"/sbin/yast: fork: Cannot allocate memory" on openSUSE 10.1

How do I get the above message right after starting an ssh session. The reason I opened the ssh session was that I came across a 500 internal server error on the plesk panel. I tried to look around for similar problems, but all answers I find seem very specific toward variations on this problem. I guess it is a very generic message, if I should provide more info, please let me know what to run. free -m total used free shared buffers cached Mem: 5020 202 4817 0 0 0 -/+ buffers/cache: 202 4817 Swap: 0 0 0 ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited pending signals (-i) 16375 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 16375 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited cat /proc/user_beancounters Version: 2.5 uid resource held maxheld barrier limit failcnt 1231234: kmemsize 6061008 6064704 17024866 19647330 0 lockedpages 0 0 3800 4096 0 privvmpages 138119 138227 138256 202568 755228 shmpages 60296 60296 131072 131072 0 dummy 0 0 2147483647 2147483647 0 numproc 64 64 232 232 0 physpages 30682 30671 0 2147483647 0 vmguarpages 0 0 66400 2147483647 0 oomguarpages 50128 50117 2147483647 2147483647 0 numtcpsock 28 28 500 500 0 numflock 14 14 200 232 0 numpty 1 1 64 64 0 numsiginfo 0 0 512 512 0 tcpsndbuf 275520 275520 4683256 6102456 0 tcprcvbuf 458752 458752 4683256 6102456 0 othersockbuf 48576 49280 1503232 4063232 0 dgramrcvbuf 0 0 240000 262144 0 numothersock 38 38 382 382 1 dcachesize 773048 774892 2194304 2317184 0 numfile 2874 2874 5432 5432 6308 dummy 0 0 0 0 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 numiptent 64 64 128 128 0