I'm useing Firebird in conjunction with IBX (I know one should not do that but it's a legacy application I need to maintain...). When running that application (an apache shared module) under heavy load I occasionaly get an exception message "blob not found" - and that although the query was executed a hundered times before without any problems.
When googling for that problem I found that forced write should be enabled (which actually is the case) but nothing else....
The query by the way is rather simple. Just a "select * from" with a left out join attached. The problem occurs when reading a Blob (subtype text).....