RHD:FAQ

mlockall error

If you get an error like:

mlockall: Cannot allocate memory

It is most likely due to a limit in the amount of memory a user may lock (protect against swap)

see the limits bu

$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 8180
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
...

here the limit is 32k, this is too small

Change try to set to a higher value, or unlimited:

$ulimit -l unlimited

This is probably not allowed, so change in /etc/security/limits.conf

add a line, e.g.:

@users soft memlock unlimited

This sets the limit for all in users group to unlimited