Subject Re: [firebird-support] Firebird 100% CPU Usage After Backup
Author Daniel Rail

At October 29, 2004, 07:45, Graham King wrote:
> After performing a backup of all the databases on our server (Firebird
> 1.51) (either with gbak or using Delphi's components) the firebird
> process jumps to 100% CPU usage, and stays there.

> We had this problem on the release version of Firebrid 1.5 also, but
> not on Firebird v1.

> Our server was running Windows 2000 Pro, we thought this may be the
> problem so we rebuilt it on Windows 2003 Server. Same problem.

> The server contains dual Xeon processors, hyperthreading means the OS
> sees four processors. 2.5GB of RAM.

> We have noticed that this problem ONLY occurs if there are non-local
> connections to any of the databases during the backup, if there are no
> connections, everything is fine.

> Any suggestions as to how we could fix this problem?

Which version of Firebird are you using, Classic server or

If it's Superserver, did you set the CPU affinity setting in

Best regards,
Daniel Rail
Senior System Engineer
ACCRA Group Inc. (
ACCRA Med Software Inc. (