What are the causes of a corrupted database?

webx.db is the Web Crossing Database file. This file is nearly always being updated. Interrupting Web Crossing without a proper graceful shutdown can corrupt the database.

For example, but not limited to:

• Power Failure.
  
• Hardware problems...most typically flakey disk drives, sometimes bad memory modules..same as with any software.
  
• Forcing Web Crossing to shut down improperly (kill -9 rather than make-quit).
  
• Web Crossing dies due to other system process(es) crashing and taking WebX with them.
  
• A reboot without prior proper WebX shutdown (assuming your system doesn't try to shut webx down normally by default).
  
• Multiple instances of WebX attempting to access the same database.
  
• Insufficient available sytem memory or disk space or heavy virtual memory "thrashing".
  
• Extremely low cache settings for a large and/or very active database ("Memory Usage").
  
• Restoring webx.db directly from a system backup and not via Web Crossing generated backup files (webxdb.NN and webxroll.NN).
  

See also "Back Up and Recovery".