Concepts › CA IDMS/DB Reorg's Record Allocation Techniques › Minimize Record Overflow

Minimize Record Overflow

CA IDMS/DB Reorg overflows a record only when its target page is full. Records that will not fit on their target pages are not stored on another target page until CA IDMS/DB Reorg has finished allocating all other records to their assigned target pages. This method of postponing record overflow prevents a record that does not fit on its target page from displacing other records allocated to the following target pages. Once all records have been allocated to their target pages, CA IDMS/DB Reorg then allocates the records that were held back by searching for a page with enough free space that is as close (sequentially) as possible following the record's target page.