For optimal performance, the server can tune the following server options automatically:
To have the server automatically tune the MOVEBATCHSIZE and MOVESIZETHRESH options, set the SELFTUNETXNSIZE option to Yes. When the server performs an internal data movement operation, such as migration, reclamation, move data, storage pool backup or restore, it will adjust these values to achieve optimal performance. To prevent running out of log space during these operations, use the DEFINE SPACETRIGGER command to allow for expansion of the recovery log.
To have the server automatically tune the BUFPOOLSIZE option, set the SELFTUNEBUFPOOLSIZE option to Yes. Before expiration processing, the server resets the database buffer pool and examines the database buffer pool cache hit ratio. The server accounts for the amount of available storage and adjusts the buffer pool size as needed.