The tag has no wiki summary.

learn more… | top users | synonyms (4)

1
vote
1answer
137 views

KVM host only using one core out of 8

This KVM host is only running one VM/guest right now, and it is running with -smp 1. Top shows only the first core being active. Is that expected when using -smp1? The guest OS is Windows XP. The ...
1
vote
1answer
67 views

Red Hat AS 64-bit and multi core chip recognition

We're running RH AS 64-bit 4.6 and for some reason after installing a Hitachi SAN driver, the kernal only recognizes 1 cpu of the 8 (4 dual core Opterons). This server hosts an Oracle 9i database, so ...
1
vote
1answer
730 views

MySQL MyISAM multi-core optimization

I've noticed that our app does not respond to requests when a demanding request is in execution. Running top seems to identify the source of the problem: top - 13:54:25 up 1 day, 13:43, 2 users, ...
1
vote
1answer
487 views

Quad Core but Single Core on task manager

ACPI Multiprocessor -> Check 4 Processor shown on Device Manager -> Check 4 Processor shown on Task Manager -> Nope OS -> Windows 2003 Enterprise 32Bit Should I see four processers on the Task ...
1
vote
1answer
57 views

Deactivating Cores option in SQL Server 2008

What is actually the difference between deactivating 2 of the cores as in this screenshot and having a dual core machine I guess is not the same as having a dual core machine, right? Do you know ...
1
vote
1answer
235 views

If SMP is disabled, does that mean I cannot use multicores? Or multiprocessors?

I've purchased a VPS for the sake of dev work, and had wished to install NetBSD under the Xen DomU guest. Unfortunately it is stated that this will work, however will not support SMP. Does this mean ...
1
vote
3answers
733 views

mpstat not showing all CPUs on CentOS 5.5 (64 bit)

I have two Quad Core XEON processors. When I run "mpstat" then it just shows combine figure of all CPUs like this: 12:16:44 AM CPU %user %nice %sys %iowait %irq %soft %steal %idle ...
1
vote
3answers
2k views

How to get Windows Server 2008 VM to use multiple cores

I have a Windows Server 2008 machine running in VirtualBox. On initial installation, only one processor was made available, but now I want to run it as a multiprocessor machine. I have made all four ...
1
vote
2answers
619 views

SQL Server 2005 preferring a single core per cpu?

HI folks, I've a SQL Server 2005 system, with 4 cpus in it each with 4 cores. It's currently mainly utilising just 4 cores, ie 4 hover around 90% utilisation at peak and the others closer to 30%. I'm ...
1
vote
0answers
304 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 ...
1
vote
1answer
612 views

AIX CPU Utilization behavior

We are facing a strange (for us) situation regarding the CPU utilization management. We have an lpar with 2 up to 4 online cores. While the application workload peaks, CPU usage is 100% (70% user + ...
1
vote
0answers
277 views

making use of multiple cores with autobench/httperf

I would like to benchmark a powerfull webcluster with autobench. The problem is that autobench (which uses httperf) can only use one core, thus limiting the amount of load that a client can put on the ...
1
vote
1answer
1k views

Nginx worker_processes and multi core cpu's - Do Hyper-threading cores count?

Quite often, when reading about the recommended worker_processes for nginx it is stated that this should be set to the numbers of cores the server hosting nginx has. We were wondering if we should ...
1
vote
2answers
98 views

Assigning cores to VM in vSphere

Complete vSphere newbie here... Background: So, I have a 12 core machine with 24 VMs on it. Currently, all the processing power is shared between these VMs equally. The question: Can I configure ...
1
vote
4answers
664 views

Free alternative to NI Real-Time Hypervisor?

Is there an free alternative to National Instruments' NI Real-Time Hypervisor? National Instruments provides both a Windows and Linux versions.
1
vote
2answers
153 views

Running multiple copies of the script - using cores or simply slowing the server down?

I have a small compact PHP script that monitors a beanstalk message queue on a CentOS 5 server. When it gets a message, it starts to undertake a particular action and once complete, goes back to the ...
1
vote
2answers
172 views

SQL server availability issue: large query stops other connections from connecting

I've got a high-spec (multicore, RAID) server running MS SQL 2008, with several databases on it. I have a low throughput process that periodically needs a small amount of information from one of the ...
0
votes
3answers
294 views

Linux: One cpu core is always in 0 use

Today I notice a very strange thing. One cpu core is always in 0 use . Is it a bug? Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi,100.0%si, 0.0%st Cpu1 : 37.7%us, 44.4%sy, 0.0%ni, ...
0
votes
4answers
756 views

Web- and DB-Server: High clock rate and less cores vs. less clock rate and many cores

I am currently looking into setting up a new infrastructure for a hosting project of mine. Basically it will be managed hosting with a strong focus on Django-based apps. All will be Linux-based of ...
0
votes
3answers
398 views

2 x Dual Core vs 1 x Quad Core Performance

A license restriction limits us to 2 x dual core servers, or one 1 x quad core server. Should we see better performance running 2 x Dual Core servers or 1 x Quad Core? Dual Core processors are ...
0
votes
4answers
1k views

How to force a process to run on a particular cpu?

I know that taskset can be used to force a process to run on a particular cpu. How can I force tomcat to run on a particular CPU? I then want to run apache bench on a seperate CPU. Update I ...
0
votes
2answers
313 views

Get processes running on a specific CPU core

mpstat -P ALL shows high %wa time on a single core from an 8 core CPU and I'm trying to figure out what's writing to disk. So how can I figure out what is running on that CPU core?
0
votes
2answers
396 views

Util. to tell me how many cores are being used under Win 2003 Standard

Confusion reigns about licensing, with the No. of processors that can be engaged by various versions of 2003/ 2008 server. Now that we have 6 core AMDs and future 8 core Intels, I wonder if hardware ...
0
votes
3answers
2k views

Only 1 CPU Core is used in IIS 7.5

I have the following configuration. Quad Core Windows Server 2008 IIS 7.5 4GB RAM 32 bit I have hosted MVC 1 application in this server. But when running this application yields that only 1 CPU ...
0
votes
2answers
844 views

Multicore license: ESX Vs Citrix Xenserver [duplicate]

Possible Duplicate: Can you help me with my software licensing question? VMware ESX is free for upto 6 cores per CPU only Vsphere Advanced version is required for 12 CPU cores does ...
0
votes
2answers
344 views

Is Pentium D915 plug compatible with Core 2 Quad?

I have a system: dual core pentium d 915 currently running at 2.8GHz with 2GB DDR2. I wish to upgrade it to be used as an application server. I wish to upgrade the processor and ram to 4GB. ...
0
votes
2answers
2k views

CPU Utilization of a multithreaded process

Background: I have a whole mess of systems running the 2.6.20 and 2.6.22 kernel in what started as a Fedora Core 2 install several years ago. These systems have 8 cpus, as reported by cat ...
0
votes
1answer
705 views

Hardware virtualization support for Core i7 + P55

I'm considering a hardware upgrade from AMD Opteron 1216 to a Core i7 920 or Core i7 860. I want to know if Hardware Virtualization (VT-X) is supported? I found the spec sheets online which say yes. ...
0
votes
1answer
115 views

Taskset not working properly in OpenVZ container

In a Debian OpenVZ container, I'm trying to use taskset to pin a process to a core, but it doesn't work: root@foo:/# taskset -c -p 0 1754 pid 1754's current affinity list: 0-7 pid 1754's new affinity ...
0
votes
4answers
111 views

Does using all cores reduce efficiency?

I have a program (well, php script) which does some pretty heavy text searching - it loads a 2mb and 40mb file and searches through them to find where each word that appears in the first is present in ...
0
votes
1answer
122 views

Windows Server 2012 - CPU utilization

I have Windows Server 2012 machine which has 32 cores. In Task Manager, it shows 32 cores and 64 logical processors, because of hyperthreading. My CPU utilization is in the screenshot below: Can ...
0
votes
2answers
1k views

VMware - Can a 1 vCPU VM use more than 1 physical core at the same time?

Assume I have a physical ESX host with ONE quad-core processor and hyper-threading disabled. This means it has a total of 4 physical cores or pCPUs. I create a single VM on this VMware host. I assign ...
0
votes
1answer
206 views

On Multiple Processors sytem, System load is high while most of CPUS are idle

See the following output of "top". Any idea? top - 17:33:25 up 7 days, 28 min, 4 users, load average: 12.04, 8.35, 6.30 Tasks: 477 total, 2 running, 474 sleeping, 0 stopped, 1 zombie Cpu0 ...
0
votes
2answers
632 views

How many cores are available in this case?

We're managing 2 production server. One is RHEL4 and other one is CentOS5. In order to find the load average, I need to determine how many cores the server has got. I used the command $ grep cores ...
0
votes
1answer
107 views

Single server investment for MPI and GridGain

Our department has $16k to buy computer hardware for high performance computation. The purpose is to do simulation and data analysis using multithreaded applications written with MPI or GridGain, so ...
0
votes
1answer
514 views

Q8300 Core-2 Quad vs X3360 Xeon

I'm looking at this ABMX server, and trying to decide on the CPU. I'm purchasing 2 servers, to be used as dedicated web and DB servers for a web site that has low traffic now but could ramp up ...
0
votes
0answers
53 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
133 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 ...
0
votes
0answers
31 views

How to troubleshoot the performance difference between two multicore systems?

We have two servers that are very similar configurations, but when running the same custom in-house application, the performance numbers are substantially different. Here are the server specs ...
0
votes
1answer
550 views

Tomcat performing terribly for no apparent reason

We're running a game application .WAR on Tomcat 6 on an Amazon EC2 server, 8 core processor, 7gb RAM. The application uses a MySQL database hosted on Amazon RDS. This Facebook application takes ages ...
-1
votes
2answers
72 views

Multi-CPU server with CPUs of differing core counts

Is it possible to have a multi-CPU server where the CPUs do not necessarily have the same number of core counts? For example, a group of 4 at dual core and a group of four at quad core? This ...
-1
votes
1answer
131 views

Can I improve speed in Hyper-V?

I use Windows Server 2008 R2 (it is host) with Hyper-V and a guest running Ubuntu 12.04 LTC. It is my settings: RAM 32768 Cores (virtual processes) 4. (I need 12) I also use virtual hard drive ...
-1
votes
1answer
30 views

Tracking down high CPU core utilisation

I have a system with 24 cores and for some reason only the first core is at 100% utilisation while the others are in the range of 20-25%. I would like to get all processes that are running on the ...
-1
votes
1answer
143 views

How strongly does the number of processors influence on the performance? [closed]

I use Windows Server 2008 R2 with Hyper-V. I can increase the number of processors in Hyper-V settings (http://www.youtube.com/watch?v=NQCMT-O6bMM). How strongly it will increase the performance? ...
-1
votes
0answers
277 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 ...
-3
votes
3answers
384 views

Why do I need six cores in a cpu for a server? [closed]

I was getting specs for dell server and one cpu is an Intel Xeon with 6 cores, another 4 cores. What am I getting with this? Do I need six cores? What does that give me? I don't know what ...
-4
votes
1answer
130 views

Hyperthreading can only create two threads? [closed]

HyperThreading can only create two cores/threads ? More can not be created by design or is there any other limitation ?
-4
votes
2answers
188 views

Windows 2003 Server and Core2Duo processor features [closed]

I use my computer for development (ASP.NET 4.0/MS SQL Server 2008). I want to install Windows 2003 Server. But I want to know does Windows 2003 Server recognizes and utilizes full features of Core2Duo ...