incredible system load

Steven Law Thu, 16 Jun 2005 19:09:48 -0700

hi,all:

i have a FTP server which runs vsftpd.

normally the system load average is 0.5.

but i found it be incredible high today.

here comes the 'top' information:

===========================================================================

top - 10:06:34 up 1 day, 19:15, 2 users, load average: 31.24, 30.43, 23.65
Tasks: 236 total,   1 running, 235 sleeping,   0 stopped,   0 zombie
Cpu0 : 0.0% us, 1.0% sy, 0.0% ni, 0.0% id, 94.1% wa, 2.0% hi, 2.9% si
Cpu1 : 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu2 : 0.0% us, 2.0% sy, 0.0% ni, 0.0% id, 96.0% wa, 1.0% hi, 1.0% si
Cpu3 : 0.0% us, 0.0% sy, 0.0% ni, 31.7% id, 68.3% wa, 0.0% hi, 0.0% si
Mem:   2075456k total, 2068932k used,     6524k free,     7448k buffers
Swap: 1951888k total,        0k used, 1951888k free, 1962784k cached

PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
3311 root      16   0 2204 1172 844 R 2.0 0.1   0:00.11 top
152 root      15   0     0    0    0 S 1.0 0.0 12:24.65 kswapd0
1780 ftp       15   0 3204 1224 960 D 1.0 0.1   0:00.27 vsftpd
2570 ftp       15   0 3204 1188 936 D 1.0 0.1   0:00.17 vsftpd
    1 root      16   0 1504 512 452 S 0.0 0.0   0:00.46 init
    2 root      RT   0     0    0    0 S 0.0 0.0   0:02.02 migration/0
    3 root      34 19     0    0    0 S 0.0 0.0   0:00.52 ksoftirqd/0
    4 root      RT   0     0    0    0 S 0.0 0.0   0:00.79 migration/1
    5 root      34 19     0    0    0 S 0.0 0.0   0:00.17 ksoftirqd/1
    6 root      RT   0     0    0    0 S 0.0 0.0   0:00.01 migration/2
    7 root      34 19     0    0    0 S 0.0 0.0   0:00.55 ksoftirqd/2
    8 root      RT   0     0    0    0 S 0.0 0.0   0:00.00 migration/3
    9 root      34 19     0    0    0 S 0.0 0.0   0:00.19 ksoftirqd/3
   10 root       5 -10     0    0    0 S 0.0 0.0   0:00.01 events/0
   11 root       5 -10     0    0    0 S 0.0 0.0   0:00.01 events/1
   12 root       5 -10     0    0    0 S 0.0 0.0   0:00.00 events/2
   13 root       5 -10     0    0    0 S 0.0 0.0   0:00.00 events/3
   14 root       5 -10     0    0    0 S 0.0 0.0   0:00.01 khelper
   29 root       5 -10     0    0    0 S 0.0 0.0   0:21.15 kblockd/0
   30 root       5 -10     0    0    0 S 0.0 0.0   0:02.01 kblockd/1
   31 root       5 -10     0    0    0 S 0.0 0.0   0:23.72 kblockd/2
   32 root       5 -10     0    0    0 S 0.0 0.0   0:01.70 kblockd/3
   44 root      15   0     0    0    0 S 0.0 0.0   0:00.12 khubd
153 root       7 -10     0    0    0 S 0.0 0.0   0:00.00 aio/0
154 root       6 -10     0    0    0 S 0.0 0.0   0:00.00 aio/1
155 root       5 -10     0    0    0 S 0.0 0.0   0:00.00 aio/2
156 root       5 -10     0    0    0 S 0.0 0.0   0:00.00 aio/3

... ...

=======================================================================

this is a DELL PE2800 server with 2 Xeon 2.8 CPUs.

kernel is 2.6.10

what's the problem?

any suggest is regarded

incredible system load

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