Originally posted by: IBMAIXMONITOR

How to find the memory utilization of AIX server using svmon -G output.

Sample output for svmon -G command from my AIX test server,

size inuse free pin virtual
memory 4014080 3995443 18637 575916 1876393
pg space 1179648 6064

work pers clnt other
pin 439189 0 7 136720
in use 1876393 0 2119050

PageSize PoolSize inuse pgsp pin virtual
s 4 KB - 3880787 6064 501484 1761737
m 64 KB - 7166 0 4652 7166

How to find the memory usage. Kindly anyone explain using above example output.

Thanks.
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Originally posted by: Tibor_B

I can not explain it because I dont understand AIX memory management deeply.
On linux it would be simplier but this is not your question.

But when I check if the server has enough memory (it goes slowly, or somebody is complaining) I check following:

paging (vmstat command, columns pi/po) - if any paging is there (usually there are zeros) it means server must send data back and forth from RAM to swap (disk)

Another symptom of RAM shortage is CPU spending time in "Wait state" (=waiting for I/O operations)(column wa in vmstat)

From numbers you posted there I understand mainly line "pg space", if inuse grows - it is bad sign, though the very fact that some data are swapped out is not that bad. Also (near) full pg space indicates that system is going out of memory, that is bad.

So this is my view but I might be mistaken though :)
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