Неожиданно выросла нагрузка на сервер

top - 16:10:16 up 4:28, 1 user, load average: 4.83, 5.70, 6.66
Tasks: 131 total, 3 running, 125 sleeping, 0 stopped, 3 zombie
Cpu(s): 85.7%us, 13.3%sy, 0.0%ni, 0.3%id, 0.3%wa, 0.0%hi, 0.3%si, 0.0%st
Mem: 4045812k total, 2154824k used, 1890988k free, 96128k buffers
Swap: 6094840k total, 0k used, 6094840k free, 920576k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2726 mysql 15 0 371m 90m 5144 S 45.2 2.3 75:28.49 mysqld
26249 apache 16 0 372m 58m 4488 R 39.6 1.5 5:06.74 httpd
26009 apache 16 0 373m 58m 4448 S 26.9 1.5 4:04.48 httpd
22366 apache 15 0 373m 58m 4500 S 23.6 1.5 5:29.33 httpd
25270 apache 16 0 373m 58m 4188 R 23.6 1.5 4:22.41 httpd
8823 aumr 16 0 191m 17m 6120 S 22.9 0.5 0:01.19 php
8843 aumr 16 0 186m 13m 5576 S 9.3 0.4 0:00.28 php
8849 aumr 15 0 189m 16m 5500 S 5.7 0.4 0:00.17 php
2850 nginx 15 0 69660 5512 984 S 0.3 0.1 0:48.19 nginx
1 root 18 0 10320 704 592 S 0.0 0.0 0:00.46 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
8 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/0