TOP PROCESSES per MEMORY usage

[tedans]

hi
Is there a way to list the processes eating up the most memory?

Most of the utilities/command (nmon utility) that I'm familiar of only displays the top processes per cpu usage

 

[tedans]

by the way OS version is AIX433. It is configured as the NIS master server

using the nmon utility:
we execute
# nmon433
then choose m and t for Memory and Top process to be shown

the output shows that physical memory is mostly 99% used but the output for the top process by size only shows about 5% usage of memory. How would we know why physical memory is almost 100% used when the top processes just used about 5% of the memory

thanks for anybody who would answer our problem

 

[ogniemi]

http://www.tek-tips.com/faqs.cfm?fid=4668

ps auxw | sort –r +3 |head –10
(Shows top 10 memory usage by process)


ps auxw | sort –r +2 |head –10
(Shows top 10 CPU usage by process)

 

[RodKnowlton]

It should also be noted that AIX uses all otherwise unused physical memory for file page caching, only releasing the memory when needed to keep the free list above minfree. So once a system has accessed (physical memory - (minfree + program allocated memory)) different file pages, the physical memory will remain fully used until a reboot.

In topas, these file cache pages show up as "% Noncomp" under memory.



Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L