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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Windows Server 2008 High CPU Use; Shutdown fixes it, but restart doesn't? [closed]

The issue I am having is with Windows Server 2008 (physical machine). We have a couple of low-impact client apps on the server, MySQL for our in-house system written in ASP.NET, Vipre Antivirus (which ...
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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
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Why one of the cores is running full on (100%) during development?

I'm developing an app (Python) which uses face recognition and OpenCV libraries. I can see even after the app finished processing one of the cores keeps running full on for another 10 mins or so. ...
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Intel(R) Xeon(R) CPU E3-1230 V2 @ 3.30GHz maxing out at 1.6Ghz

I'm having a problem in one of our servers where it seems the CPU never reaches more then 1600Mhz and I can't fingure out why. I even ran multiple stress tests at once (Mprime + Stress) and the CPU is ...
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Proof CPU maximum frequency in VM

CPU-Z on some customers VM for DB server is constantly showing 2,8 GHz CPU frequency. While with TurboBoost enabled it could be 3,6 GHz by the Intel documentation. VM administrator is telling me, that ...
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Assigning CPU and MEM usage variables in PBS/TORQUE

I asked this question at meta.stackoverflow.com; they said it was the wrong forum I am using the FALCON assembler (for genomes by PacBio; https://github.com/PacificBiosciences/pb-assembly) and it's ...
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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 ...
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Laravel/PHP process on debian 10 only ever using one of two CPU threads

I am running a Debian 10 Buster server on a google VM with PHP 7.3 Apache2 and MySQL 8. On the server, I am running Laravel 8 as an API for two clients. I recently upgraded the VM to an n2-standard-2 (...
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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 ...
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High CPU Usage on Digital Ocean Web Server

We have a Laravel website which is currently hosted on Digital Ocean (Nginx). The droplet is a 2 vCPUs, 2 GB Memory, 60 GB SSD, 3 TB transfer running PHP 7.4. We are seeing a steady increase in CPU ...
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PHP-FPM using 100% CPU on a server that has 16 threads

I have a server that has 32 GB of RAM and 16 threads. This server has an API in PHP that receives many requests from other external APIs, I made a configuration in PHP-FPM to support all these ...
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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 ...
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rhel + how to disable CPU's on my machine

We have physical Linux machine with 16 cpus lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 16 We want to disable ...
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Samba and luks encrypted disk together: Huge performance loss despite plenty of CPU resources, LUKS and samba alone works as expected

Setup: SSD encrypted with luks aes-xts 512 bits (256 bits AES key), ext4 filesystem dd write performance of 138 MB/s, CPU usage 97-100 % dd if=/dev/zero of=testfile status=progress bs=32M count=128 ...
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Windows Server 2016 VM running on Hyper-V Server 2019 Free Edition - Maximize CPU Performance

I'm running a Windows Server 2016 RDS only OS (no DC, no AD, etc) as a VM on top of Hyper-V Server 2019 Free Edition. I'm attempting to maximize the CPU performance for my 2016 VM, as it's the only VM ...
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mosquitto server taking 97-100% cpu . and cant connect to it

I amusing mosquitto as a mqtt server. Its a live server. From last one day I am not able to connect to it and on checking the cpu usage by top i see that its giving full load to cpu PID USER PR ...
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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 ...
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Get CPU load percentage on Windows 2008r2 Server - WMIC doesn't work?

I found the command wmic cpu get LoadPercentage was recommended as a way to get a CPU load estimate from a command line. It works as expected from a Windows 10 system: c:\>wmic cpu get ...
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100% CPU and RAM used in ubuntu server [duplicate]

I am using ubuntu to deploy a laravel project. 2 days ago my server crashed and I could not access it even via ssh. I restarted the server from AWS dashboard, but it crashed again after some time. So ...
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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. ...
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CPU Utilisation Compue API

I have been using openstack apis and have following issue: API used: /servers/{server_id}/diagnostics API version: v2.1 Problem: Couldn't get utilization value of my server it is showing null even i ...
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gradual linear increase in CPU usage by DNS.exe

We have a domain controller running on a Server 2016 physical server and we have noticed that over time, DNS.exe gradually consumes more and more CPU, to the point where the server becomes ...
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KVM with 1 vCPU has CPU load above 1

I have a KVM running with 1 vCPU on a machine with 4 cores. lscpu in the KVM gives me 1 CPU with 1 core : Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte ...
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High cpu consuming process on postgres in a container

I have a flask app and a PostgreSQL DB in a docker container on my ubuntu server. I found a high CPU consuming process, which increases CPU usage to 100%! I tried finding the process origin by ...
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High usage IRQ/CPU on Centos 8 router BGP

PRC | sys 0.34s | user 0.10s | | #proc 124 | #trun 2 | #tslpi 93 | | #tslpu 0 | #zombie 0 | clones 0 | | #exit 0 | CPU | sys ...
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My Google Cloud Compute Engine Wordpress based website keeps askiing for more cpus and more memory - GBs of it

I have a website that has had about the same traffic all year, yet on the GC Compute Engine page it keeps asking for more and more resources. Right now it has n1-highmem-16 (16 vCPUs, 104 GB memory) ...
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141 views

Web server CPU Utilization slowly increasing with LAMP stack?

I made a ton of changes to my website this year and noticed that my CPU Utilization has been gradually increasing for a couple of months (it slowly went from around 0% to 60% in about 2 months). After ...
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Windows 10 VM pegs CPU at 100%

We have a Windows 10 VM with one vCPU and 8 gigs of RAM. It runs an HVAC design software that various users can RDP in and use. We've noticed that sometimes, the CPU will (seemingly randomly) max at ...
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How do I pin point which processes consuming the CPU from resource monitor?

I need help on pin pointing which processes actually utilizing the most CPU on my server. I had a Win2008 server which are hosting several applications. From time to time the CPU will spike to 100%, ...
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Why does svchost.exe gradually consume more and more CPU on a Server 2016 Domain Controller?

We have a physical server that is running Windows Server 2016 and is acting as a domain controller. We are monitoring several services/parameters on this server via Nagios/Check MK and are noticing ...
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157 views

Dovecot LMTP high CPU

It had a problem with Dovecot, where it consumed 100% of the CPU, in the log it showed the error "(Out of memory (service lmtp {vsz_limit = 512 MB}, you may need to increase it)" So we ...
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Pattern in load average but CPU utilisation is random

I have one board running Linux. This is what uname -a returned: root@f1 ~# uname -a Linux f1 4.9.207+g817118864a58 #1 SMP PREEMPT Thu Oct 1 06:40:49 UTC 2020 armv7l armv7l armv7l GNU/Linu I have been ...
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Loading resources from 1 location for multiple sites (more or less resource intensive)?

Let's say I have 3 sites that access the same resources. The same images, JS/CSS files. If I make a "CDN" for these resources on the same server (different addon domain + Cloudflare), will ...
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CPU utilization

I have an issue with CPU utilization on a Kubernetes VM Instance. My average CPU Utilization was around 19%. On september 15th 2020, based on Google recommendation, I updated my kubernetes version (...
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1answer
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Tightvnc Server using only 1 core?

I have a server setup with 8 cores and 32gb of RAM. I am using it to launch as many java applications as I can and hope to make the most efficient use of my resources. Upon launching I notice the ...
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1answer
68 views

Uneven processor usage on a Multi core Postgre SQL server

We have a dedicated server running Postgres 12 database with this configuration: Model: HPE ProLiant DL580 Gen9 CPUs: 4*Intel(R) Xeon(R) CPU E7-4850 v3 @ 2.20GHz Ram: 128 GB Ubuntu 18.04.4 LTS ...
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How to load one physical CPU in a system with virtual cores?

I have an AMD processor with 4 physical cores and SMT enabled. Because of the latter, I see 8 virtual cores in a Linux box. For example, stress command can spawn a number of workers spinning on sqrt()....
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153 views

How to interpret CPU utilisation on KVM guest / host

I have a host Ubuntu 18.04 64-bit os running on a 24-core Xeon system. I've allocated 2 vCPUs to the guest which is Ubuntu 18.04 32-bit, and it's running an application which normally requires a small ...
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692 views

ZFS: arc_prune is using 100% CPU with high load average

I have a 4 disk storage server with two ZFS raidz1 pools, and suddenly last night it started running at 100% CPU with an high load average: root@stg1:~# w 07:05:48 up 296 days, 17:19, 1 user, load ...
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Confusion with cpu states in /proc/stat

I wrote a program (monitoring plugin) that reads the cpu usage numbers from /proc/stat. Unfortunately it seems the numbers do not match the manual page proc(5), especially I get different proportions ...
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How to find out the mySQL query which uses most of the CPU using performance_sc

52893 TID is using 100% CPU in my server How to find the query corresponds to that TID? For me, this table is empty
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CPU usage doubled

I just upgrade a kubernetes cluster. Since then, CPU usage of the node when all my servers are sleeping moved from around 20% to 45%. I upgraded from : N1-custom-2-3840 with cos and gke 1.13 To : E2-...
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323 views

sar and top show high cpu usage, but vmstat and ps show low cpu usage. Why?

I'm diagnosing a high CPU usage event, and I found a weird difference between numbers from ps/vmstat, which show almost 0%, and sar/top, which show almost 100% (user + system): sar 1 5 Linux 2.6.9-67....
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Is it possible to have user time > wall time? [closed]

I have obtained the following results from executing a script: real 0m1.027s user 0m1.752s I understand that: Real time is the wall time. This is the time I would have obtained if I have measured ...
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CPU load for high performance computing

Is there a reasonable/safe level of CPU load in the context of high performance computing? I understand the meaning of load average for servers in general, but do not know what to expect for servers ...
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1answer
28 views

SpectreV1 Mitigation Performance profiling

I am trying to measure the system performance when spectreV1 mitigation is on. I am using stress-ng for that. So far I have tested the system with various stressors like cpu, qsort, str, matrix, ...
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logrotate -> gzip 100% CPU usage after boot

I have Ubuntu 20.04. After booting or returning from suspention my CPU goes into 100% usage thanks to (root) gzip process. After I checked dependencies with: ps fax | grep -B5 gzip It turned out that ...
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653 views

Hyper-V: VMs are not using all CPU power available to the server? [closed]

I have a relatively powerful dual-xeon (12 cores) server running MS Windows Server 2016 with Hyper-V installed. I created a bunch of VMs - and none of them are really resource-demanding - except one ...
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2answers
112 views

Is there a linux tool that will print Load Average and CPU percent idle every x seconds?

I cannot seem to find a tool that prints LOAD AVERAGE and CPU PERCENT IDLE every X seconds in a terminal window. I am looking for something along the lines of vmstat but with those two values that top ...
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I need to run multiple processes at once, which server should I use [duplicate]

I bough droplet on DigitalOcean 1GB and 1CPU. I'm running cronjob there. Currently I'm able to run 30 background tasks(processes) at once, once I go up server cannot handle that much. Those ...

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