IBM WEBSPHERE 6.1.X - Manual (Page 34)

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W E B S P H E R E P O R T A L V 6 . 1 T U N I N G G U I D E
Z / O S
S Y S T E M T U N I N G
In the PARMLIB member BPXPRMxx check the values of the following parameters:
Table 15: z/OS System Tuning
Parameter Value Additional Information
MAXPROCSYS 15000 System will allow at most 15000 processes to be
active concurrently.
MAXPROCUSER 15000 Allow each user (same UID) to have at most 15000
concurrent processes active.
MAXUIDS 200 Allow at most 200 z/OS UNIX users to be active
concurrently.
MAXFILEPROC 65535 Allow at 65535 open files per user.
MAXPTYS 800 Allow up to 800 pseudo-terminal sessions
MAXTHREADTASKS 5000 System will allow at most 5000 threads tasks to be
active concurrently in a single process
MAXTHREADS 10000 System will allow at most 10000 threads to be active
concurrently in a single process.
MAXMMAPAREA 40960 System will allow at most 40960 pages to be used for
memory mapping.
MAXFILESIZE NOLIMIT Unlimited file size.
MAXCORESIZE 4194304
MAXASSIZE 2147483647 This size is same as the region size for TSO. By
default USS ids get some pre-defined minimum
which is usually not enough for WPS kind of stuff. To
avoid problems instantiating java processes this size
should be set to 214783647.
MAXCPUTIME 2147483647 To improve the CPU process time.
MAXSHAREPAGES 32768000 System will allow at most 32768000 pages of shared
storage to be concurrently in use.
Required Fixes
The following fix is required to apply in WebSphere Portal Version 6.1 Solaris environment.
PK73368: Cache synchronization issue, deadlocks can occur in the CacheOnRequest
class. This fix is included in WebSphere Portal 6.1.0.1 and later.