The examples do not give advice ladies.
The main parameters of change in the direction of increasing tariff plan:
kmemsize — 20M
privvmpages — the actual mulberries our memory, I do rate soft:hard 150:200% of the declared site.
numproc — it is desirable to limit, yeah, but not much. to thousands.
Next, have in mind that overselling will not
vmguarpages = privvmpages
oomguarpages = privvmpages
tcpsndbuf, tcprcvbuf — more memory, more buffers
numtcpsock about 500 will be enough
othersockbuf — here in this buffer sitting Unix sockets (mysql)!
numothersock — the same
In General, it is necessary to put and monitor /proc/user_beancounters on the HN to improve. And look for their limits.