Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [cpu-usage]

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

685 questions
0
votes
1 answer

How to check what triggered high CPU usage on past days, on Digital Ocean?

I want to investigate what caused a high cpu usage for several hours on 1/16. Digital Ocean graph shows a prolonged high cpu usage in the course of about 12 hours. Is there a log somewhere that I can tap into that would reveal to me more detail…
user5248
  • 103
  • 2
0
votes
1 answer

How to calculate CPU utilization for an application in a multicore system

On 8-core server, 0-3 are configured as isolcpus and remaining cores (4-7) are available for system and user processes to run. My application has multiple processes which will run on any one of the mentioned non-isolcpu cores (4-7). I need to find…
surya
  • 101
0
votes
1 answer

Lots of suspicious GET requests that overload my CPU

I have a DigitalOcean droplet that hosts a small website with pretty much no traffic. Yesterday, I received an alert that my CPU was over 95%. Normally it runs between 1% to 5%. In the "bandwidth" chart on my DigitalOcean dashboard, the outbound…
fraxool
  • 99
  • 2
0
votes
1 answer

High cpu temperature and temperature difference

On a cluster I am working on there is a node which is showing high CPU temperature. The node has 2 Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz. The sensors command from lm-sensors is showing that one CPU is at around 70°C and the other at 90°C. The…
Thomas
  • 113
  • 4
0
votes
0 answers

Multiple core overload on Ubuntu

I have a really strange behavior of the server. I run Apache, MySQL, WordPress on it. And recently, it has had a lot of freezes. MySQL/Apache shows high CPU usage (out of 24 cores - 2400% cpu% according to the htop). At first, I thought that the…
a b
  • 101
  • 1
  • 3
0
votes
2 answers

High CPU usage by Apache/MySQL

I have a problem with CPU usage on the website that uses WordPress, Apache, and MySQL. During the day, from time to time, CPU usage by MySQL and Apache goes up to 2400% (I have 24 cores in total), the server freezes, the average load goes up to…
a b
  • 101
  • 1
  • 3
0
votes
0 answers

Cloud setup for occasional high to extreme CPU-intensive tasks (instant vertical scaling?)

I have a business workload that has very low CPU-usage most of the time, and occasionally needs to burst to very high CPU-usage. It currently runs on a dedicated server with 32 cores, but was hoping to transition to a cloud hosting solution. The…
Albeit
  • 161
  • 1
  • 1
  • 2
0
votes
1 answer

Benchmark script performance against CPU/RAM consumption for different parameters

I have an image processing shell script that can be provided with different sets of parameters that all produce a valid output for me. I'm trying to identity the set of parameters that has the lowest resources (CPU/RAM) usage as this script is going…
user728899
  • 3
  • 2
0
votes
1 answer

EC2: Relatively small network out spikes cause 100% CPU usage

Background Hello, I have a server I'm running on a free EC2 instance. I'm using nginx and passenger/rails as my web server and application server. The server receives little traffic (still in development), but a reasonable amount of traffic from…
jacob_g
  • 123
  • 7
0
votes
1 answer

sbin: root@policykit -1/9 high CPU

The process "sbin: root@policykit -1/9" takes high CPU in our Ubuntu 18.04.4 LTS server. Can anyone help to find what it is? Thank You.screenshot
Support
  • 1
  • 1
0
votes
1 answer

Hyper-v VM high CPU usage in Windows Server by task manager?

Windows 2012 std host with Hyper-V. Hyper-V guest VM is Windows server 2019 std Both the host and the VM are setup as separate SQL & IIS application platforms with some light add-on tools such as FTP server, and backup agent. Today, without any…
best
  • 301
  • 2
  • 4
  • 11
0
votes
1 answer

Why atop shows high CPU but sum of individual processes %CPU far smaller?

How can the sum of processes' CPU-% usage be lower than the total CPU load, according to atop and top, please? I have a CPU reaching very high load (87%, for several hours) even though the sum of the individual processes as shown by atop is muchs…
jucor
  • 3
  • 3
0
votes
0 answers

High average load + low cpu usage + low disk usage + normal network usage + normal memory usage = ok or not?

I see high CPU average load several times a day on my server. For example, 21:20 and 22:45 on the following figure: However, my CPU, disk, and network are all OK: Disk Network CPU Memory Also do not see strange forks Interrupts…
ch271828n
  • 143
  • 5
0
votes
1 answer

Increased CPU interrupts, degraded performance on upgrade to Symfony flex

We're upgrading our Symfony 3.4 app (LAMP w/ opcache/php-fpm) to flex (as per https://symfony.com/doc/current/setup/flex.html). In load testing, we're seeing increased CPU usage, particularly system CPU. Changes we've noticed in…
Matt
  • 1
  • 2
0
votes
0 answers

Amazon EC2 instance unexpectedly using CPU and network (not http). How to analyse?

I would like to try and better understand how to analyse the following situation (which is no longer occurring) CPU pinned at 50% all night (100% of 1 core I suppose) according to Cloudwatch. Network usage all night: almost completely flat at…
Tom
  • 101
1 2 3
…
45 46