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Linux System Load Average | Understand Load Average from command output | Tech Arkit
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- čas přidán 22. 04. 2020
- Linux System Load Average | Understand Load Average from command output | Tech Arkit
Load average figures giving the number of jobs in the run queue (state R) or waiting for disk I/O (state D) averaged over 1, 5, and 15 minutes.
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thank you so much , it was really helpful to me
Thank you
Crisp and clear explanation great job bro 😎
thank you.
Well explained
Great video. Will i use the same command at 10.30 fg you used to kill? Can you please explain bit more about fg command in context of this video.D I need to type fg 1 to cancel?
Its a background running program inorder to bring to forground you have to run fg JOBNO and kill other wise you can also use ps command to find out its PID and kill it.
Hi Sir, Thank you and one question I observed that some times the cpu usage is low and the load average is high why and how it happens???
You have to compare your server CPU cores, then use mpstat -P ALL 1; observer for few seconds. in another putty session run top command and observe you will understand.
nice explanation sir thanks.
Most welcome
thank you bro, good job
Glad it helped
HI Sir,
Could you please make a video on the troubleshoots done by the Linux admin for frequent basic issues.
Okay.
Yes Sir it would be great help if you could please create videos on Linux troubleshooting
what command allows you to show only the last 15 minutes of the load average? and not the 1 minute and 5 minute
Simple grep and cut the last portion from uptime command
Great topic..
Can you share shutdown / reboot process?
Okay.
32 bit os load average is differ from 64bit ??
device maps to which LVM if there are too many dm-* devices in the system. How to find the mapping relationship between them?
Please make vedio on this topic it's urgent
Check pvs, vgs and lvs command out so that you will understand device mapping
Thnx arkit
Very well explained. (y)
Thanks
Hi sir , do you have a shell script for network load balancing on several servers I want a script not a tool
No, i did not wrote any for this scenario.
I have one question i have 24 processors with 6 cores each and a load avg of 24, 23, 20... Can you explain this please? If everything' s ok or having issue ? What role does processor have here in load avg?
Check cat /proc/cpuinfo for more details.
if your load average = TotalCores. if Load average more than the cores it should be concerning.
@@TechArkit bro /proc/cpuinfo will give processors and cores per socket, how to identify total no. of cores
Hi sir, if I have 1cpu then what will be the ideal load average value
1 is idle load average
Thank you
You're welcome
Great content,
Thank you.
How to reduce atd process cpu utilisation
Very clear bro...but, How do we fix if load avg is high in real time?
its quite tricky and its based on the situation. because we can't kill the processes which are CRITICAL for business.
what is normal laod average for 8 core cpu?
in simple terms 8 is normal, if it goes behind 8 its a CRITICAL.
in my system I had needed to install sysstat package to be able to run mpstat
Yes that's correct you need to install systat package in order to run mpstat.
👍👍
(y)
Hello Arkit need help about shell script " How to read automatic password using shell script "
Can you elaborate the question what exactly your looking for.
sir coupd you please share your twitter handle so we could ask doubt there easily.
@@biharlearning9294 @aravikumar48
so single process can use only single core... Single thread vs multhreaded application..
why that process not used other cores...
cpu time vs cpu seconds...
single process can access multiple cores its based on the application intelligence.
@@TechArkit single threaded applications like php,nginx , redis,. They only use one core for processes.. (I don't how it works)..
But MySQL is a multhreaded ..
uptime*
how to calculate 5 nad 15 min load please explain
Its not straight forward calculation.
@@TechArkit so only we can calculate 1 min load average
Hi sir,
Is it possible to split any running process from 1 core to available 4 cores?
Not possible
@@TechArkit thanks for your response, what will happen if I run
#taskset -cp 0,1,2,3
@@ebinthomas4199 That's set the PID to CPU affinity. Yes it will change CPU cores as well.
How can I get load avg history for last 24 hrs.
sar command . sar -A -f /var/log/sa/sar_file_dated
@@TechArkit thank you sir
If one minute giving avg then what is the use of 5min and 15 min avg..could u please answer it
@Pawan Soni Tq
I have seen many time CPU is 50 - 60 %idle and still load high, could you please explain these scenario. There was no High memory, no High disk utilizaion, no process in D state.
Also would like to inform, load average in not CPU load average, its SYSTEM load average.
Check your CPU Cores and Load Average and compare with CPU performance; mpstart -P ALL 1 command output.
@@TechArkit the CPU core is one and idle percent is 60%.
Load average is around 2
@@rajkori1716 how many cores you have. check using mpstat -P ALL 1; you will understand.
@@TechArkit I have one core, pressing 1 on top command tells that, I have seen everything, iostat, mpstat, sar everything all seem to be normal and again one core and 60% idle. Leave it I do not think you would be able to answer. Also FYI Load average is not CPU load average, it's SYSTEM Load average. Performance tunning / troubleshooting is not easy task.
how to know the number of cores from the below?
load average: 6.81, 9.03, 5.56
How can I reduce the load?
check the /proc/cpuinfo then you will understand. your looking other way
Ur drawing is much better than ur English ;)
Thank you