> 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.

SS or CS ?

> 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.

Show us a "gstat -h" output when server is busy.

Regards,
Vlad