R process gets killed spontaneously

Peng Yu wrote:

My R process has been killed for a few times, although the system
administrator did not do so. It happened when R attempted to allocate
a lot of memory. I'm wondering whether R would spontaneously kill
itself if it can not allocate enough memory?

It does not kill itself. If it was not some out-of-memory kill process of
your OS, then you may have seen some segfault. We need reproducible code and
all the details described in the posting guide.