Was there ever an answer discovered for this question? Its a problem that has been annoying me for well over a year now. It appears that process accounting or something like that kills processes when they use more than x cpu minutes.
For instance I bzip2 some web log files. After a big day of traffic, the weblogs cannot be compressed as the bzip2 process gets killed after it runs for a while.
I have asked support about this before but they said there is no such mechanism in place. This is false, there is definately something that kills my processes and history tends to indicate its when bzip2 is trying to compress a larger than usual log. Meaning its probably CPU related.