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Parameter descriptions

 

(psid-number)

Identifier of the page set. This is required.

A one-to-one relationship exists between page sets and the VSAM data sets used to store the pages. The identifier consists of a number in the range 00 through 99. It is used to generate a ddname, which references the VSAM LDS data set, in the range CSQP0000 through CSQP0099.

The identifier must not be the same as any other page set identifier currently defined on this queue manager.

BUFFPOOL(integer)

The buffer pool number (in the range zero through 15). This is optional. The default is zero.

If the buffer pool has not already been created by a DEFINE BUFFPOOL command, the buffer pool is created with 1000 buffers.

DSN(data set name)

The name of a catalogued VSAM LDS data set. This is optional. There is no default.

EXPAND

Controls how the queue manager should expand a page set when it becomes nearly full, and further pages are required in a page set.

USER

The secondary extent size that was specified when the page set was defined is used. If no secondary extent size was specified, or it was specified as zero, no dynamic page set expansion can take place.

See the z/OS Concepts and Planning Guide for more information about the EXPAND parameter.

At restart, if a previously used page set has been replaced with a data set that is smaller, it is expanded until it reaches the size of the previously used data set. Only one extent is required to reach this size.

SYSTEM

A secondary extent size that is approximately 10 per cent of the current size of the page set is used. It can be rounded up depending on the characteristics of the DASD.

NONE

No further page set expansion is to take place.

 

Parent topic:

DEFINE PSID

sc11170_

 

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