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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2
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2answers
62 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 ...
-1
votes
1answer
39 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
42 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
45 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 ...
16
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 ...
-1
votes
0answers
21 views

What server config I need to answer 600k request in every 15 minutes for 300 SQL Server database [duplicate]

I will have 300 SQL Server databases on my machine that must answer 600000 request every 15 minutes. This server has a valid IP address and all request come from internet channel. for now I have a ...
-5
votes
0answers
20 views

Mail Server Components [duplicate]

Lets make some assumptions. For this theroetical we are not going to worry about OS. There is a 1,000 Clients. They send 10-20 Emails a day. They receive 20-40 Emails per day. Maximum email size is ...
39
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 ...
-1
votes
3answers
81 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
votes
1answer
56 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
vote
1answer
73 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
votes
1answer
37 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
votes
0answers
50 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
0answers
81 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
47 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 ...
1
vote
0answers
90 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 ...
0
votes
3answers
70 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
45 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
votes
1answer
55 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
583 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
676 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
35 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
votes
0answers
64 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
votes
0answers
35 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
71 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
votes
0answers
16 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
votes
1answer
174 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
votes
0answers
36 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
votes
1answer
102 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
100 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
90 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
202 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
votes
0answers
93 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
votes
0answers
224 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
26 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
464 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
105 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
votes
2answers
55 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
votes
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 ...
0
votes
4answers
86 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
votes
0answers
53 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. ...
0
votes
0answers
75 views

Dell Poweredge R410 does not recognize second CPU

I have a Dell Poweredge R410 with two CPUs installed. I tried everything but the second CPU does not get recognized by the BIOS or the Linux Operating System it has. Both CPUs are Intel Xeon E5602 ...
2
votes
0answers
72 views

WPF application issues on AMD CPU vs Intel

I'm not sure if I should toss this on SO or not, I don't think its code based, so I'll start here. We are having an issue in the testing of our new product when using on an AMD CPU vs Intel. The app ...
1
vote
0answers
158 views

Getting high CPU usage on EC2 running Plesk

I've been running Plesk on an AWS EC2 instance for over a year with no major issues. All of a sudden yesterday I start getting severe CPU spikes / periods which has made my uptime about 16% over ...
1
vote
1answer
51 views

Historical CPU Utilization by Service Name In RHEL 6.2

I need to implement historical CPU Utilization by service name in Linux Red Hat 6.2. Is there any software or command which can provide such details ?
0
votes
1answer
16 views

How to interpret system load on a virtual server?

I understand that system load as reported by linux 'top' is the avg number of processes waiting for CPU time and you should thus take the number of CPU cores into account when interpreting the load. ...
0
votes
1answer
83 views

Why does Apache split up the CPU for www-data processes out of 100 or 200?

It seems like Apache always splits up the CPU usage for www-data processes out of 100 or 200. Why is this? For example, one www-data process = 100% CPU usage: http://i.imgur.com/mfRuOSm.png Four ...
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vote
0answers
102 views

Why my amazon m1.small ec2 instance goes 100% everyday at exact time

Not sure what is happening, my instance goes 100% CPU usage two exact times during the day one at 11:33 UTC and another at 3:38 otherwise rest of the day usage is under 10%. I didn't find: 1. Any ...
0
votes
2answers
160 views

Are AMD Opterons more reliable than AMD FX CPUs?

AMD Opteron CPUs are marketed for servers, and FX CPUs for desktops. However, both support ECC, and while only Opterons support registered RAM, the issue is unrelated to reliability. So, what makes ...
0
votes
2answers
40 views

rhev and number of cpus

I use RHEV-M to manage a cluster which has several RHEV hypervisor nodes. Currently, each node has 2 CPU sockets. My question is can I add to the RHEV cluster another node which has 4 sockets, and ...