Defining system limits
You can customize your BPXPRMxx member of SYS1.PARMLIB to provide the performance needed for the way your installation uses kernel services.
Table 1 lists the system-wide and process-level limits that can be set
in BPXPRMxx. Not all of the statements are explained in this table. For a complete description of
each statement, see BPXPRMxx (z/OS UNIX System Services parameters) in z/OS MVS Initialization and Tuning Reference. If you specify the SHRLIBMAXPAGES
parameter, it will be accepted but will not have any impact on the system. The value that you
specify will never be reached, because user-shared library objects are no longer supported.
| System-wide limits | Process-level limits |
|---|---|
| IPCMSGNIDS | MAXASSIZE |
| IPCMSGQBYTES | MAXCORESIZE |
| IPCMSGQMNUM | MAXCPUTIME |
| IPCSEMNIDS | MAXFILEPROC |
| IPCSEMNOPS | MAXIOBUFUSER |
| IPCSEMNSEMS | MAXPROCSYS |
| IPCSHMMPAGES | MAXPROCUSER |
| IPCSHMNIDS | MAXQUEUEDSIGS |
| IPCSHMNSEGS | MAXTHREADS |
| IPCSHMSPAGES | MAXTHREADTASKS |
| MAXASSIZE | |
| MAXMMAPAREA | |
| MAXPIPES | |
| MAXPTYS | |
| MAXUIDS | |
| MAXUSERMOUNTSYS. The limit is sysplex-wide when it is in the shared file system configuration. | |
| MAXUSERMOUNTUSER. The limit is sysplex-wide when it is in the shared file system configuration. | |
| SHRLIBMAXPAGES | |
| SHRLIBRGNSIZE |