> I am running a site using Windows 2008 32-bit server and Firebird Database Version 2.5.1.
>
> We have a mix of client connections utilizing direct access to the database service as well as simultaneous Oracle ODBC sessions. There are 9 separate database files for each of the connecting agencies.
>
> We are occasionally seeing the FBSERVER.EXE process spike to 50% constant CPU usage, and no clients (or us using EMS SQL Manager Lite 2010 for Interbase/Firebird) can connect to any of the databases.
>
> The client connections just hang – once the Server process is stopped, they all timeout/error out, and we start the service back up, and everyone can get back in just fine.
>
> I have checked to make sure no AntiVirus or Backup Software is scanning the Firebird Service folder or the directories hosting our database files.
>
> Does anyone have any suggestions on what could be causing this?

A wild guess is that fbserver.exe (SuperServer) is busy doing something
(costly report/processing, long-running query, sweep etc.) and by nature
can only utilize max. one CPU/core per database. During that time,
others are stuck or even can't connect. I have seen this many times in
various support cases now with SuperServer.

Switching to Classic (SuperClassic) and some fine-tuning usually helped
a lot, especially on a SMP server.


--
With regards,
Thomas Steinmaurer
http://www.upscene.com/