Memory and Performance

Top 10 Memory usage process
ps auxw |sort -r +3 |head -10

Top 10 CPU usage process
ps auxw |sort -r +2 |head -10

List size, summary, and paging activity by paging space
lsps -a

List summary of all paging space
lsps -s

List the total amount of physical RAM in system
lsattr -El sys0 -a realmem

Create a new paging device on rootvg of 64 PPs
mkps -a -s 64 -n rootvg

topas Options

Make topas look like top
topas -P

View statistics from other partitions
topas -C View statistics for disk I/O
topas -D

Show statistics related to micro-partitions in Power5 environment
topas -L

All of the above commands are availible from within topas

Get verbose disk stats for hdisk0 every 2 sec
iostat -d hdisk0 2

Get extended vmstat info every 2 seconds
while [ 1 ]; do vmstat -vs; sleep 2; clear; done