How is Memory Utilization calculated for AIX server?
Physical Memory Calculation
By default, Applications Manager uses svmon -G command to calculate Memory Utilization for AIX servers
Physical memory utilisation (in %) = (Used / Total ) * 100
= (816124/1957888) * 100
= 41 %
Physical memory utilisation (in MB) = (Used * 4) / 1024
= (816124*4) /1024
= 3187 MB
However, if the key am.servers.aix.physicalmem.memory.inuse is set to true in the am_globalconfig table, an alternate calculation method is used, based on the inuse memory value obtained from the svmon -G command output.
Physical memory utilisation (in %) = (Used / Total ) * 100
= (1828402/1957888) * 100
= 93 %
Physical memory utilisation (in MB) = (Used * 4) / 1024
= (1828402*4) /1024
= 7142 MB
Swap Memory Calculation
Swap memory utilisation (in %) = (Value under pg space, inuse / Value under pg space, size ) * 100
= ( 4939 / 131072 ) * 100
= 3 %
Swap memory utilisation (in MB) = (Value under pg space, inuse * 4) / 1024
= ( 4939 *4 ) /1024
= 19 MB