Hi

I am getting a system load of 90 and i have a lot of free ram swap i not used at all and cpu is high about 90% but i am sure that the problem is from a background system command that can't be found using top

Using top all are normal and i have very low numbers as always....

I am not also under attack for sure as i don't have many connections on the server...

Is there anyway to check with more details what is causing this system load?

Maybe an application task is running or maybe a task crash?

After restarting the server is fine now but just to know for the next time...

Thanks

if top is telling you that nothing is using the cores in the CPU

this is a SERVER ? right ?
so gnome is NOT installed

read/ write bottleneck ? maybe

what dose "iotop" say

( might not be installed )

There are not many places where CPU usage is unaccounted. Is 90% CPU a normal usage for you ?. Or do you normally run less than this and it increases as loadavg increases (note these are not the same thing) ?.

Does this high loadavg affect your ability to service user requests ?. Why do you reboot ?.

Without hard data not much we can do to help.

Yes

I don't think there is a problem with I/O but i will run next time the iotop and i will post here.

No as i always get maximum 40% usage daily.

From 2 seconds my page loads at 5 seconds.

I was thinking that something is running on the system that is not visible on top or something crash or maybe i got a loop on something and restart solve my problem 100% for today at least...

Next time you have the problem, run the following, and post the output here

is this a VPS or bare-metal server?
If it was a VPS it could be influenced by other VMs on the same host or over-committing system ressources.

Dedicated:

CPU: Intel Xeon E5-1650v2 6c/12t 3,5 GHz+/3,9 GHz+
RAM: 128 GB DDR3 ECC 1600MHz
Disks: 3 x 160 GB SSD Intel DC S3500 SATA3 6 Gbps SoftRAID 5
Public network card: 1x 1 Gbps

Only one forum inside using Nginx phpfpm mariadb memcache zendopcache

Have you checked system processor usage with top?
Are you running some kind of JVM, e.g. tomcat?
How did the resource usage increase, from one minute to the next or slowly over a few days/weeks?
Just asking since I've seen something similar recently.

No i do not have tomcat o anything else related....

I have the problem exactly at 16:45 but yesterday was a small spike of 20% more load than normal for 2 minutes so i am waiting to get more load so i can run a few commands to check it....

I have experienced similar issues. my system uses two xeon quad core E5450 processors and I have isolated issue to video drivers or card hardware.
In my case all 8 cores spike to above 90% capacity and wireless will show far above normal transmit volume vs rx volume, ie tx buffers are very high.

I can change video attributes and get temp relief! Thermal issues are suspect.

Good luck!!!!

Henry
Semper Fidelis
Sir/Mam

Just another idea:
if you get another high load situation, check the amount of open files and file opening rate.
I've recently seen some problem in this area with an "unmatured" peace of software where the kernel had to open files on a very high rate but never clodsed them again, which caused system ressources being eaten by the kernel until the machine froze.

Ok thanks i will check it