Ubuntu 10.04 – high load , low cpu, IO, and no swapping

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Ubuntu 10.04 – high load , low cpu, IO, and no swapping – Managing your servers can streamline the performance of your team by allowing them to complete complex tasks faster. Plus, it can enable them to detect problems early on before they get out of hand and compromise your business. As a result, the risk of experiencing operational setbacks is drastically lower.

But the only way to make the most of your server management is to perform it correctly. And to help you do so, this article will share nine tips on improving your server management and fix some problem about linux, ubuntu, performance, , .

Ubuntu 10.04 64bit – Kernel 2.6.36
Running as a Xen 3.4 guest.

8GB memory , no swap being used, no IO wait time, and 0% cpu.
Yet high load. Why is this:

15:11:24 up 5 days,  3:22,  2 users,  load average: 21.23, 20.06, 19.51
Tasks: 113 total,   1 running, 112 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   7416372k total,  5250472k used,  2165900k free,   153260k buffers
Swap:  1959924k total,    26288k used,  1933636k free,   246932k cached

IO top shows nothing.

free -mem

        total       used       free     shared    buffers     cached
Mem:          7242       5127       2115          0        149        241
-/+ buffers/cache:       4736       2506
Swap:         1913         25       1888

Solution :

You either 1) own the host or 2) you are renting it from a hosting company.

If it’s 1 then you should look at the other machines on the host, find out which one is thrashing the disks and fix it.

If it’s 2 you need to complain to your hosting company and see if they can’t either move you or move the offending party to another physical box and/or data store.

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