CATALOG/OPTIMIZE
================

 Rewrites all entries of a catalogue in a new and optimised order.
 By doing this the catalogue itself will also be optimised
 (see also VALIDATE):


  * Speed of accessing single data records
    --------------------------------------

    After having been sorted, access times for single data records may
    cause quite slow screen display of thumbnails.
    Other functions accessing the data records may also be slowed down.
    After execution of OPTIMIZE the records will be written in ascended
    and sorted order to the catalogue files corresponding to the
    selected order of sorting.

  * too much memory used for catalogue files
    --------------------------------------

    Since deletion of data records only means removing entries from
    the index of the catalogue but not from the catalogue file itself,
    the data will still be remaining physically within the files.
    So it may happen that catalogue files use more space on the hard disk
    than is actually needed (see VALIDATE).
    This space will be released after doing an OPIMIZATION.


