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Parameter block

 

For a full description of these parameters, see the WebSphere MQ for z/OS System Setup Guide.

Parameter block is any one or more of the following parameters that you want to change:

CTHREAD

Specifies the maximum number of connections from batch, CICS, IMS™, TSO, and the channel initiator to a single instance of WebSphere MQ.

Specify a number in the range 1 through 32 767 but be aware that the channel initiator makes a number of connections to the queue manager that must be allowed for when setting the CTHREAD system parameter. The number of connections is up to eight plus the combined value of the queue manager parameters CHIADAPS and CHIDISPS.

IDBACK

Specifies the maximum number of background batch and TSO connections to a single instance of WebSphere MQ.

Specify a number in the range 1 through 32 767.

IDFORE

Specifies the maximum number of TSO foreground connections to WebSphere MQ.

Specify a number in the range zero through 32 767.

LOGLOAD

Specifies the number of log records that WebSphere MQ writes between the start of one checkpoint and the next. WebSphere MQ starts a new checkpoint after the number of records that you specify has been written.

Specify a value in the range 200 through 16 000 000.

SERVICE

This parameter is reserved for use by IBM.

STATIME

Interval, in minutes, between consecutive gatherings of statistics.

Specify a number in the range zero through 1440.

If you specify a value of zero, both statistics data and accounting data is collected at the SMF data collection broadcast.

TRACTBL

Specifies the default size, in 4 KB blocks, of trace table where the global trace facility stores WebSphere MQ trace records.

Specify a value in the range 1 through 999.

Storage for the trace table is allocated in the ECSA. Therefore, select this value with care.

 

Parent topic:

Parameter descriptions

sc13070_

 

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