At 10:33 PM 28/11/2008, you wrote:

>Hello,
>
>We had some very stable industrial Win 32 applications running FB
>2.0.3 running for a long while.
>
>Initial quick tests revealed a marked increase of performance if
>upgrading to 2.1 so we started an upgrade process.
>
>Now, we have an issue with Win XP 32 computers / superserver
>installation as service (guardian enabled): after the upgrade
>everything "works" but is slow like a crawl.
>
>Wether we use our software or popular tools like EMS or HK software
>(without any ODBC etc), the server quickly degenerates into taking
>>90% of the CPU. Everything still works but it's totally unusably
>slow.
>
>Even exiting the applications, the server stays at > 90% CPU till
>shut down and restarted (we use CPL applet for that).
>
>We also tried backupping and restoring the databases, both with the
>above software backup tools and by using gbak, but it won't fix the
>issue.
>
>I can provide full details and even a database example if needed.

1. Try changing the GCPolicy(in firebird.conf) to background
2. Don't run a MON$ transaction in high load conditions

./heLen