[firebird-support] Potential Causes for Query to Slow Down

[craig_...@coxcolvin.com [firebird-support]]

I have a Delphi Application that uses FireDac to communicate with Firebird 2.5. 
 I have a query that periodically slows down fro about 5 secs to many minutes.  
If I backup and restore the database, I get my original performance back.

What kind of things could cause this behavior.

Thanks in advance.