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Technical Notes › Regulate the OSF Servers › When Servers Exceed Their Processing Limits

When Servers Exceed Their Processing Limits

This section describes what happens when servers exceed their processing limits. The following parameters limit OSF server transactions:

OSFCPU

Limits the amount of CPU time that a single server transaction can use. When a server exceeds the time limit set by OSFCPU, z/OS initiates the cancellation of the server; therefore, CA OPS/MVS cannot issue a message. The server is terminated with a 322 abend.

The messages OPS2083W and OPS3706W are issued when the OSF execute processor determines that the server terminated without completing the current transaction. The OSF execute processor does not, and cannot, determine why the server was canceled.

OSFOUTLIM

Limits the number of console messages that a transaction running under a server can produce. When a server exceeds the number set by OSFOUTLIM, CA OPS/MVS issues the message OPS3082W. The Explanation and Action sections of this message indicate that the OSFOUTLIM parameter caused cancellation of the server.

OSFRUN

Determines how long (elapsed time) CA OPS/MVS allows a TSO transaction to execute in a server. When a server exceeds the time limit set by OSFRUN, CA OPS/MVS issues the message OPS3709W. The Explanation and Action sections of this message indicate that the OSFRUN parameter caused the cancellation of the server.

OSFWAIT

Sets the maximum time, in seconds, which a transaction can wait for input while in an OSF server. When a server exceeds the time limit set by OSFWAIT, z/OS initiates the cancellation of the server; therefore, CA OPS/MVS cannot issue a message. The server is terminated with a 522 abend.

The messages OPS2083W and OPS3706W are issued when the OSF execute processor determines that the server terminated without completing the current transaction. The OSF execute processor does not, and cannot, determine why the server was canceled.

Note: TLM rules and the system or installation coded IEFUTL exit will receive control for the OSF TSO server address space when a server transaction exceeds its CPU or WAIT time limits.

All of the above information about OSFxxx server parameters applies to the OSFTSLxxx and OSFTSPxxx parameters as well. The USS servers have the equivalents of the OSFRUN and OSFOUTLIM parameters only.

For more information about these parameters, see the Parameter Reference.