There is an AIX subforum here btw.
From the vmstat your machine has a lot of CPU traffic, but no memory problem, it seems. Nothing in the pi column (so no paging in from paging space), but tons of runnable threads in the kthr (r) column, more than you have CPUs in your box.
For the memory error of the application you might have to check out in which way the error message is meant ie. follow error code description etc.
Since it is 4 real CPUs you might try to change it to 8 logical CPUs, if this is an DLPAR.
Paging Space info can be obtained by:
Code:
lsps -a
