Are you two network cards in server?
Are you using events?
In this situation the firebird will hang...

--- In ib-support@y..., "Robbi" <esser.r@g...> wrote:
> Thanks for your first hints,
>
> I have to add to Michaels description that this must be an internal
activity
> of interbase because this massive cpu usage lasts even if all client
> connections are finished. We have to stop and restart the ibserver
process
> under linux.
>
> Robbi