Compressing a Database

Data that is deleted from a database is not actually deleted, but only marked for deletion. The same applies to data that is modified. The "old" data is not removed, but marked. This means that both deletions and modifications increase the size of the database. We therefore recommend to compress the files on a regular basis, for example once a month to remove the marked data.

To compress a database:

1. Close the database. This can be done by right-clicking on its name in the Vulcan Explorer application and selecting Close from the displayed context menu.
2. Right-click on the name and select the Compress and Rebuild option.

Note

• You cannot compress and rebuild library design databases.
  
• You cannot compress and rebuild a symbols database while Vulcan is running.
• The compression/rebuild procedure makes a copy of the database and compresses the copy. Once compressed, the copy will replace the original database. For this reason you should ensure that the amount of free disk space is greater than the size of the database to be compressed.