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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CPU/ memory utilization

WE have a job running very slowly. And I required to produce the analysis of CPU/ memory utilization during that backup.Also need statustics around the database performance for that batch job. How to ...
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What does %st mean in top?

Here is an example from my top: Cpu(s): 6.0%us, 3.0%sy, 0.0%ni, 78.7%id, 0.0%wa, 0.0%hi, 0.3%si, 12.0%st I am trying to figure out the significance of the %st field. I read that it means steal ...
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svchost.exe runs at 90% CPU, tasklist /svc shows RpcSs is the culprit

I'm running Windows Server 2003 Standard (Much to my distaste), I've applied all the security updates and now I'm stuck with a box that's constantly being hammered by svchost. The process ID is ...
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What should I look for when monitoring an Amazon EC2 Micro Instance's CPU usage?

I'm using Monit to keep an eye on my Amazon EC2 Micro instances, but I'm a little confused about the Load Average CPU metrics because of the Micro instances' ability to use up to 2ECU for short times. ...
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SNMP.exe on a physical server with Windows Server 2003 consistently takes 20% of CPU utilization

snmp.exe takes 20% cpu utilization, irrespective of any other processes running/stopped on the server. The machine has HP hardware (oops, not IBM) When we stop the snmp service, the CPU utilization ...
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Apache CPU usage stays at 100% even when there are no requests

I've been running the Apache HTTP server benchmarking tool (ab) on my new Apache server to test performance. I noticed that with a command like the following: ab -n 100000 -c 1000 http://www.mysite....
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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 ...
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What's going on with my server? High load, lots of idle CPU time, low disk utilization

I run a web site and send a legitimate opt-in, daily email newsletter to subscribers. Both the web hosting and email sending are done by the same machine. I have about 100,000 subscribers who have ...
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Analyzing CPU usage across multiple servers

I am having some load issues with one of my servers, it's running Xen with various guests and with the current 7 it's at its limit. However it tends to lag every now and then and we'd like to figure ...
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How can i diagnose IIS pushing the CPU to 100% usage?

I have a web server with more than a few ASP.NET sites running on it. Every so often, i notice that IIS is pushing the server's CPU to 100%. The sites share application pools, per .NET version they ...
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Windows Server load climbs to 100% -- possibly due to php?

For our setup here, we have 2 load-balanced Windows 2003 Servers with PHP using FastCGI & IIS6 that host a multitude of websites -- probably 30 websites or so. The largest website gets about 5000 ...
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Does cpu consume power differently while executing instructions and while being idle?

Why does a CPU consume different quantities of power at 2Ghz when it is executing an instruction it is not executing any instruction Should'nt the CPU be consuming same power irrespective of ...
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How does a power graph of a server running a job look like when there is no CPU power management mechanism deployed

Suppose there is no CPU power management mechanism deployed in a server, and i run a job on it and monitoring the power drawn by the server by using a wall power meter, what kind of a profile do you ...
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Bugzilla random lag and CPU usage

Here is the configuration : Bugzilla (3.4.2) application running on a Ubuntu server 8.04 with Perl 5.8.8. Here is the problem : Sometimes (randomly), pages take very long to load. It can be any of ...
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Ubuntu Linux, interpretation of top command result

I am a newbie to Linux OS and I had trouble on my drupal based sites which had turned out to be really slow. I am using 2 separate servers for hosting and MYSQL. On preforming the top command, I got ...
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Monitor and graph CPU usage per process and per thread

I need to monitor CPU usage by a given process and each of its threads. For each of them I want to have: average and maximum CPU usage percent, total CPU time used during the captured period, a graph ...
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% CPU Utilization

From where does the System Monitor calculate its % utilization values? I need to get those values at a particular instant, to do some rudimentary load balancing.
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4 votes
3 answers
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Massive CPU usage spike, How do I find out what causes it?

I have a server running CentOS Linux, and very rarely (maybe once every 3 months) something happens that causes it to have an exceptionally high CPU load (400%) that causes the server to basically ...
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Massive CPU usage spike, How do I find out what causes it?

I have a server running CentOS Linux, and very rarely (maybe once every 3 months) something happens that causes it to have an exceptionally high CPU load (400%) that causes the server to basically ...
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OS X Server 10.4 postfix qmngr is suddenly using tons of resources

I have an Apple XServe G5, running 10.4 server, that I use primarily for my (small) companies website and internal email. Usually, the processor usage hovers around 5-10% total. As I have a rather ...
Chris's user avatar
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Idle server with load ~1.4

I've started a server from Scalr's AMIs. Top shows me ~1.4 constantly. I expect it to be 0 as in all the previous servers I worked with. The server runs mysql 5.1 on ubuntu-10-04 Below you can find ...
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Apache going straight to 100% mem usage on localhost

I'm running XAMPP on a OS X testing server... I'm the only person sending requests to the server. I've never messed with Apache config before, so I'm kinda without a paddle here. When I start Apache, ...
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Regarding CPU Utilization in Solaris

I would like to know how to find out the following for a Solaris box: Number of occurrences of CPU Utilization at 100% Duration of time CPU stayed at 100% Is there any variant of sar command to ...
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Limiting maximum cpu time for user-launched programs

We have a cluster running CentOS with Sun Grid Engine for research simulations. However, some users who aren't too familiar with the system end up running jobs on the head node, which of of course ...
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Server is too busy

We have an advertisement sever which handles loads of requests at a time, however sometimes out of the blues it shows 'Server is too busy' and an 'iisreset' has to be executed in order for the server ...
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1 answer
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Server running at 100% without explanation

I have a Ubuntu VPS that has recently begun to be non-responsive through full processor utilisation. Unfortunately, I'm at a loss as to what is causing this and I was looking for some pointers that I ...
Josiah's user avatar
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Artificially burden the CPU

I'm looking for a command line application that will artificially burden the CPU. It needs to be better than just a busy loop. We're testing how the system holds up under heat stress and the CPU ...
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Increasing PHP CPU Efficiency

I'm running a WAMP (2003, 2.2, 5.1, 5.3) stack and am seeing high CPU load when running a third party, open-sourced application. Are there any tools to increase CPU use efficiency for PHP or profile ...
Omer van Kloeten's user avatar
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Huge host CPU usage in idle vmware guest. Ubuntu 10.04 host, Vista SP2 guest

I'm experiencing huge host CPU usage with an idle vmware guest. Host: Ubuntu 10.04 32-bit 2.6.32-24-generic-pae. (Very new install, i.e 24 hours ago) Hardware is Dell XPS M1530 laptop, 4GB ram. ...
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On a freeBSD box - CPU idle from TOP is 0% but no process taking up cpu

On a freeBSD box, when I do TOP after starting a process x: CPU states: 34.4% user, 0.0% nice, 64.8% system, 0.8% interrupt, 0.0% idle Here, 0% idle. But the highest cpu using process is x ...
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3 answers
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windows server 2008 100% CPU

I am on Service Pack 2. My CPU is running at 100% with either svchost.exe or services.exe. I know that this was common in XP, server 2000, etc. But now I only seem to find posts for Vista. What is ...
user49352's user avatar
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What's causing CPU utilization 100% during night time

I have a windows 2008 running virtual, and once in a while it says the CPU utilization reaches 100% during night, In the morning I only know that CPU utilization reached 100% but what not the reason ...
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CPU load on CentOS Plesk server between 50-100% but processes only add up to around 10%

I've got a CentOS based Plesk VPS which keeps on slowing to a crawl. I checked what was happening with top, and found my load averages seem to be frequently spiking to very high numbers. After ...
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4 answers
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limit cpu ocupation for script

How can I limit a cpu usage to my backup script. It does a mysql db dump and backup of my www directory then bzip2 everything, but it takes a bit and during this time a cpu has 100% load. Can I ...
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CPU spiking in Win2003 server with High NDM activity

We have a Win2003 server, where we receive files through NDM and at any time, we would be receiving 6 files from different sources. The CPU on this server is always > 95%, which causes all the ...
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1 answer
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Does Windows performance degrade past a certain level of CPU utilization?

Is there a recommended average CPU threshold in running Windows boxes based on experience in other shops? Background: We are running with Windows Server 2003 32-bit OS. Servers are handling a major ...
Mike Taylor's user avatar
3 votes
3 answers
3k views

taskmgr.exe 100% CPU Usage

I have 2 IBM servers Intel Xeon Dual core with > 2gb RAM. the problem is that Taskmanager uses one full core when i open it. The same happens when i copy files in the explorer. (source: bghupdate....
Burnsys's user avatar
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Having problems with high CPU usage and apparent memory leak of Exim

I'm having problems with my server and am hoping you can help. The culprit appears to be exim. The CPU usage is consistently high and the memory usage trends up and up and up for no apparent reason (...
Dancrumb's user avatar
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13 votes
5 answers
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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 ...
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4 votes
1 answer
2k views

Linux Cumulative User, System CPU Usage of Running Process?

On Linux (and other Unix-like OS's if there's a general answer), is there an easy way to get an output similar to the time command (current real time, user, and system CPU usage totals) for a process ...
dsimcha's user avatar
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12 votes
2 answers
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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 + ...
Bill Paetzke's user avatar
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How to monitor process hogging CPU on a remote server

I have a remotely hosted (virtual, VMware) dedicated server (Windows 2008 Server Web edition w/ SP1) that I can only connect to over Remote Desktop. Lately, a process hogs CPU for ~40 minutes most ...
sergeb's user avatar
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How can I restart yum?

on my server, yum is using a LOT of system resources. My friend suggested to kill -9 it, but I want to know I'll be able to restart it first. Preferably without rebooting the whole server. However, I'...
Rob's user avatar
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How can I determine which processes are using up the most CPU?

05:54:17 up 6 days, 9:54, 1 user, load average: 15.70, 8.04, 4.56 Load average is a LOT higher than it should be. It was HALF of that a moment ago, I used ps aux to see which processes were using ...
Rob's user avatar
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Webalizer causing high CPU load

We use webalizer to generate reports on our Apache access logs - it is useful in conjunction with Google Analytics. The problem is that webalizer uses ALOT of CPU when running. If I run top I can see ...
Tom's user avatar
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3 votes
4 answers
7k views

Caching DNS server (bind9.2) CPU usage is so so so high

I have a caching-only dns server which get ~3k queries per second. Here is specs: Xeon dual-core 2,8GHz 4GB of RAM Centos 5x (kernel 2.6.18-164.15.1.el5PAE) bind 9.4.2 rndc status: recursive ...
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15 votes
3 answers
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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 ...
Bjørn's user avatar
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6 votes
5 answers
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CPU's on Hyper-V host system is just idling, even though VM's are at full throttle

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 ...
Bjørn's user avatar
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1 vote
3 answers
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Can a SQL Server have a CPU bottleneck when Processor Time is under 30%

Is it in principle possible for the CPU to be the bottleneck on a SQL Server if the Performance Counter Processor:Processor Time is constantly under 30% on all cores? Or does low Processor Time ...
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2 votes
2 answers
612 views

How to limit ram usage of a certain binary?

i have a binary, which indexes some stuff, it eats all my ram and my swap. Then the server hangs. I would like to limit its ram usage. I've looking at cpulimit and /etc/security/limits.conf but ...
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