apache crash on vps

Hi I have 2 VPS systems which webserver crashes after about two weeks.
I remember reading similar events with other users.

in the log I see:
Oct 17 04:02:02 remigius syslogd 1.4.1: restart.
Oct 17 04:02:13 remigius logrotate: ALERT exited abnormally with [1]

After but not always immediately the Apache will crash and 1 apache process will hang.
After I kill the 1 process, Apache will boot again.
Both VPS's run in PV

Do you have any ideas why this is happening?
Thank you



Not off the top of my head, sorry ..

Is the system perhaps low on RAM?

You might have to ask some xen-specific experts about this. I haven't seen this kind of error myself .. or heard anyone else report it.