Load average very high 200-300 , CPU 99% idle, how to check what is causing high load average Ubuntu 14.04.3

[L-M-J]

>From my experience, it was slow disk access fault, % i/o wait was high, have a look to iostat during high average.

Thx



Le 14 novembre 2015 07:51:46 GMT+01:00, mad Engineer <themadengin33r at gmail.com> a écrit :
>I am running Ubuntu 14.04 3.13.0-61-generic kernel on  servers with 40
>cores and 250 Gb RAM.But for some strange reasons load average is
>showing
>unacceptable values of 200-300 but CPU is 99% idle.Even though there is
>no
>impact on application,i like to know why is it showing these values.
>
>*observation:*
>
>*top -d 1*
>
>top - 04:44:41 up 10 days,  2:27,  2 users,  load average: 203.71,
>211.25,
>217.05
>
>Tasks: 1062 total,   1 running, 1061 sleeping,   0 stopped,   0 zombie
>
>%Cpu(s):  0.1 us,  0.2 sy,  0.0 ni, 99.7 id,  0.0 wa,  0.0 hi,  0.0 si,
>0.0 st
>KiB Mem:  26410931+total, 84802192 used, 17930710+free,   204520
>buffers
>
>
>*cat /proc/loadavg*
>
>214.55 213.37 217.71 1/1094 41477
>
>
>*dstat -n*
>
>-net/total-
>
>recv  send
>
>   0     0
>
>267k   10k
>
>217k   27k
>
>289k  254k
>
>
>*mpstat 1 1*
>
>Linux 3.13.0-61-generic (top34.sandiego3.cci.vtt.com
><http://san3r29o011.san3.cci.att.com>)  11/14/2015      _x86_64_       
>(40
>CPU)
>
>
>
>05:01:29 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  
>%steal
>%guest  %gnice   %idle
>
>Average:          all       0.65    0.00       0.80     0.00       
>0.00
>0.00     0.00     0.00        0.00      98.55
>
>
>Any idea why server is behaving strangely??
>
>
>I have tried different forums and IRC rooms none could explain the
>behavior.Can some body please have a look at this.
>
>
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