MySQL server high load

top - 20:44:11 up 34 days, 4:13, 1 user, load average: 10.13, 7.10, 4.48
Tasks: 49 total, 1 running, 45 sleeping, 3 stopped, 0 zombie
Cpu(s): 8.4% us, 1.1% sy, 0.0% ni, 89.8% id, 0.2% wa, 0.0% hi, 0.4% si
Mem: 2057980k total, 1990012k used, 67968k free, 48148k buffers
Swap: 2031608k total, 160k used, 2031448k free, 787232k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3912 root 15 0 2496 828 668 R 1.8 0.0 0:00.01 top
1 root 16 0 1988 552 472 S 0.0 0.0 0:01.76 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.08 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:00.01 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
6 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0
7 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/1
8 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 khelper
9 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid
26 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/0
27 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/1
37 root 15 0 0 0 0 S 0.0 0.0 0:45.70 pdflush
38 root 15 0 0 0 0 S 0.0 0.0 0:22.42 pdflush
40 root 13 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
41 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 aio/1
28 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd
39 root 15 0 0 0 0 S 0.0 0.0 0:20.26 kswapd0
115 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kseriod
180 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 ata/0
181 root 7 -10 0 0 0 S 0.0 0.0 0:00.00 ata/1
183 root 20 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
184 root 21 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_1
197 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord/0
198 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord/1
206 root 15 0 0 0 0 S 0.0 0.0 5:00.57 kjournald
1086 root 6 -10 2984 460 376 S 0.0 0.0 0:00.01 udevd
1519 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
2064 root 16 0 2380 468 400 S 0.0 0.0 0:03.45 irqbalance
2130 root 16 0 5004 1012 844 S 0.0 0.0 0:00.09 rpc.idmapd
3419 root 15 0 472m 469m 256 S 0.0 23.4 0:02.95 minilogd
3453 root 18 0 3332 408 352 S 0.0 0.0 0:00.00 mingetty
3483 root 19 0 2052 404 352 S 0.0 0.0 0:00.00 mingetty
3485 root 19 0 2084 408 352 S 0.0 0.0 0:00.00 mingetty
3486 root 18 0 1516 408 352 S 0.0 0.0 0:00.00 mingetty
3532 root 21 0 1940 408 352 S 0.0 0.0 0:00.00 mingetty
3899 root 16 0 5792 1644 1360 S 0.0 0.1 0:09.03 sshd
3935 root 16 0 6216 1208 1048 S 0.0 0.1 0:00.01 mysqld_safe
3958 mysql 15 0 524m 356m 3688 S 0.0 17.8 25:14.13 mysqld