MongoDB: out of memory

Question

I am wondering about the MongoDB memory consumption. I have read the corresponding manual sections and the other questions on the topic, but I think this situation is differ

Answer 1

ulimit -a solved the mystery:

core file size (blocks, -c) 1
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 30619
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) 3338968
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 30619
virtual memory (kbytes, -v) 6496960
file locks (-x) unlimited

It worked after setting max memory size and virtual memory to unlimited and restarting everything. BTW, the next file had again 2GB.

Sorry for bothering you, but I was desperate. Maybe this helps somebody "googling" with a similar problem.