On AIX operating systems the concurrent submission of one hundred or more jobs on the same agent can result in a core dump or in a resource temporarily unavailable message

On AIX operating systems if you submit concurrently one hundred or more jobs on the same agent you can receive a core memory dump or the following message:

resource temporarily unavailable

This problem is due to insufficient memory and the process number per user allocated to run the jobs concurrently. To solve this problem, verify the value of the following configuration settings and change them as follows:

Ulimit settings

The submission of a significant number of Java jobs requires a large amount of memory. Change the value for data, stack, and memory limits according to the number of jobs you want to submit. The submission of a significant number of native jobs requires a high number of file descriptors and processes. Change the values for nofiles and processes according to the number of jobs you want to submit. The following example gives possible setting values to submit 100 jobs concurrently:

time(seconds)        unlimited
file(blocks)         2097151
data(kbytes)         131072
stack(kbytes)        32768
memory(kbytes)       32768
coredump(blocks)     2097151
nofiles(descriptors) 4000
threads(per process) unlimited
processes(per user)  unlimited

Process number per user

To submit a high number of jobs concurrently you must have a high value for the maxuproc setting. Use the lsattr -E -l sys0 -a maxuproc command to verify the number of concurrent processes that a user can create. Use the chdev -l sys0 -a maxuproc=<value> command to change the value for the maxuproc setting. For example, to submit 100 jobs concurrently use the following command:

chdev -l sys0 -a maxuproc=500