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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.

685 questions
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MySQL process goes over 100% of CPU usage

I'm experiencing some problems with my LAMP server. Recently everything became very slow, even though visitor count on my websites didn't change to much. When I run top command, it says that MySQL process has taken over 150-200% of CPU. How's that…
Temnovit
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How to monitor CPU usage and performance on a Hyper-V server with several VM's

I have a server that is running Windows 2008 64 bit Hyper-V, with 8 gigs of RAM and Intel Xeon X3440 @ 2.53 Ghz, which gives me 8 logical cores in the performance monitor on the host system. I have set up three Virtual Machines, all running Windows…
Bjørn
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stress-ng: Simulate specific cpu percentages

Linux environment: Debian, Ubuntu, Centos Goal: Test monitoring program that set alarms and trigger different alarms at different cpu percentages. ex: (30-50%), (51-70%) and >90% So I need a cpu stresser that can simulate specific cpu percentage per…
AJN
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ps aux hanging on high cpu/IO with java processes

I'm having some issues with java process and nrpe checks. We have some processes that sometimes use 1000% cpu on a 32 core system. The system is pretty responsive until you do a ps aux or try to do anything in the /proc/pid#…
Mike
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IIS App Pool High CPU usage despite no requests

I have recently migrated a set of Windows Server 2008 R2 / IIS 7.5 servers to new servers running Windows Server 2012 / IIS 8. I am experiencing some odd behavior from IIS. We have 2 identical servers, each server is running 2 web sites, each on…
Leland Richardson
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Why is 1 of my 24 CPUs Pegged at 100%?

I have an HP ProLiant DL380 G7 system using 2 6-core CPUs, with Hyper-threading enabled, for a total of 24 logical CPUs (as seen by Windows). When running our application, total system CPU utilization is good, but one of the 24 CUPs is pegged at…
Patrick Cuff
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Is there a way to calculate the percentage CPU utilization by reading /proc/stat at once?

I guess the question is, could I somehow calculate the CPU utilization percentage just by reading the /proc/stat once? # head -1 /proc/stat cpu 67891300 39035 6949171 2849641614 118251644 365498 2341854 0 I am thinking about summarizing the…
Istvan
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What creates CPU I/O wait but no disk operations?

I have CPU I/O wait steady around 50%, but when I run iostat 1 it shows little to no disk activity. What causes wait without iops? NOTE: There no NFS or FUSE filesystems here, but it is using Xen virtualization.
Jason Cohen
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Why is idle windows VM using so much CPU?

I have 2 VMs running as guests on a KVM virtualization platform running on Ubuntu 10.04. One VM is an Ubuntu 10.04 system, the other is a Windows 7 system. When both machines are completely logged out, the Linux machine uses 1% CPU, the Windows…
user13328
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How can a Perfmon "% Processor Time" counter be over 100%?

The counter, Process(sqlservr)\% Processor Time, is hovering around 300% on one of my database servers. This counter reflects the percent of total time SQL Server spent running on CPU (user mode + privilege mode). The book, Sql Server 2008…
Bill Paetzke
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TrustedInstaller.exe takes a lot of CPU

Does anyone know how to fix issue with TrustedInstaller.exe when it takes a lot of CPU? Operating system: Windows 2008 x64 Windows' Modules Installer service is set to Manual.
GrZeCh
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Why is my router CPU at 40% when no processes use more than 2%?

I have a problem, I have a Cisco 1841 running Cisco IOS 15, and I get strange behavior. The CPU usage is shown as 40%, but there is no processes that is using this much CPU power. Here is an example: lev1841#show processes cpu sorted CPU…
Kedare
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How to investigate the cause of a 100% CPU event that lasted for hours?

Yesterday the CPU on my Xen-based VPS server went to 100% for two hours and then went back to normal, seemingly naturally. I have checked logs including syslog, auth.log and more and nothing seems out of the ordinary. During this time, the server…
thomasrutter
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CPU% more than 100 in ps -aux

We use ps -aux to find out when tomcat process takes high CPU utilization, if that so we will send a alert to Group. But some times %CPU shows more than 100, but our application working fine. Is it bad sign or whether our understanding is correct…
Selvakumar P
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How to check gpu usages on aws ec2 gpu instance?

I'm running a ubuntu gpu instance on AWS ec2. I'm not sure if my application is using gpu accelerations. So how to check gpu usages on aws gpu instance?
aplrh
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