The procedure to increase the pthreads limit on SGI systems is as follows:

 1. su root
 2. # systune -i  (puts you in systune utility interactive mode)
 3 systune> rlimit_pthreads_max <new value> 
 4 systune> rlimit_pthread_cur <new value> (at least 4096 recommended)
 5 systune> quit
 6 reboot