AIX

I am constantly getting request to run reports on our AIX server for system health (cpu, io, memory, etc) when users experience performance issues. We are using SolarWinds to monitor system health and it works great for cpu and disk space; however, I cant seem to get memory and io to work correctly. In SolarWinds memory usage shows 100 % on all servers (im guessing this is comp and noncomp that = 100%)

Anybody have ideas for monitoring memory and io? I usually get requests to run a report for the past 24 hours.

yes of course - run nmon in non-interactive mode as daily cronjob, than run it through nmon analyzer and you are done

if you want to run real time - in case of slow server - run vmstat -Iwt 2 - the avm value is computational memory in 4k pages and you can see the scan / free, paging and cpu values too

Regards
zxmaus

Run nmon -f (runs in background for 24 hrs) to get the nmon report and then use nmon parser to get the detailed information about Disk, IO and CPU utilization for a single day.

Also, check for iostat, vmstat, topas if you see whats happening in the system right now.

Sounds good. Thanks for the advice.

Check the AIX Performance and guide. Also note that AIX memory will always show memory 100%.

svmon
sar
lparstat

Putting it as simply as possiblr: Memory in AIX is allowed to fill up by the Memory Manager until it reaches the minfree number of pages free ( which you can see from the vmo command). It will then clear out pages until it reaches maxfree (another vmo command).

What is of interest is the scan rate that zxmaus suggests which shows the number of pages that AIX has to look at to find the free pages that it needs to reach the maxfree.

You can also look at the

Code:

svmon -G

command to work out how much non computational space you have, or else on AIX 6.1 the amepat command provides some useful memory statistics.