SET SYSTEM

---

Use SET SYSTEM to dynamically change certain system parameter values that were initially set by CSQ6SYSP.

Synonym: None

>>-SET SYSTEM--+-DEFAULT-------------+-------------------------->
               '-| parameter block |-'
 
   .-CMDSCOPE(' ')------------.
>--+--------------------------+--------------------------------><
   |                     (1)  |
   +-CMDSCOPE(qmgr-name)------+
   |             (1)          |
   '-CMDSCOPE(*)--------------'
 
Parameter Block
 
|--+--------------------+--+-------------------+---------------->
   '-CTHREAD--(integer)-'  '-IDBACK--(integer)-'
 
>--+-------------------+--+--------------------+---------------->
   '-IDFORE--(integer)-'  '-LOGLOAD--(integer)-'
 
>--+----------------------+--+--------------------+------------->
   '-SERVICE--(character)-'  '-STATIME--(integer)-'
 
>--+--------------------+---------------------------------------|
   '-TRACTBL--(integer)-'
 
 

Notes:

1. Valid only on full function WebSphere MQ for z/OS when the queue manager is a member of a queue-sharing group.

 

Parameter descriptions

CMDSCOPE

This parameter applies to z/OS only and specifies how the command is executed when the queue manager is a member of a queue-sharing group.

' '

The command is executed on the queue manager on which it was entered. This is the default value.

qmgr-name

The command is executed on the queue manager you specify, providing the queue manager is active within the queue-sharing group.

You can specify a queue manager name, other than the queue manager on which it was entered, only if you are using a queue-sharing group environment and if the command server is enabled.

*

The command is executed on the local queue manager and is also passed to every active queue manager in the queue-sharing group. The effect of this is the same as entering the command on every queue manager in the queue-sharing group.

DEFAULT

Resets the parameters to the values specified in the archive system parameters set by CSQ6SYSP.

 

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.

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

Specifies the 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.

Note:

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

 

Usage notes

1. The new values take immediate effect, with the possible exception of STATIME and TRACTBL.

   Changes to STATIME take effect when the current interval expires, unless the new interval is less than the unexpired portion of the current interval, in which case statistics are gathered immediately and the new interval then takes effect.

   For TRACTBL, if there is any trace currently in effect, the existing trace table continues to be used, and its size is unchanged. A new global trace table is only obtained for a new START TRACE command. If a new trace table is created with insufficient storage, the old trace table continues to be used, and the message CSQW153E is displayed.

2. If CTHREAD is reduced, any currently active threads can still connect to the WebSphere MQ system. If CTHREAD is increased, waiting threads are connected, up to the point where the number of active threads equals CTHREAD.

 

WebSphere is a trademark of the IBM Corporation in the United States, other countries, or both.

 

IBM is a trademark of the IBM Corporation in the United States, other countries, or both.