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On a shared web server I have a strange readings in /proc/loadavg:

# cat /proc/loadavg
2145237816.60 2145245358.02 2145270263.79 10/1409 410568

The load is in fact normal and server is very responsive. It is a 8 core 16GB server.

# uname -a
Linux XXXX 2.6.18-338.19.1.el5.lve0.8.36 #1 SMP Wed Jul 27 13:20:06 EEST 2011 x86_64 x86_64 x86_64 GNU/Linux
# vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 5  0 383520 533624 837152 10716692    0    1   280   240    0    0 24 14 55  7  0

Part of top output is bellow:

top - 12:10:22 up 83 days, 12:32,  2 users,  load average: 2145210247.30, 2145219511.25, 2145245934.60
Tasks: 1257 total,   2 running, 1249 sleeping,   3 stopped,   3 zombie
Cpu(s): 16.1%us,  7.1%sy,  0.0%ni, 76.5%id,  0.2%wa,  0.0%hi,  0.2%si,  0.0%st
Mem:  16403852k total, 15910568k used,   493284k free,   853720k buffers
Swap: 33543712k total,   383520k used, 33160192k free, 10780112k cached

Any suggestions really welcomed.

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That seems like a lot. Have you checked for processes in uninterruptible sleep mode? (ps aux and look under "STAT" for processes with a D) –  Frands Hansen Aug 18 '12 at 10:16
    
Nope. No uninterruptible sleep processes: `#ps -aux | tail -n +1 | awk '{ print $8}' |sort | uniq -c | sort -g Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ 1 R+ 1 S<s 1 STAT 2 R 2 SNs 2 S<sl 2 TN 2 TNs 3 Ssl 6 S+ 6 Sl 6 Ss+ 14 SN 30 Ss 251 S 911 S<' –  blueCat Aug 18 '12 at 11:22
    
This is Cloud Linux kernel for Centos 5, you could report it there, as well what hardware are you using. –  Andrew Smith Aug 18 '12 at 16:17
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1 Answer 1

It was a known CloudLinux kernel bug. After updating the kernel and rebooting, everything went back to normal.

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