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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565 views

IIS 6 - CPU throttling on application pools

So after a recent DDoS attack on one our sites that took down all sites on that server Ive started looking into ways to stop this being such an impact on all sites. If the site under DDoS goes down, ...
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76 views

Cloning a server across architectures

I have this Linux (Debian) server that I want to duplicate, with all its services and their settings. Actually, it is to replace the existing server with newer hardware. I'd like the process to be as ...
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1answer
108 views

SNMP tick counter wrap around logic

I'm trying to calculate CPU usage in percent over SNMP of a remote agent based on the ssCpuRaw* tick counters. As I understand it they are all of type COUNTER(32 bit) so tey'll wrap around to zero ...
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1answer
222 views

Ksoftirqd high load

Recently I notice that one ksoftirqd is always in top of my processlist and takes 90% - 100% cpu. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ...
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1answer
134 views

pbs check how much cpu a job is using / job % cpu usage

On a cluster a job is submitted to run on N CPUs. qstat -f doesn't show how much CPU resources the job is using other than the time. How does one check whether 100% of each CPU power is used? It is ...
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1answer
90 views

High CPU usage when sending email, site freezes

I just moved to a new dedicated server and I'm running into the following issue. I need to email 8000 of my users using the basic PHP mail function - nothing fancy, it's HTML-formatted but it's just ...
0
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1answer
65 views

SSL request freezing openldap

I had two OpenLDAP (a master and a consumer). The master is on Red Hat 6 and consumer was on Red Hat 5. Everything worked well until I upgrade the consumer in Red Hat 6. The sync between the two works ...
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1answer
31 views

MySQL Process Big

Ok, so I don't know if this is a repeat question so I'm sorry if it is (I couldn't find anything like it after searching =/) My server seems to be running what seems to me a larger than normal mysql ...
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1answer
213 views

Understanding CPU Throttle

kernel /vmlinuz-2.6.32-379.22.1.lve1.2.17.el6.x86_64 ro root=UUID=7cb0b445-0f63-4ef1-ab73-93c114d8ef6c rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto ...
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1answer
40 views

CPU Spikes when Untar'ing File on Virtual Server

I have a RHEL 5.5 on VMWARE running with 64GB Memory. When we untar a file (part of a daily process) the CPU Load sometimes spikes - rendering the server essentially nonresponsive. The disks are ...
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1answer
407 views

CentOS 5: is %wa too high or optimal?

i have question about waiting for HDD. I'm not sure what is optimal %wa. Server running browser game, i know that there is a lot hdd writing but im not sure what is optimal %wa. Server running 8 ...
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1answer
195 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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1answer
71 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 ...
0
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1answer
371 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 ...
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1answer
402 views

proceses cpu load history

I would ask if there is some linux tool that can track load of each application process and save it to the log file. When something in linux system "eat" CPU to 100% and I want see what happend and ...
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1answer
471 views

Unsupported CPU installed

I got a pc which was in need for an bios upgrade. I downloaded the bios update from the HP site. After the installation/upgrade from the bios and we restarted te pc we got the error: ERROR: ...
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1answer
169 views

Dell Poweredge 6950 CPU Upgrade

Does anyone know if it's possible to upgrade the cpus in this server to Opteron 8354. In this German version looks like it's an option. ...
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1answer
74 views

MySQL CPU High Usage

I got a problem with CPU usage on my VPS, mysqld use 100% CPU and my site go down, i have a small package, 512MB Ram, wich 300 is free, and my site has 1000-1500 unique visitors, and 50.000 views / ...
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1answer
272 views

We have Solaris 10 VM in KVM (ProxmoxVE) how to check if Solaris is using all cores?

I'm trying to figure out is VM Solaris 10 (which is virtualized with KVM on ProxmoxVE) using all allocated CPUs? Host HW is Dell poweredge r720. And find a way how to check that for example gzip on ...
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1answer
135 views

Kvm poor cpu performance

I have running some Minecraft Servers in a Qemu VM over Libvirt, and the performance is only half good than on real hardware. Libvirt started the vm over: /usr/bin/kvm -S -M pc-1.1 -cpu ...
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0answers
64 views

IBM xSeries 306 CPU Speed

I have an IBM xSeries 306. The system has been flawless until a week ago. It's a Pentium 4 Dual Core CPU. The CPU speed is 3.20 gHz. Now, it shows 4.26 gHz or 2.16 gHz when the POST screen comes ...
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0answers
152 views

Dtrace Oracle show high fsflush on solaris 10

Solaris 10 - Oracle 11G in a zone Running mpstat , i've noticed that one CPU was at 100% used every 5 seconds for 5 seconds while all other CPU were fine, in used but nicely spread. 1 0 0 0 ...
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48 views

Debian 100% cpu every 30 minutes but not loggable?

I have a Debian 7 x64 machine running with Digital Ocean that has every 30 Minutes a 100% cpu usage for about 1 minute. A couple of days ago it stayed there for a couple of hours so the server finally ...
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129 views

Does installing more CPUs (Intel) than indicated by “Max CPU Configuration” prevent all cores from being used?

I am looking at a server that has 4 physical processors, the Intel documentation indicates they are 6 core processors but this WMI query WMIC CPU Get NumberOfCores, NumberOfLogicalProcessors ...
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153 views

Dell Poweredge 2950 with E5430 Temperature

So I just picked up a few Poweredge 2950 servers and I have them set up with Windows Server 2012. I installed Core Temp to monitor CPU temperature. One server has a CPU operating temp of the following ...
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122 views

Which CPU metrics are more important for a 3D render node?

We're looking into adding about 50 nodes to our render farm at about $2,000 (+-$300) each. What I'm trying to figure out is which specs on a CPU are the most important for 3D rendering. We use 3DMax ...
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106 views

Using Perfmon counters only, how can I determine host CPU contention / overload?

I'm running VMWare and have an ESX host that is running at 100% CPU. I also have two Exchange 2010 CAS servers that are running at 100% CPU, Here are some additiona observations: The sum of the ...
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168 views

Nginx reverse proxy apache2 High CPU load

my server: 2x Intel Xeon 5506 2.13GHz 24 GB DDR3 RAM Debian 5.0.8 64-bit My server CPU is aroung 90% at 600 users and around 6 page views per second. There are 2 Sites on the server. One Forum with ...
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248 views

MIB2 SNMP OID to get physical CPU socket count?

I am trying to set up a monitoring system and I'm noticing that MIB-2 seems to only report the virtual CPU count (all cores+hyperthreading). I need to get the physical socket CPU count. Is there any ...
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0answers
575 views

Apache 2.2.16 with mod_php on Debian Squeeze CPU high load

Configuration: CPU 16 cores 14 GB RAM Apache 2.2.16 PHP 5.3.3-7 with enabled APC Apache mpm config: StartServers 50 MinSpareServers 50 MaxSpareServers 256 ...
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9 views

SNMP OID for CPU model information

I am currently trying to find the oid / way to gather the CPU model name from a server using SNMP. I have tried looking up the specific oid for it however all I could find were ones that related to ...
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20 views

False flag multibit errors on highest populated DIMM socket on second CPU of Sunfire x2200. Faulty CPU or faulty motherboard?

I'm testing 2GB ECC Registered DIMMs in a Sunfire x2200. Recently the system event log (SEL) began logging Multibit Errors on the highest populated DIMM socket on CPU1. With 8 DIMMs on CPU1, the SEL ...
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20 views

Understanding Logman - Processor Time

As part of a project I am working on, I have to monitor server/desktop performance to ensure there is no degradation as a direct result of my work. I thought I would set up some performance counters ...
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0answers
27 views

mpm worker - high server load

i have 10 wordpress site with this plugins : w3 total cache + wordpress seo my server load some time goes up. vps : 1gb ram , 4 cpu 2.6 mpm worker : StartServers 2 ServerLimit ...
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224 views

ksoftirqd causes very high cpu usage - server is sometimes completely unusable

the ksoftirqd process on my root (Ubuntu 12.04 x64 with kernel 3.11.6) causes occasionally a very high usage of the first cpu core (sometimes only 5 minutes, then 30 minutes long, ... it feels just ...
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68 views

Weird consistent EC2 CPU spikes

One of our m1.small EC2 instances, running a Node.js web server, regularly gets some CPU spikes. It doesn't seem to matter what the peak CPU reaches, but whenever our traffic approaches the max for ...
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0answers
110 views

Xen Kernel - Only One Core Showing

So I have a dedicated server running the Xen kernel but for some reason it only shows one core instead of 4? Does that mean that my VPS that is running is only getting access to the 1 core or do they ...
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0answers
74 views

Get an OpenVZ container's cpuload realtime in a bash script

I have a bash script which uses CPU cores rather intensively. Recently my VPS was suspended due to server load. The main reason is a cron job for a bash script which checks for Wordpress plugins and ...
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135 views

Why does Windows have such a loose processor affinity

A while back, I did some playing around with new Win2008 virtual machine and found some serious concerns. The server is Dell T610. 16gig, 4 core, 8 logical, 2.4ghz Xeon, 5600 series. ESXi 4.1.0 The ...
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0answers
100 views

Softirq has raisen without reason

Monitoring munin stats I found that on CPU's graph there was softirq value increased. What might be the reason? Currently I am experiencing problems with mysql cpu consumption. But how those things ...
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0answers
60 views

How to investigate Linux scheduler issues?

I have a Linux server process that should runs multiple threads at close to 100%, each on its own CPU. When I run the process on one server (see [1] below), the CPUs in question appear to stay pegged ...
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409 views

Ubuntu 12.04 64bit - What would cause high System CPU %sys during high MySQL loads?

128GB RAM, 32cores Xeon RAID 10 SSD. Mysql version is the latest 5.5 for Ubuntu 12.04 . We have a lot of queries - about 1800+ per second. During high MySQL load - 2700+% load on a 32 CPU system - ...
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103 views

cannot find high load cause

I cannot find high load cause. CPU usage is not high. Maybe disk is causing high i/o, but disk utilization is not that high too. The peaks around 4:30am is backup time and not that important.
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121 views

Cisco 7206vxr cpu reducing

I have a 7206VXR (NPE-G2) . At the rate of 140 kpps i gain 80% of cpu . So i looking for ways how to reduce it? So i want to turn off netflow(but don't want to this,monitoring is highly important for ...
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226 views

Why does CentOS Linux use cpu/core #1 so much more in a 4-core system?

I've been watching top and htop for awhile on a very active server and I am wondering why linux does not automatically use cpu affinity better? CPU #1 (actually core #1 of 4) is used much more ...
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67 views

ruby on rails process stuck at 0% cpu (Yes, 0%) on a leased VM

I have a leased openVZ linux vm over at chicagovps.net. I am trying to deploy a ruby on rails application on the same. The problem is: when I run the rails server process, I see that during server ...
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65 views

please assist me debug a stack trace

I am having an issue on a windows 2003 terminal server, where the system process is using a constantly high amount of CPU. I believe that it is the srv.sys that is causing an issue, but not quite ...
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165 views

Disk or CPU/RAM failure ? I can't figure it out

i'm having big trouble accessing my production servers (runnung xen); i recently bought brand new Western Digital (WD5000AAKX 500Gb) drives to replace the old drives; re-installed the system as it ...
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240 views

How to get the CPU speed (which maybe variant) on the fly?

I'm curious how to evaluate the current speed of a Amazon EC2 t1.micro instance, as there's burst time slots, the current CPU speed is not static determined, as shown in /etc/cpuinfo. Is there some ...
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13 views

DIMM disabled? Whats wrong?

i got a problem on my intel s5520hc motherboard now i got new RDIMMs but after installing them an error has appeared in the bios and said "DIMM_F2 disabled" but the DIMM is working i tried to reboot ...