Questions tagged [load-average]
The load-average tag has no usage guidance.
44
questions
3
votes
1answer
51 views
Reproduce load average calculation
I am digging into calculation of LA. So, what have I found:
LA calculates as exponential moving average every five seconds:
LA(t) = LA(t-1) + EXP_R * (n(t) - LA(t-1))
where
LA(t-1) - is the LA ...
-4
votes
5answers
230 views
What is the Unix command-line command to get the system load information?
In Linux or Unix operating system, I am getting the text
System load
as below.
Can anyone please tell me what is the meaning for that and how to extract system load % using CLI commands?
...
2
votes
2answers
61 views
How to calculate n values in a column and the overall average?
I would really appreciate some help with this as I am relativity new to Linux. I'm using grep but I also want an average of all of my extracted values (irrespective of which column they are in) and ...
2
votes
0answers
96 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 ...
1
vote
2answers
124 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 ...
0
votes
2answers
663 views
uptime + cpu load average [closed]
we have the follwing CPU details
more lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 32
On-line CPU(s) list: 0-...
1
vote
2answers
799 views
linux top load average seems too high
Following this https://unix.stackexchange.com/a/279354/108702, I ran;
lscpu | grep -E '^Thread|^Core|^Socket|^CPU\('
CPU(s): 8
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): ...
0
votes
1answer
359 views
how much maximum load average can be achieved with 8 processors each with 4 cores
I have been trying to understand what is the maximum load average I can go in Ubuntu.
when I run,
cat /proc/cpuinfo
It produces this,
processor : 0
vendor_id : GenuineIntel
cpu family : 6
...
2
votes
0answers
5k 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 ...
1
vote
0answers
54 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 ...
0
votes
1answer
624 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?
...
2
votes
1answer
1k 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 ...
17
votes
1answer
3k views
How does a CPU know there is IO pending?
I have been looking into the iowait property shown in top utility output as shown below.
top - 07:30:58 up 3:37, 1 user, load average: 0.00, 0.01, 0.05
Tasks: 86 total, 1 running, 85 ...
2
votes
1answer
1k 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, ...
1
vote
0answers
73 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?
3
votes
2answers
1k views
CPU and Load Average Conflict on EC2 server
I am having touble understanding what server resource is causing lag in my Java game server. In the last patch of my game server, I updated my EC2 lamp server from apache2.2, php5.3, mysql5.5 to ...
3
votes
1answer
2k views
How is load average calculated on FreeBSD?
On Linux, the load average is the average number of processes that are either runnable or waiting averaged over the past 1, 5 and 15 minutes.
On OpenBSD (and possibly other BSDs, but neither the ...
0
votes
1answer
65 views
Will the load average of my Linux box increase if it reaches file descriptors or TCP connections limit?
Will the load average of my Linux box increase if it reaches file descriptors or TCP connections limit ?
2
votes
4answers
8k views
Get per-core CPU load in shell script
I need to report the CPU load per core as a percentage from a shell script, but I cannot run e.g. mpstat for one second. Basically I think that the infos top is showing after pressing 1 is what I want,...
0
votes
1answer
192 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 ...
1
vote
0answers
458 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 ...
13
votes
3answers
19k views
How is the “load average” interpreted in “top” output? Is it the same for all distributions?
I would like to know if the output of a Red-Hat based linux could be differently interpreted by a Debian based linux.
To make the question even more specific, what I am after, is understanding how ...
6
votes
2answers
11k views
High load average: Which processes are waiting in the queue?
I have an Ubuntu server running Redis, which suffers from a high load problem.
Forensics
Uptime
# uptime
05:43:53 up 19 min, 1 user, load average: 2.96, 2.07, 1.52
sar
# sar -q
05:24:00 AM ...
0
votes
1answer
112 views
What is the threshold for top to label a process as idle
With the top command I can toggle, whether to list idle processes or not. What is the CPU usage limit for a process to show up as idle or non-idle?
1
vote
1answer
380 views
Disk I/O and load average peaks once every hour
We have updated our server from Debian Wheezy to Jessie and from php5.6 to php7.0, but now we have a disk I/O and load average peak exactly every hour. The exact time depends on the system start time.
...
1
vote
1answer
4k views
What could be the cause for going to uniterruptable deep sleep state for this particular make process?
I am trying to understand 'D' state correctly.
In my case, the following process went to 'D' state:
make -f freac/CMakeFiles/freac_objs.dir/build.make freac/CMakeFiles/freac_objs.dir/build
It is ...
2
votes
2answers
686 views
How to limit the load average
Question :
How can I limit the load average so it does not excess a certain number? I am on a debian 4.7 (wheezy).
Context :
I rented a vps some time ago (4 cores) so I can run some computations, ...
-2
votes
2answers
5k views
High Load Average, how to fix it? [closed]
I need to fix my virtual server. What's wrong with it? Needs memory? or else?
4 core with 4GB memory
top - 10:06:13 up 53 min, 1 user, load average: 31.74, 30.17, 24.79
Tasks: 180 total, 1 ...
0
votes
1answer
63 views
How to get smaller resolution of load average (<1 minute)
I'm trying to build a service that blocks other requests if the server overloaded. But the load average of 1 minute is not good enough for this, the logic is something like this:
if load_average > ...
1
vote
2answers
486 views
System Load averages
As a disclaimer, I have read related question to this topic, but still a bit confused in regards to the situation I am seeing.
Understanding system load
and also:
Understanding top and load average
...
2
votes
0answers
421 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); ...
0
votes
2answers
287 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....
1
vote
1answer
773 views
High CPU load on the embedded Linux of my router
I hope that, as long as this question refers to Linux, could be answered here:
I have a DSL router from Observa Telecom, model BHS-RTA :
Modem Name : BHS_RTA
Serial Number : D861940E5088
Time and ...
1
vote
1answer
23 views
Is there a way to get a top of something that happened at a particular time
Is there a way for someone to take a look at system activity, like load averages and system processes that happened at an earlier time of the day? I mean is there a command for that? Say for example, ...
2
votes
2answers
710 views
Why is the range of load average not 0-1+ for all cpu's together?
I know that load average is 0-1(or 0-1024) per cpu. E.g a busy quad-core can have a load average of 4.0 or higher. (e.g if there are many tasks). I understand it can be huge like 100+ etc.
I also ...
0
votes
1answer
2k 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
votes
1answer
437 views
Questions about CPU usage [closed]
How bad/normal/good is this CPU usage?
Cpu0 : 14.4%us, 6.3%sy, 0.0%ni, 78.8%id, 0.0%wa, 0.0%hi, 0.5%si, 0.0%st
Cpu1 : 88.3%us, 8.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 3.7%si, 0.0%st
...
0
votes
0answers
690 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.
2
votes
0answers
55 views
Top show high CPU on process but idle on load average [duplicate]
I am running FreePBX on DigitalOcean VM. I am facing some call dropping issue in Asterisk. When looking at "htop", "top" and FreePBX GUI, I see different results of CPU utilization and can't ...
2
votes
1answer
104 views
Openvz resource management
I have a couple of nodes ( which are not mine ) running one openvz kernel version -2.6.32-042stab092.2
specifications :
processor model name : E5-2620 0 @ 2.00GHz
Number of Processors : 24
RAM : 48G
...
2
votes
1answer
264 views
kvm_open: cannot open /proc
I have 100+ boxes running FreeBSD 8.4 amd64 RELEASE (p9) with the same configuration.
And only one of them sometimes behaves strangely: load average (generally 4~6, it's ok course box have 8 CPU ...
2
votes
1answer
1k views
Is an LXC guest load average the same as the host's load average?
If I run top on the guest, the load average values seem to be exactly the same as running top on the host.
Is a Docker (LXC) guest's load average the same as the host's load average?
14
votes
4answers
22k views
Why/how does “uptime” show CPU load >1?
I have a 1 core CPU installed on my PC. Sometimes, uptime shows load >1. How is this possible and what does this mean?
EDIT: The values go up to 2.4
3
votes
3answers
2k views
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 ...
