The central processing unit (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.

learn more… | top users | synonyms (2)

0
votes
0answers
6 views

CPU and Memory Usage: Connect and disconnect [duplicate]

I'm having problems with consumption of the CPU and the memory. What of these options would help me to consume less? Option #1 Connect to sql server, execute the sql command and disconnect once it is ...
-4
votes
0answers
28 views

Intel Xeon E5645 vs Intel Xeon E5620 [on hold]

Which setup is more powerful / has better performance? 1x Intel Xeon E5645 Hexa Core 2.40GHz 2x Intel Xeon E5620 QUAD Core 2.40GHz Use case: Server (Virtual Host) for virtualizing 3-5 linux ...
0
votes
0answers
19 views

Comparing 1x Xeon multi core vs 4x UltraSparc IV

I'm in the process of reviewing specs for hardware running an Oracle server. The new hardware will be running using Xeon processor compared to the old servers (Solaris) running on UltraSparc IV. So ...
-1
votes
2answers
18 views

Server Configuration Interpretation

I wants to understand lscpu command output. CPU(s): 4 (Shows total number of CPU's) On-line CPU(s) list: 0-3 - (CPU sequence) Thread(s) per core: 2 - ? Core(s) per socket: 2 - ...
0
votes
1answer
19 views

Single Thread CPU Performance with PHP

I have a lamp web server running a website that is getting very feature bloated. I have a few pages that are taking 2-3 seconds of CPU time to render the PHP. Most other pages a processed in about .2 ...
-1
votes
0answers
9 views

Monitor QoS of a batch job

I am trying to find out which kind of metrics I can use to measure the QoS of a batch task. For instance a web-server the response time would be the appropriate metric. How can I measure that for a ...
0
votes
1answer
19 views

Upgrading CPUs for my HP G5 DL380 - will the cooling suffice?

Just a month ago or so, I bought my first rack server for some personal number crunching. It's been great fun playing around with and I'm thinking about upgrading the CPUs to get more bang for the ...
0
votes
0answers
16 views

Added additional CPU to server (IBM 7944 AC1) and FAN led is lit. Server powers off after a couple minutes

I've an IBM 7944 AC1 which I've installed an additional CPU into. The new CPU is the same model as the existing CPU. Upon installation of the new CPU when the server boots up it immediately displays ...
-1
votes
1answer
45 views

Will adding CPU cores or RAM to my cloud server improve speed in my situation? [duplicate]

I have a Siteground cloud server, and I know nothing about servers. It hosts 8 websites, although 3 of them have their own dedicated IP addresses and cPanels. It's on a Linux server, but there's ...
0
votes
0answers
13 views

Xen Vcpus State

hprvsr1 ~ # xl list Name ID Mem VCPUs State Time(s) Domain-0 0 1024 1 r----- 15.6 hprvsr1 ~ # xl ...
1
vote
3answers
1k views

ESX 5.5 with enterprise plus license but can not add more than 32 vcpu per vm

I have 40 available logical processors but can not allow vms to have more than 32 vcpus? what is wrong? how to fix this?
0
votes
1answer
36 views

Server 100% CPU At random times

I have a server with 12 Cores Intel XEON CPU, and 128GB RAM. The server is dedicated, not a vps. root@xx:~# lsb_release -d Description: Ubuntu 14.04.3 LTS At random times the CPU is going to ...
0
votes
1answer
37 views

Possible to upgrade an existing ESXi Host Server (2 CPU sockets, 1 used) with a new, different CPU?

I have a server which has 2 CPU Sockets and I used only one of the sockets so far. I have VMware ESXi V.6.0.0 installed and running. I know that the free version supports 2 physical CPU, so in order ...
1
vote
0answers
24 views

DIMM rank interleaving mechanism

I read this about rank interleaving: http://frankdenneman.nl/2015/02/20/memory-deep-dive/ Interleaving is continued from interleaving across the channels to interleaving across the ranks in a ...
0
votes
0answers
39 views

Nginx + php5fpm benchmark (with AB) and performance increase

I have a Webserver in a Debian wheezy VPS with 8gb SSD, 2Gb RAM with a Dual Core Intel processor. Web service is Nginx (2 worker_processes), with php5-fpm + mysql. I'm currently doing some website ...
2
votes
2answers
49 views

Windows Application/process CPU usage including history

I'm looking for a tool that can help me figure out what application/process that is using my CPU? Issue: Some evenings, one server uses 100% CPU. Only some, and never in working hours. (OS: Windows ...
0
votes
1answer
62 views

CentOS CPU load and CPU Freq

I have some Dual Xeon (X5650 @ 2.67GHz) server, with 72GB of RAM and HT disabled, but I have a problem. I host srcds servers (game servers) and they are really CPU intensive. The CPU usage is usually ...
1
vote
1answer
115 views

htop 100% fake CPU load

Recently my VPS show 100% CPU usage of all cores in htop and observium, but there is no process that uses > 5% CPU. In fact, the statistics of my VPS host shows there is no activity at all. Is this a ...
0
votes
0answers
23 views

Calculate CPU cores and RAM needed [duplicate]

In case you have a Linux cloud server and it's obvious that it's not using all resources assigned to it, is there a magical formula to calculate how many CPU cores and how much RAM I really need ...
2
votes
0answers
55 views

When I ssh to my oracle server, the CPU load reduces

I am facing strange issue on an Oracle server. The server is on high CPU load everyday for around 5hrs. This starts everyday at around 03:46 AM and continues for next 5 hrs. CPU load reduces ...
-2
votes
1answer
44 views

is it possible to hack a server motherboard to support two desktop CPUs [closed]

Is it possible to install or hack two desktop CPUs, e.g. two Core i7 instead of two Xeon into a server motherboard? If not why? Thanks
1
vote
0answers
26 views

100% CPU usage with [duplicate]

My server is having a problem with high cpu usage and 503 error occured all the time for a certain domain which is being hosted on my server together with other websites. The other websites on the ...
0
votes
0answers
31 views

App not using all cores on VM after migrating host

We have a DL380 G7 with 2x Xeon E5645 processors running at 2.4Ghz, on which we had ESXi 4.1 installed with a few VMs. One of our VMs had Windows Server 2008 R2, with 4x vCPU and 12GB RAM. This was ...
2
votes
0answers
50 views

What does Process/CPU metric in atop really mean?

I've been using the excellent atop for reviewing load test impact in detail, and the distinction between the SystemLevel/CPU metric in the top (system-wide) section and the ProcessLevel/CPU metric in ...
0
votes
1answer
105 views

C# App (mono) running inside docker gives huge CPU Spikes

I have been looking at this for quite a while. We run a server that has multiple Docker containers, one of them has a Mono server application written in c#. The base image is phusion base ...
2
votes
0answers
80 views

Ubuntu | Mysql Server 300-750% CPU

I have already done a lot of adjustments to the MySQL Configuration, but unfortunately I always get back to time utilization very high CPU. Multiple MySQL processes partially between 200-750% CPU / ...
4
votes
1answer
199 views

ESXi 5.5 CPU Sanity Check

In the BIOS of my server I have 2 X 2.26 quad cores, however in VMware I only see 2 cores per CPU ? Surely this isn't right? Processor Cores and Processor sockets should show as below: ...
4
votes
2answers
493 views

Linux: Why does the CPU frequency fluctuate when using the performance governor?

I'm using a Debian 8 amd64 machine for benchmarking. During experimentation, I would like the CPU to operate at a fixed frequency (preferably the maximum possible). This will rule out the CPU clock ...
-1
votes
2answers
51 views

Harpertown vs Sandy Bridge [duplicate]

I planning to upgrade one of my old harpertown based server to a new alternative but when I look at the comparison, this new one doesn't seem to be better at all, matter of fact if I look at the clock ...
0
votes
0answers
45 views

Sudden increase in my CPU usage during random moments(Win Server 2012)

At random times, no matter if I am online or not I see that my server having increased Process usage spikes, as you can see in the picture: So I go inside the Dashboard on the Server Manager, look ...
0
votes
1answer
38 views

IBM X3500 M3 upgrading Intel Xeon E5507 and 5520 Compatibility

I have an IBM X3500 M3 IBM server with one processor installed. I want to add another processor to the server. I want to know if this is this fully compatible with already installed processor E5507. ...
-1
votes
1answer
56 views

Ubuntu CPU I/O Rate Spike

Getting really crazy spikes today on a Ubuntu server for CPU / IO. CPU Chart is showing as much as 210% CPU usage - no idea how that is possible. IO has gone as high as 11912. (Usually well under ...
1
vote
1answer
261 views

cpufrequency scaling with debian 8.1 and Intel XEON E5-1650 v3

I want my server with debian 8.1 not to use cpu scaling but always run at the highest possible frequency. I have installed cpufrequtils $ dpkg -l | grep cpufreq ii cpufrequtils ...
0
votes
0answers
71 views

Intel Core i7-950, Supermicro X8STi not using intel_pstate driver

In my server I am using an Intel Core i7-950 on a Supermicro X8STi motherboard. While the processor is working fine it, is not using the special Intel CPU driver called intel_pstate. Even though I set ...
0
votes
0answers
66 views

Apache Processes Randomly go to high CPU for 25 minutes on EC2/RHEL/Glassfish4

I have a server that receives large POST (100,000 chars max) requests and passes them back to a Glassfish4 application server using mod_jk. The requests are POST requests with a content-type of ...
0
votes
1answer
38 views

What does it mean when a process's cpu utilization seconds does not increase even though the process is clearly running?

On a Ubuntu 12.04 system, I'm running redis. Our monitoring looks at the redis process and grabs cpu utilization out of /proc/pid/stats. Great. For tens of seconds, this number does not increase at ...
-1
votes
2answers
51 views

Minimum requirements seem to much for a 32 bit application

I am a developer using high level languages like C++ and .NET. One of the external applications I support will be upgraded soon. I have received the following minimum requirements for the upgrade: ...
0
votes
0answers
9 views

slurm+drmaa tasks vs cpus

What is the definition of task in slurm and drmaa and how is cpu in relation to that? When I have a progam prog that takes a parameter -n for the number of sub-processes it starts, do I need the ...
0
votes
1answer
34 views

Underclocking/undervolting AMD Opteron Processors to lower TDP rating

How does one safely lower the TDP rating of Opteron CPUs? I am willing to sacrifice some power, but wish to keep stability. Background: I have a TYAN S4985 Motherboard with 4 quad-core Opteron 8380 ...
5
votes
1answer
424 views

Do I need a CPU that supports Virtuallization to do Containerization?

I've read that Containerization is cheaper than virtualization; I know that containerization uses less resources than virtualization since there's only one OS involved and no virtualized hardware. ...
0
votes
0answers
215 views

Mapping uWSGI processes to specific cpu cores

I have 2 sites on my server (debian) with 4 cpu cores. For both of them I use workers=2 and cpu-affinity=1 so workers are mapped to cpu 0 and 1 for both sites like that: spawned uWSGI master process ...
0
votes
0answers
30 views

PowerEdge 1950 II fault server freezed

Server is a PowerEdge 1950 II 2x Intel(R) Xeon(R) CPU E5345 @ 2.33GHz 8x DDR2 FB-DIMM - Synchrone 1024 Mo log says: Tue May 26 22:56:04 2015 Multi-bit memory errors detected on a memory ...
0
votes
1answer
69 views

Skimp on CPU or skimp on RAM? [duplicate]

I'm upgrading to a dedicated server, and I've decided between two servers, but I don't know which to choose. The differences between the two configurations are: Server 1: Intel Xeon W3520(4 cores/ 8 ...
0
votes
0answers
160 views

digitalocean server cpu is 75% all the time

I have a nice server in digital ocean, it's the 1GB ram size. It has installed: php, mysql, nginx, supervisored, beanstalkd as I installed. But the problem is the I see that all the time the cpu is ...
1
vote
2answers
397 views

X5690 compatibility + HP DL360 G6

Does anybody know if the X5690 is compatible with the HP Proliant DL 360 G6? I got a pair of X5690s and a DL 360 G6 but i am unable to get any video signal. The fans spin up like crazy and that is ...
1
vote
0answers
356 views

IIS Worker Process Thread Count

I've seen this question asked but the answer given was either insufficient or unrelated. I feel like this is a pretty simple question(s). We have a Classic ASP app running on IIS7.5 on a Windows 2k8 ...
0
votes
0answers
16 views

Will KVM cpu utilization affect other KVM hosts? [duplicate]

I have got 4 kvm host with a total of 4 cpus cores assigned (on a intel core i7 3ghz). If one kvm host will take high cpu utilization (like 100%) will it affect to the other kvm hosts?
1
vote
0answers
651 views

High CPU Usage and hangs randomly with HHVM

I'm using phpbb on Centos 7 with 512mb of ram and 1 core. And I'm having randomly hangs and high cpu usage when I get some url of my clean phpbb installation. This is my server.hdf file: idFile = ...
3
votes
1answer
44 views

Multiple Processors and Ram

Currently we have a hosted server that has one multi-core processor. We are looking at purchasing servers and one of the options is to add an additional processor (So there would be TWO multi-core ...
-1
votes
2answers
137 views

How to run a single-threaded application on multiple processor cores efficiently? [closed]

There is this old application that we are using (called Aldfaer) that only uses a single thread. One of its processes takes about 90 minutes to complete at this moment, and we would like to decrease ...