======Database Issues======

VPOP3 version 3 and later use the [[http://www.postgresql.org|PostgreSQL]]] database server. This is an open source enterprise level database server. Several VPOP3 problems are due to problems with the database service.

  * [[Database & Disk Caching]]
  * [[Software conflicting with database]]
  * [[VPOP3DB/PostgreSQL service not starting|VPOP3DB Service not starting]]
  * [[Database Size]]

=====Database corruption=====
If VPOP3 won't start even though the process is running, then that is often because the PostgreSQL service is not running. If the PostgreSQL service won't start, or keeps crashing, then it is probably because the database is corrupted. In VPOP3 versions 3 and 4, the PostgreSQL service is usually called 'Postgres-VPOP3'. In version 5 and later, the service is called 'VPOP3DB'

  * [[Restore a database backup|Restoring a database]]
  * [[PostgreSQL server won't start due to damaged log files]] or missing pg_control file
  * [[Total Rebuild of Database]]
  * [[Repairing corrupted database]]

Our chargeable support service will be able to help with this if necessary. Note that we cannot guarantee recovering data, as that will depend on how badly the database has been damaged, and when the latest good backup was.