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Questions tagged [cpu-usage]

The amount of processing units of the CPU used to execute a task and how long it takes.

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High CPU of kworker/3:3+events (due to intel gpu drivers?)

I have a fresh install of ubuntu server 23.04 and I can see that CPU usage on idle is quite high (~0.5) after further investigation I saw that kworker proces periodically (something like every ~20sec kicks in and takes 100% of single core. After…
Bartoszek
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Optimizing CPU and Memory use on Multi-socket NUMA server

I am building a server that will be used by interns in my company to connect to and perform some tasks. The server is running AlmaLinux 9 and using KVM to run Windows 11 guests. The server has 2 CPU sockets, each running 8-core CPU's. After reading…
Fabz
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stress-ng: Simulate specific CPU and Memory Percentage

Goal : For performance test I m using stress-ng and I want to consume 100% CPU of 3 out of 4 Core and 80% of entire memory for 30 min (this is very extreme test condition). And I have few other scenario. I have tried with the command: stress-ng -c 3…
JYOTI PRAKASH MALLICK
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php7.4-fpm consumes 100% CPU and loops mremap() system call

Recently I have upgraded to the mainline Debian 10 backport kernel. This morning I've noticed that the web server is very slow, and inspection showed 100% CPU usage by php7.4-fpm: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+…
mt42
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QEMU load average vs cpu count

When I configure more CPU cores, the load average in my Guest OS as shown by top also increases linearly. I'm trying to understand why this happens, because I expected either the opposite or at least for it to stay the same. As load average should…
Maestro
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How to use top without interactivity?

I want to periodically monitor the CPU usage and plot in time series. Not having much knowledge, I plan to use the top command, something like this question (Monitor cpu usage (and perhaps memory using) for a single process simple as possible).…
user180574
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Slow server performance due to Google Bot and Ahrefs Bot

I have a VPS server with 64 CPU cores and 128 GB RAM running on Debian. I have noticed that Google Bot from IP address 66.249.66.0/24 and Ahrefs Bot from IP addresses 54.36.148.0/24 and 54.36.149.0/24 are causing extreme CPU load up to 100%. This…
Jakub Čuřík
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Why sum of all process CPU(%) is not equal to total cpu(%) utilisation in top output

I have decided to create a simple monitoring tool for my Linux server. For the CPU montoring I relied on top command but I have feq queries on that. In the attached Top Command image of top command output, you can see the idle is 96.8% means CPU…
Bharath S
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MariaDb High Cpu %300

Hi mariadb consumes a lot of cpu. The settings are here. Server features CPU 6 cores/ 12 threads @ 3.4 GHz (4.8 GHz) RAM 32GB DDR4 • ECC Server Grade Disk Drive 2 x 480GB SSD SATA Software RAID [client-server] # # include *.cnf from the config…
Fuat Yavuz
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Setting up slurm with 2 different nodes and 2 different partation on 1 physical server

I have a requirement for setting up slurm on one physical server, with 2 different partation and 2 main node so, need to have, partation1 wihich need to have node1 and need to be used by group1 user partation2 wihich need to have node2 and need to…
biplab
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What does top cpu percentage include?

I have a program that reads data from shared memory and send it to a non-blocking socket in a single-threaded manner. When I'm hammering the traffic into that application, I can only see the TOP cpu percentage about 60% and not going higher, even…
jaeyong
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What is the Max value for speed limit param in CloudLinux (lve)?

I can see in cloudLinux document that in cpu usage limit section, 150% means 1.5 cores : https://docs.cloudlinux.com/limits/#speed-limit My question is : for a server with 12 cores, if I want to use all cores, the correct value should be 1200%…
Kranchi
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Sudden spike in PHP-FPM process CPU usage. How to track down?

I have a magento2 store(with 10609 products) running on an ec2 instance(ubuntu 20.04, 16core and 32GB ram). It is a shared server with staging and live on the same instance. A few days ago, I got an update from amazon saying high cpu usage. when i…
Kingdom venus
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: High CPU Usage By adr_character Command

My linode server is running on UBUNTU 20.4 + nginx. Recently my cpu usage increased up to 100%. At first I thought PM2 caused the problem. Uninstall PM2 but the problem still exists. Even rebooting did not solve the problem When I run this command, …
bapak71
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CPU at 100% during the night, spooler service is causing it

I have a very strange situation where the CPU on our print server runs at 100% for most of the night. During the day it backs down to normal levels. It started when we installed new printers. It is the spooler service that is causing it, at least…
tomviv
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