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DB2 Manager User Guide 39
StorageTek Proprietary
and may improve retrieval response times.
If this parameter is omitted, a default value of MAXDRDR=4
will be used.
TAPECNTL: MAXTWTR
MAXTWTR = nnn
Requirement: Optional
Default: 4
Validation: nnn = 1-3 digit numeric value in range 1 - 255
Use: The MAXTWTR parameter specifies the number of active
tape-writer subtasks which are to created in the DB2 Manager
control region.
Notes: Each execution of the DB2 Manager table migration utility will
acquire a single tape-writer subtask. The value of the
MAXTWTR controls the maximum number of row migration
jobs which may execute concurrently.
This setting may be varied during DB2 Manager operation via
the 'SET MAXTWTR’ operator command.
If this parameter is omitted, a default value of MAXTWTR=4
will be used.
TAPECNTL: MAXSCHED
MAXSCHED = nnn
Requirement: Optional
Default: 4
Validation: nnn = 1-3 digit numeric value in range 1 - 255
Use: The MAXSCHED parameter specifies the number of active
scheduler subtasks which are to created in the DB2 Manager
control region.
Notes: A scheduler subtask is responsible for receiving requests from
the SQL intercept module, validating them and passing valid
requests to the appropriate component within the DB2
Manager control region for further processing.
Increasing the number of scheduler tasks will reduce the
average length of time that it takes to assign a row storage or
retrieval request to the appropriate subtask. However, each