MySql crashes - PHP using most RAM

A Cpanel account consumes most RAM via PHP
top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13420 user 20 0 113m 25m 6624 S 0.0 2.5 0:00.44 php
13692 user 20 0 113m 25m 6632 S 23.1 2.5 0:00.51 php
13413 user 20 0 113m 25m 6628 S 0.0 2.5 0:00.36 php
13416 user 20 0 113m 25m 6628 S 0.0 2.5 0:00.39 php
13514 20 0 113m 25m 6628 S 0.0 2.5 0:00.40 php
13516 20 0 113m 25m 6628 S 0.0 2.5 0:00.31 php
13656 20 0 113m 25m 6632 S 8.0 2.5 0:00.46 php
13677 20 0 113m 25m 6632 S 10.7 2.5 0:00.41 php
13407 20 0 113m 25m 6628 S 0.0 2.5 0:00.32 php
13411 20 0 113m 25m 6628 S 0.0 2.5 0:00.34 php
13415 20 0 113m 25m 6628 S 0.0 2.5 0:00.40 php
13498 20 0 113m 25m 6628 S 0.0 2.5 0:00.29 php
13666 20 0 113m 25m 6632 S 4.8 2.5 0:00.36 php
13404 20 0 113m 25m 6628 S 0.0 2.5 0:00.31 php
13409 20 0 113m 25m 6628 S 0.0 2.5 0:00.33 php
13669 20 0 111m 25m 6380 S 10.2 2.5 0:00.53 php
13701 20 0 109m 22m 5976 S 26.3 2.2 0:00.49 php
13710 20 0 109m 22m 5960 S 18.8 2.2 0:00.35 php
13691 20 0 108m 22m 6308 R 22.0 2.2 0:00.52 php

free -m
total used free shared buffers cached
Mem: 1024 1001 22 0 0 5

Database seems to crash everytime I try to start it

Please help....