Memory manager tools in AIX -- Posted by inturi on Wednesday, January 23 2008
lsps Display paging space info
lsps -s to display paging file size
vmstat Display vertual memory stats
vmo Display vertual memory stats and set tunable parameters (new)

ncheck -i
will give the file name

fuser -k will kill all process using the files undur this file system. Useful when unmounting (umount) a file system.

crfs : To add a ndew file system in AIX.
ex: crfs -v jfs -g rootvg -m /jfsjfs -a size=32M -a frag=2048 -a nbpi=1024 -a ag=16
Also look at /etc/filesystem
Also see the command fsdb
defragfs utility on AIX will defragment a JFS2 file system