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Communicate with the UTIL Subtask

You can communicate with the UTIL Subtask by modifying the library caching using the EMPTY, DELETE, COMPRESS, or SETCACHE subcommands with the UTIL subtask.

To empty, delete, compress, or set cache

  1. Use the EMPTY subcommand to empty the library cache of all members as shown in the following command:
    MODIFY sysview,MODIFY UTIL,LIBCACHE EMPTY
    
  2. Use the DELETE subcommand to delete a member from library cache as shown in the following command:
    MODIFY sysview,MODIFY UTIL,LIBCACHE DELETE type *|member
    
    type

    Library type

    member

    Member name

    *

    Delete all members

  3. Use the COMPRESS subcommand to compress the library cache member as shown in the following command:
    MODIFY sysview,MODIFY UTIL,LIBCACHE COMPRESS type interval
    
    type

    Library type or ALL

    Note: Specifying ALL will compress all of the library types.

    interval

    Time interval specified as hh:mm:ss

    *

    Uses the default interval

    Default: 00:30:00

    Minimum: 00:00:01

    Maximum: 48:00:00

    Any member that has not been accessed within the specified time interval will be removed from the cache.

  4. Use the SETCACHE subcommand to set the caching option by library type as shown in the following command:
    MODIFY sysview,MODIFY UTIL,LIBCACHE SETCACHE type YES|NO
    
    type

    Library type

    action

    NO - Do not cache members

    YES - Do cache members

    If the caching option is set to NO and members already exist in the cache, the members will not be retrieved from the cache.