On AIX
— List number of max processes allowed per user
$ /home/oracle:$ /usr/sbin/lsattr -E -l sys0 -a maxuproc
maxuproc 2048 Maximum number of PROCESSES allowed per user True

The value returned by ulimit may not always match so use the value returned by lsattr.

To change the value of user process by running chdev
$ chdev -l sys0 -a maxumproc=new_limit

• General DBA
• Unix