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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26 views

Home NAS Server CPU [closed]

I want to build a home use NAS server and I am looking at the CPUs available. The NAS will mostly be used as a multimedia server which will be on the same network as a smart LG tv of the LM series ...
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18 views

CPU for General Purpose VM Host, GT/s or Clock speed [closed]

I am planing on buying new server hardware. The outline is about 64GB of RAM, one CPU, 256GB SSD (dont need much storage) I want to run some VM on this. The most powerful will be the new ...
0
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0answers
23 views

Counterintuitive drop in CPU

I am running a memcached service in a linux container pinned to a specific physical core. As expected the CPU increases when the number of requests increase. The requests are sent from a workload ...
2
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1answer
28 views

Different server response time for 2 web pages with the same view and template?

I've recently been facing hugely increased server response time for some of my web pages (response time in the range of 10-20 seconds). For example, for the page http://www.edmhunters.com/afrojack/ - ...
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1answer
20 views

Dell R410 and X5690 wont boot

I have an R410 that we opened up to upgrade from 2 x E5520 to 2 x X5690. However after the upgrade network didnt work and we could not even get a monitor output. We tried swapping CPU positions and ...
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0answers
16 views

Server Specifications for Encoding Videos [duplicate]

I want to know the CPU configurations should be for a HD video streaming server. It is supposed to serve around 20-30 people simultaneously over wireless local network (No internet). The content ...
0
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0answers
49 views

High CPU load because high CPU time for sys

I am using MariaDB galera cluster with two nodes + one node for arbiter. My system has 24 core CPU. I am getting stuck with CPU bound. Sometimes, my system consume CPU time to 1000% and CPU load get ...
0
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0answers
8 views

Take RAID 1 too much CPU performance (Intel Pentium G3220)? [migrated]

I'm currently building an home server. I'm using an Intel Pentium G3220 CPU. I want to configure RAID 1 for the two 3TB Western Digital WD30EFRX Red HDD in the server. My question is if software RAID ...
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0answers
14 views

Why a quad-processor with enough free RAM and low CPU usage become very slow? [migrated]

In a computer with Intel Core i3 and 4GB of RAM running Windows 8.1 build 9600, in conditions I expect no have performance problems it become very very slow and it's close to freeze (or even freeze ...
1
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2answers
54 views

Numbering scheme for CPU affinity

In the VMware Infrastructure Client (no vCenter), under the Resources / Advanced CPU section of each VM's Edit Settings dialog, there is an option to alter the Scheduling Affinity of a VM. It sets ...
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votes
1answer
51 views

High IO wait when test disk with dd

My server is using two SATA disk Raid 1. I test disk using dd #!/bin/bash i=0 MAX_LOOP=10 while [ $i -lt $MAX_LOOP ] do dd if=/dev/zero of=/data/output bs=1G count=10 ((i++)) done ...
2
votes
2answers
135 views

Choosing CPU configuration for small NAS

I am going to build an small 4 disks NAS server with FreeNAS/ZFS. I've read that due to ZFS performance 8GB is the recommended amount of RAM for the solution, but I wonder about the CPU. Currently I ...
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1answer
42 views

What is the effect when I reduce the number of physical CPUs in a Windows Server 2008 machine

I need to reduce (remove 2 CPUs) the number of physical CPUs in one of our servers (4 CPUs to 2 CPUs). Does it have any impact on the Windows Server 2008 operating system? I mean, do we need to ...
1
vote
1answer
131 views

High CPU utilisation w3wp.exe - GC issue?

I've inherited a website that uses a lot of session state. We've recently experienced continuous high CPU ~95-100% for prolonged period of times. When debugging using DebugDiag, it shows that there ...
0
votes
1answer
85 views

Can RHEL5/CentOS5 be run on Intel Haswell-EP (E5-26XX V3) CPUs?

We need to upgrade the hardware on some of our CentOS 5.11 servers. From Redhat's Intel CPUs and Supported RHEL Versions page, I see that the E5-26XX V2 CPUs are supported. However, the E5-26XX V3 ...
17
votes
2answers
1k views

How are CPU time and CPU usage the same?

In the Wikipedia page for CPU time, it says The CPU time is measured in clock ticks or seconds. Often, it is useful to measure CPU time as a percentage of the CPU's capacity, which is called ...
41
votes
5answers
15k views

On a dual CPU server, is it normal for one CPU to run hotter than the other?

I have a dual Opteron server running Linux with libvirt to host several VMs. The VMs work fine and the server processes OK, but I notice one CPU always runs about 69C (throttles at 70C) and the other ...
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3answers
125 views

Oops in syslog and freeze the server with docker

I've got following exceptions after my server freezes and reboot for 2 times I cannot tell the relevant with docker, but it happends every time I started some containers and I cannot find any useful ...
0
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1answer
78 views

Can I perform an IPMI bios update without a supported CPU?

I'm considering to build a server using the Supermicro X10SLL-F board with a Xeon E3-1231 v3 CPU. However, according to my research, this CPU requires a BIOS update (unfortunately Supermicro does not ...
1
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1answer
106 views

Website performance sluggish - High CPU and Disk Usage

Over the past couple of days my website's performance has been very sluggish, with queries taking a lot of time to execute. My CPU usage hit around 100% 4 times this week. Here is the output of top at ...
0
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1answer
51 views

PostgreSQL queries slower than before?

I am using PostgreSQL 9.3 server on my production server. Everything had been working fine for the past couple of months. But since the past week or so, PostgreSQL seems to have becomes very slow with ...
0
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0answers
60 views

Increased CPU usage and server response time

Over the past 10 days, I'm suddenly experiencing increased CPU usage on my website with CPU usage reaching 100% three times. During that time I'm unable to SSH to my website so I haven't been able to ...
2
votes
2answers
147 views

Sudden increase in CPU usage and server response time

Over the past 10 days, I'm suddenly experiencing increased CPU usage on my website with CPU usage reaching 100% three times. During that time I'm unable to SSH to my website so I haven't been able to ...
1
vote
1answer
70 views

Can I safely mix RAM (ECC) sizes in a server board?

I have a server (actually used as workstation) with a Supermicro X8DA6 motherboard, with 2 installed Intel X5650 processors. It uses ECC RAM. It currently has 6 Kingston KVR1333D3D8R9S/4GHB dimms ...
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0answers
172 views

Amazon EC2 T2 Small Instance CPU Usage Exceeding Limits

I am running WHM/Cpanel on an CentOS6.5 AMI on a Amazon EC2 T2.micro Instance. T2 instance baseline performance and ability to burst are governed by CPU Credits. Each T2 instance receives CPU Credits ...
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3answers
167 views

Desktop CPU VS server CPU performance - is passmark relevant?

I am replacing my SOHO server (desktop-grade components) with a used server. A quad-core i5 is being replaced with dual quad-core Xeons X5355, here are the details: i5-2300, passmark score 5276: ...
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votes
1answer
48 views

Amazon G2 not giving a much better computing performance than my laptop CPU [closed]

I have a Java console application that performs Reed-Solomon error correction on large volumes of data (~700 MB at a time), just to test performance. The application is multithreaded, I can see it ...
0
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1answer
58 views

Do blocking input ports increases security?

1-Do blocking unused input ports in firewall increases system security? How? (as there is no daemon listening on those ports anyway) 2-Do dropping those unused ports will positively or negatively ...
4
votes
3answers
644 views

How does Linux distribute load on multiple CPU cores

Let's say I got 2 quadcore processors (8x 2,13Ghz). The server runs multiple programs which can only utilize 1 core + Nginx and Apache worker at the same time. The question is, does Linux efficiently ...
4
votes
4answers
731 views

vCPU performance between 1 or 2 vCPU's

Within virtualisation (Predominantly VMware) is there a performance advantage using either 1 CPU with 4 cores or 2 CPU's with 2 cores? Let's assume the application running on a VM can use two CPU's.
0
votes
1answer
39 views

CPU clarification in vCenter

So i'm running a lab on a Dell PE R410 2 X 4C 2.26Ghz, this evening I saw that vCenter is showing that the processor is @ 2.27Ghz. It's not that big of a deal but was curious as to why there is that ...
0
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0answers
74 views

Dual core CPUs stall with Docker on Ubuntu Linux

I have seen performance degradation after half an hour to one hour with machines running Celery (Django/Python), or Storm under Docker containers with Ubuntu base on Dual-core CPUs on AWS. I see ...
0
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0answers
59 views

Avira Webgate Troubleshooting: High CPU load

we are using Avira Webgate as Virusscanner for squid. We have two Servers running the Avira Webgate and see in both servers the same behaviour: The CPU is nearly always at 100% CPU whicht is fine on ...
0
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0answers
123 views

High CPU Utilization from apache tomcat

In our environment, we have two tomcat servers on a windows environment which are load balanced. Server 1 has normal CPU utilization whereas Server 2 has almost/more than double the CPU utilization of ...
0
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0answers
18 views

Machine Check Exeption

I got a Machine Check Exception error earlier, Does this mean my CPU is corrupt? What is the problem here? I keep getting this error randomly and the system shuts off.
2
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1answer
199 views

CPU error messages shown in console during boot — “CPU1: Stuck ??”

I recently installed a second CPU into a server. The CPU is identical to the first and I verified that the CPU is in good working order prior to the installation. The server booted up and I installed ...
0
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0answers
42 views

How to estimate server load?

I know a time of some cryptographic operation - let's say, for instance, it takes 0.4598s to perform a cryptographic action. I have a Intel Xeon 3.00GHz CPU (multi-core). How can I calculate (I skip ...
0
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1answer
123 views

Strange CPU spikes with MySQL

On my server (ubuntu 12.04) mysqld started to show some strange CPU spikes. I've logged some of it as a sample: http://pastebin.com/4MwKUVwL The value after the triple dash '---' is the cpu usage ...
2
votes
1answer
138 views

Set default numa policy to “interleave” system wide

I know it is possible to set the numa mode to "interleave" (see NB below) for a specific process using numactrl --interleave, but I'd like to know if it is possible to make this the system wide ...
0
votes
1answer
165 views

Can you put different CPUs in a dual-cpu motherboard?

I have an ASUS KCMA-D8 motherboard with two Socket C32 CPU sockets. Only one is used right now. Can if put a different (better) CPU in the other socket and have the motherboard use both? Or do ...
1
vote
1answer
306 views

difference between taskset and cpuset

I'm trying to reduce the latency of my linux network application. I've learned that there are two tools for "binding" a program to particular CPU core: taskset and cpuset. Which one should I prefer? ...
0
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0answers
115 views

What bus size does the armadaxp CPU with armv7l architecture of a Synology DS214 have?

less /proc/cpuinfo prints Processor : Marvell PJ4Bv7 Processor rev 2 (v7l) processor : 0 BogoMIPS : 1064.96 processor : 1 BogoMIPS : 1064.96 Features : swp ...
0
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0answers
255 views

HIGH CPU usage by PHP on a VPS Magento Server

My server running magento is 4gb ram and 4 core cpu. But still i am struggling with the high CPU usage. I only have 10 visitors at any given point of time. I am not sure if the PHP has to take this ...
0
votes
1answer
31 views

Does enabling more IIS logging fields consume resources?

It seems that IIS7 doesn't enable the bytes sent and bytes received fields in its logs by default. I would like to enable them so I could watch bandwidth consumption of individual sites, but my ...
6
votes
2answers
546 views

ESXi and Windows Server CPU parking

For those that don't know, CPU parking is a feature in recent Windows Server releases that allows Windows to pretty much drop a CPU core to zero use, and having nothing use it. It's been introduced as ...
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votes
1answer
121 views

High load of RAM but low CPU

I've a dedicated problem.. When I make a load test with ~500 connections, CPU stay low (about 30%) but memory grow up fast ! And I have a 100% used RAM and 50% used SWAP.. An other dedicated with 2x ...
0
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2answers
64 views

Windows Server 2012 - Trace CPU Spike / Takeover

I have had a problem in the last few days where every 10-15 minutes, my entire server goes non-responsive, shutting out all TCP connections, for about 3 minutes. I finally found that the connections ...
29
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1answer
1k views

Is it possible to influence the way CPUs are enumerated under Linux?

I have a HP DL380 G7 with 2 mismatched CPUs in it. One is a quad core CPU with faster cores, and one is a 6 core CPU with slower cores. On this box I run an application that due to licensing reasons ...
1
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4answers
111 views

Proper way of interpreting system load on a 4 core 8 thread processor

As we all know, load of 1.00 on a single processor means that there is a load of 100%. Analogically a 4.00 load on a quad core would be 100%. How should I interpret load on a 4 core 8 thread ...
0
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0answers
66 views

Efficient way to use maldet scanner

I don't know if this is the right place to ask this question or not. Sorry if this is not the right place. I have installed the maldet (Linux Malware Detect) scanner to scan malware from the server. ...