In some environments it is possible that CPU time is restricted per user process. This can cause the transfer of large files or long-running terminal sessions to fail.
The problem can manifest itself as the signal 29 (
SIGXCPU) error, which
means that the allocated CPU time per process was exceeded.
The global maximum CPU time can be defined in
MAXCPUTIME in the
MAXMMAPAREA(40960) MAXCORESIZE(4194304) MAXASSIZE(2147483647) MAXCPUTIME(2147483647)
SYS1.PARMLIB(BPXPRMxx) values can be easily displayed
with the console command
The CPU time can be defined in the RACF OMVS segment with the
CPUTIMEMAX option as follows:
OMVS INFORMATION ---------------- UID= 0000000000 HOME= / PROGRAM= /bin/sh CPUTIMEMAX= NONE ASSIZEMAX= 0268435456 FILEPROCMAX= NONE PROCUSERMAX= NONE THREADSMAX= NONE MMAPAREAMAX= NONE
In JCL, the CPU time can be defined with the
TIME option. Defining
TIME=1440 sets unlimited CPU time.