CPU is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer.

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MySQL runs at >=100% CPU, heavy disk I/O?

Recently my Debian Linux server has been experiencing slow web server response times. I've investigated and it seems that MySQL is the culprit, yet there are no slow queries indicated by the slow ...
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1k views

Ubuntu Server 12.04 CPU Load

I have a Server (2x Hexa-Core Xeon E5649 2.53GHz w/HT with 32GB RAM and 20000 GB Bandwidth) running Ubuntu Server 12.04 LTS. The server runs LAMP and serves one website only, the estimated number of ...
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3answers
947 views

HP Proliant DL320 G5 CPU Fault Led

My HP DL320 G5 will go through post, even start the boot sequence from the CD, but halts with the CPU Fault LED glowing red. Each time I go back to BIOS the date is always reset to 2007. The server ...
2
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1answer
2k views

Why does mpstat show different values when I use the interval setting?

Here's the output I get when I run mpstat: $mpstat Linux 3.2.0-30-generic (my-laptop-C650) 09/17/2012 _x86_64_ (2 CPU) 05:32:01 PM CPU %usr %nice %sys %iowait %irq %soft ...
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4answers
299 views

Does shutdown idle VMs improve the performance?

Often our team members are coming to me with a compliant that their VMs are slow. Our team members suggested to shutdown some of the VMs temporarily and try to access the VM. But most cases that ...
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1answer
220 views

How to disable specific CPUs in Linux 2.6.26.2

I have an old machine running Linux kernel 2.6.26.2 which is behaving oddly. I suspect ONE of the CPUs is possibly heating faster than the other. I want to run some tests with specific CPUs/cores ...
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5answers
3k views

CPU?: Not responding

I'm attempting to build a system for co-location. I've been running into issues while trying to install CentOS 6.3 System Specs: Motherboard: ASUS m5a99x Process: AMD FX-8120 (8-core Bulldozer) ...
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1answer
434 views

Why can not use 'Engineering sample' cpus? [closed]

I've seen some used CPU offers on ebay, with very attractive price tags. However we are being told that the cpu is an 'Engineering sample' and can not be used on servers in Europe and North America. ...
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1answer
182 views

Can I mix two cpus with a different clock speed on a board?

I have received an old server which has a xeon E5405 (2GHz) processor. I'd like to buy and add a more powerful cpu (something like Xeon X5492) which has a higher clock speed but the same LGA 771 ...
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1answer
322 views

High CPU usage resulting in server crash

running out of ideas to explore. First off - let me warn you - I'm a programmer, not a systech :) Here is the situation. Dedicated server (LAMP) running a fair amount of sites. mySQL server is on a ...
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1answer
154 views

why did i need to stop java software? [closed]

i am on Debian Squeeze, 4G of Ram, 1G of Swap, CPU i3 3.07GHz. I used to use the following java softwares: jenkins elasticsearch Problem was their process was too greedy about CPU, in the top ...
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1answer
244 views

What CPU is equivalent? Moving from VPS to Dedicated Server. [duplicate]

Possible Duplicate: Can you help me with my capacity planning? I want to move from VPS to Dedicated Server I guess that VPS specifications are not equal to Dedicated Server and I predict ...
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4answers
3k views

Do all LGA 1155 Motherboards work with all LGA 1155 CPUs?

Hardware is an area that I have very little competence in. I've recently been tasked with the creation of a new server for the company I work for. I've priced out a motherboard and CPU for the ...
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1answer
1k views

Single-threaded application being balanced across CPU cores?

Is there an easy way to check whether a certain single-threaded application is being balanced across CPU cores by Windows? I have already tried Process Explorer but I could not find a way to read it ...
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2answers
1k views

Determining the number of virtual processors for a CPU

I have a Windows Server 2008 R2 Datacenter with the Hyper-V role enable. I am planning to run 11 VMs (each with 4 vCPU) on this host. There is 1 CPU installed on the host computer. I would like to ...
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1answer
336 views

kvm - cpu cores are disabling and enabling in a loop

On our virtualisation server with KVM, cpu cores are disabling and enabling in a loop after 10 minutes (every disable results in 15 seconds hang for all virtual machines). It happens from ...
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2answers
278 views

how to control system load of a particular process? eg. Java

So Java has been hanging our systems. Our developers are still looking into this but as an Admin what can be done. On a dual socket system with altogether 8 cores, Load peaks at 40's.. On average ...
2
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1answer
413 views

Ubuntu: irqbalance - new install - does it need a reboot?

Ubuntu 10.04 kernel 2.6.36 some of our VPS's were crashing the last few days due to cpu load with Java (cpu_hung for 120 seconds errors on console) installing irqbalance seems to have resolved the ...
2
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1answer
372 views

MySQL started to consume about 40% of system CPU time and got unresponsive suddenly

I use Debian 6.0.3 x86_64 and MySQL 5.5.20-1~dotdeb.0-log from the Dotdeb repository. MySQL process started to consume a lot of "sy" CPU time serveral hours ago according to this graph. I was not able ...
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1answer
249 views

named 9.7.3 takes lots of CPU on Centos

My named is taking ~60% CPU on both cores (2 instances of named). It is resolving ~12 domains per minute and has ~20 cached requests per domain within 5 minutes. The named cache size is 400MB. Is ...
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4answers
23k views

KVM: Which CPU features make VMs run better?

We are using Ubuntu 12.04 with the following parameters: Dell R910 Kernel 3.2.0-25-generic #40-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux kvm 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu13 qemu-kvm ...
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1answer
447 views

EC2 Amazon Linux AMI MySQL CPU @ 62% When Idle?

I am running MySQL on an Amazon Linux AMI. There is nothing connected to it. There are no connections and no other applications running that use MySQL. It is completely idle, but yet, top is reporting ...
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2answers
625 views

Is It Possible to set cpu affinity for particular user?

I mean is their any way we can set up cpu affinity for particular user, for all his currently running process or for process which he will start later?
4
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1answer
227 views

Apache HTTPD process cumulative cpu time

How can I aggregate all Apache HTTPD processes' CPU time usage to be able to compare them with other running processes' (MySQL, Java, ...)? Or how much CPU time does HTTPD needs compared to MySQL for ...
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1answer
2k views

(VM)Win Server 2008 R2 is only showing one CPU but has 4 allocated

Xen Server 5.6 Sp2 The VM is Windows Server 2008 R2 Standard 4 vCPUs have been allocated The machine has been rebooted and has correct version of xen tools installed. In the device manager I see 4 ...
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2answers
1k views

kvm and qemu host: Is there a limit for max CPUs (Ubuntu 10.04)?

Today we encountered a really strange behaviour on two identical kvm and qemu hosts (Dell R910). The host systems each have 4 x 10 Cores, which means that 40 physical cores are displayed as 80 within ...
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1answer
304 views

Why does cpuinfo report that my frequency is slower?

My machine is running off of a AMD Sempron(tm) X2 190 Processor. According the marketing copy, it should be running at around 2.5 Ghz. Why is the cpu speed being reported as something lower? Spec ...
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1answer
132 views

Heatsink for Quad core Xeon that draws same power as Dual core? [closed]

I have a Dell Precision 490 that has two LGA771 sockets and only one occupied socket - with a Dual core E5130 Xeon CPU running 2.0GHz rated at 80W TDP and it has on it a 80mm passive heatsink. As the ...
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1answer
57 views

does my machine configuration make sense? [duplicate]

Possible Duplicate: Can you help me with my capacity planning? i couldn't think of a better place to ask this question, so here it goes. we're putting together a dedicated server for a ...
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2answers
108 views

What are the advantages of getting an expensive server? [closed]

Server CPUs cost multiple times more than Desktop CPUs; so do Motherboards and PSUs. What are the advantages of getting a server system rather than a desktop system? Stability can be one, but what ...
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3answers
7k views

How does top calculate CPU usage on a Linux system with a single core?

How is CPU usage calculated on a Linux system with a single core? Cpu(s): 28.1%us, 6.5%sy, 0.0%ni, 43.0%id, 21.6%wa, 0.0%hi, 0.5%si, 0.2%st Please explain me how the us, sy, ni, id, wa, hi, si ...
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3answers
3k views

Diagnosing high CPU waiting

I have a monitoring server that is running icinga/collectd/graphite with about 50 hosts. I have noticed high load/slugging performance on the box. If you take a look at top, you'll see: Cpu(s): ...
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3answers
828 views

find Intel Processor Number for my cpu in linux

How to find out the Intel Processor Number for my CPU model on linux ? I bought a server from a webhosting company and I don't know which CPU model it has. I only know it is a Pentium D , dual core. ...
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2answers
2k views

Tomcat thread consumes maximum CPU

We have a Tomcat 7.0.21 server running on OpenJDK Server VM (20.0-b11 mixed mode). The webapp runs well for usually several hours or days after startup - typical CPU load is 1-2%. At some point, the ...
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1answer
53 views

Server configuration notation [closed]

What is the industry standard to specify Virtual machine configuration in a summary format? I have seen notations like these: 4 CPU x 8 GB RAM VM
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3answers
1k views

Is there a way to automatically restart MySQL, if it takes up too much processing power?

Due to some bad scripting on my part, MySQL sometimes goes haywire - taking up a lot of CPU power (load average of more then 20 - I only have 8 cores)! When I restart it is all good again. So my ...
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3answers
2k views

Very high CPU and low RAM usage - is it possible to place some of swap some of the CPU usage to the RAM (with CloudLinux LVE Manager installed)?

I had to install CloudLinux so that I could somewhat controle the CPU ussage and more importantly the Concurrent-Connections the Websites use. But as you can see the Server load is way to high and ...
0
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1answer
613 views

Multiple rdpthread.exe Processes Using 100% CPU

I have recently created a new virtual machine (running on VMWare ESXi) running Windows Server 2008 R2. I have noticed that the machine has been running slowing and looking in Task Manager I see about ...
0
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1answer
73 views

lighttpd CPU utilization fails to decrease when load reduced

I have a lighttpd server which easily handles about 800 concurrent connections. But there seems to be a problem: When the number of users grows, the CPU utilization grows as well, until a limit is ...
1
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3answers
598 views

I/O rate and CPU Eating up Server making terribly slow site

My server (Ubuntu 10.04 Lucid LAMP Stack) on linode (1024MB ram, 40 GB storage, 400 GB Transfer) is loading terribly slow. My site (WordPress) is relatively small (1.5 Gigs of mysql) and gets around ...
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2answers
401 views

debian zero cpu usage on process stat

I use debian linux debian 6 (Linux 2.6.32-5-amd64 on x86_64) and if I query the process stat list (ps or top) every process has zero cpu usage. If I query the apache stat there is also zero cpu usage. ...
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2answers
2k views

Linux Scheduler (not using all cores on multi-core machine) RHEL6

I'm seeing strange behavior on one of my servers (running RHEL 6). There seems to be something wrong with the scheduler. Here's the test program I'm using: #include <stdio.h> #include ...
1
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1answer
469 views

How does Oracle Database Standard Edition (One) benefit from running on a dual CPU server?

I am evaluating the impact of additional CPUs on Oracle database performance. I am looking to license Oracle Standard Edition One (SEO, being most cost effective) or Oracle Standard Edition (SE). As ...
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1answer
116 views

Is PostgreSQL database optimised for any particular CPU? [closed]

This question may sound strange, but some CPU have instruction sets for virtualisation technologies, while some non-related software can use those sets, or even GPU to improve their performance. So, ...
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3answers
372 views

Windows time command equivalent

There is a command in Linux that outputs system utilization called time. Is there a Windows equivalent? Or how else can I manually use the task manager commands in a batch file?
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1answer
951 views

monitoring services, CPU, memory remotely on a Windows server machine

I'm looking for a tool that is able to (remotely) monitor CPU and Memory in a Windows server but most importantly, which service/process is using it. Or-- is it possible to monitor a specific running ...
2
votes
1answer
488 views

I/O and CPU differences between dedicated hosting and Amazon EC2

I'm looking to run a high population Minecraft server (150+ players online at a time). For those unfamiliar with the Minecraft server, it is a (non-multithreaded) application written in Java (some ...
3
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1answer
7k views

TrustedInstaller.exe Takes a lot of Memory in Windows Server 2008

Apart from taking a lot of CPU, TrustedInstaller.exe also take huge memory in my Windows server 2008. Any solution for this issue? BTW, Windows Update Service should be started definitely.
3
votes
1answer
1k views

Amazon EC2: how to find out detailed CPU usage?

I am running several EC2 instances, and I want to know the exact work my CPU is doing. On "normal" machines I am doing this with munin and its CPU plugin which looks at the statistics provided by ...
0
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1answer
468 views

top command occupied high cpu usage

My system is SUSE 10 and I observe that top occupies 57% CPU usage when I use it. I don't have too many processes: ps -eLf | wc -l 106 Here are top's stats: cat /proc/2913/stat 2913 (top) R ...