Questions tagged [load-average]

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Check what process is spiking the average load with atop

In trying to find the culprit of a high load average on a system during night (which does not seem to be related to logrotate) I installed atop to write a raw file with a specific interval. While ...
2
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0answers
38 views

What is the relation between IO wait utilisation and load average

Load average uses processes that are running or runnable or in uninterrupted sleep state. So do the processes in uninterrupted sleep state correspond with the %wa as per the top command? Both are ...
2
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0answers
2k views

How to find the cause of High Load Average on Linux

I trying to find the reason why my server is getting as high as 150 in load average, and some time it get up to 200. This is a Ubuntu Server running on a VMware ESXi virtual machine, with 8 CPU and ...
2
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1answer
985 views

Htop load average 30

I'm running an application which, for now, uses the bakery algorithm for syncronizing n processes, but with this method I do a lot of busy waiting on my CPU, in fact as you can see from the title, I ...
2
votes
1answer
712 views

Unusual high load average (due to peak I/O wait? irqs?)

I have a problem with high load average (~2) on my (personal laptop) computer for a long time now. I am running Arch Linux. If I remember correctly, the problem started with a certain kernel update, ...
2
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0answers
384 views

Does high Load average cgroups give “wrong” overall load average

Assume you have a system with 2 processors. Now create a cgroup and configure this group to use only 1 processor. Populate it with enough processes to give it a load average of 5 (to prove a point); ...
1
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0answers
70 views

High CPU load average; how to find the root cause?

It is hard task to find the root cause of CPU load average many commands are used to give partial picture. I am not sure if somewhere we can find a tool that knows how many CPU's we have on machine ...
1
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0answers
40 views

During what kinds of operations is a process considered for the 'load average'?

In general, I'm trying to understand the numbers displayed by uptime (and numerous oder commands): $ uptime 13:40:52 up 18 days, 2:10, 8 users, load average: 0.20, 0.30, 0.64 Here, my system's ...
1
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0answers
72 views

My server load under 40 is healthy?

When I run the following command less /proc/cpuinfo I get list of 40 CPUs, does that mean my system can load go up to 40 and things still be running smoothly?
1
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0answers
347 views

LVM mirror creates high load from time to time, how to lower these effects?

Or: How to throttle down one LVM mirror leg lowering its assumed synchronization cpu load? Is it possible to tweak a LVM mirror configuration so it takes it easy on mirroring files? Whenever there ...
0
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0answers
45 views

How to tune Linux machine in order to improve CPU load average and CPU utilization

We are working with a huge Hadoop cluster. We have 736 datanode machines and each node has 16 cores × 2 threads. On some machines we saw CPU load average (98-128 for 5 min). After deep ...
0
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1answer
362 views

Is it possible to calculate CPU utilization from load average & top CPU% column

I have a file which contains 2 output of uptime load average & CPU% column like an output from top command. So, is it possible to calculate it into CPU utilization or CPU usage at a time? ...
0
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1answer
107 views

Load average for specific time with all programms

I'm searching for a linux tool to make some "performance tests". I have two (or more versions) of programms wihch do the same. To compare versions with each other I want to run these for a specific ...
0
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2answers
269 views

High Load Average:Red Hat Linux: 2.6.32-504.16.2.el6.x86_64: VMware Platform

I virtual machine running red hat Linux and most of the time we see high load average on the machine causing interruption of services. 04:24:08 up 248 days, 11:14, 3 users, load average: 142.04, 79....
0
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1answer
1k views

Why is load average being reported as 0.00 though system is busy doing work?

uptime, top, cat /proc/loadavg all reporting load averages for the last 1/5/15 minutes as 0.00, but the system is definitely busy doing work. Why is this? Server is running Red Hat Enterprise Linux ...
0
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0answers
631 views

File to access for CPU load average on AIX

Is there a file with the load average in it on AIX? I'm looking for something like Linux's /proc/loadavg.