Hi,
Thanks for your email
>
> Do you have enough RAM + swap space to support that large a heap, along with
> the other memory requirements of the Tomcat process and all other processes
> on the system? If not, you may well be getting hit by the Linux OOM-killer,
> which leaves few traces.
Yes we do, we have 6GB total memory
>
> > However Tomcat fails quite often, no trace information can be
> > found in logs, neither my app logs nor tomcat logs.
>
> What about a core file, or a JVM crash file?
>
No core files neither jvm crash files :(
Best regards