM
hth,
Hein.
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тАО11-28-2007 04:19 PM
тАО11-28-2007 04:19 PM