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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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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141 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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2answers
73 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 ...
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2answers
79 views

When upgrading hardware to increase program performance, which should I consider first CPU, RAM or both? [duplicate]

I have a simple script that I wrote in PHP (which, after reading lots of QAs seems to have less than desirable memory management). It's an extremely small script that loops through configuration ...
3
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1answer
531 views

CPU Sockets vs. Cores

We are looking at software that is licensed by socket. Right now our hypervisor (EXSi) underutilizes the 2 socket 8 core processing power it has. Most guests only have 4 virtual cores. In order be ...
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1answer
393 views

Two CPU cores at 100% utilization after soft lockup on two CPUs, is this normal?

I had two of my CPUs lock up on one of my servers. From dmesg: BUG: soft lockup - CPU#1 stuck for 23s! [vmx-vcpu-0:6148] and later: BUG: soft lockup - CPU#2 stuck for 23s! [vmx-vcpu-0:6148] I'm ...
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1answer
105 views

CPU overload on a VPS (Cloud) - overusing resources, how would DC/Host react? [closed]

I got a couple of VPS from DigitalOcean. Each of these VPS got one core. I'm running some script for data mining. I often happen to use one core of my CPU in the range of 1.0 - 1.5 apparently, it ...
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1answer
575 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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4answers
4k views

How can I troubleshoot high Kernel time?

I have unusually high Kernel time on my CPUs as shown in task manager. What are some ways I can troubleshoot this?
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1answer
3k views

GlusterFs - high load 90-107% CPU

I try and try and try to performance and fix problem with gluster, i try all. I served on gluster webpages, php files, images etc. I have problem after update from 3.3.0 to 3.3.1. I try 3.4 when i ...
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2answers
199 views

Is this a 2 or 4 CPU Configuration? [closed]

I'm looking at this server configuration (I'm reviewing a customer's potential order for a server for our software) and I'm trying to understand what kind of CPUs would come on the server. HP SB Gen8 ...
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0answers
132 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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1answer
182 views

IBM Blade HS21 Processor Compatibility

Can anyone tell me of a resource where I can find out specifically which IBM HS21 blades support which processors. In particular I have Intel 2X E5420 and Intel 2X E5450 which will work in some of my ...
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1answer
64 views

Server goes to 100% and stays there, how can I investigate this? [duplicate]

I have a problem. I am on a Xen VPN, running CentOS 6 and Apache. I have a medium traffic Zen Cart store and a few low traffic wordpresses. I have one or two very simple PHP form submission scripts, ...
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2answers
196 views

How do power consumption and size-of-smallest-feature matter when buying a processor? [closed]

Background: I am shopping for processors to build a server on Newegg. The first bullet point on each processor displays the size of the chip in nm and its wattage. Why? I am looking at the number ...
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0answers
54 views

High load cause? [duplicate]

Possible Duplicate: what is my server high load cause (4 cores and 8 thread cpu) What is my high load cause? CPU,RAM or IO? 4 Core, 8 thread cpu top - 22:27:07 up 149 days, 5:26, 1 ...
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1answer
146 views

Replacing a loud fan in a 1RU server

I just bought a firewall that is very loud. The biggest problem is the two fans in the back (2 x Sunon 40mm fans) running at full speed. The firewall is 1RU with pfSense installed on it.The CPU is a ...
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1answer
170 views

*tiny* SOHO fileserver upgrade recommendations in 2012? [closed]

I say 2012 as we'll likely be buying last year's hardware. We're non-profit (a two-man operation), and this purchase isn't on project funding, so we're cost-restricted, but I always advocate for ...
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1answer
416 views

BIOS System Firmware failed

One of my company's servers won't boot. Both CPUs' error LEDs are lit. The iRMC interface shows the following errors: CPU 1 failed CPU 2 failed BIOS System Firmware (BIOS/EFI) failed All other ...
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0answers
548 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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2answers
204 views

What is the best way to get ubuntu webserver cpu and memory load chart? [duplicate]

Possible Duplicate: What tool do you use to monitor your servers? I have a simple ubuntu 12.04 server that runs nginx, gunicorn and some python WSGI websites. Every morning i want to see ...
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2answers
834 views

Laggy server, seems iptables is doing the load

I added a few thousand IPs packed in multiple /24 classes to a CentOS box and because of that I am getting scanned day and night. Since this server will be a workhorse and it will only need to be ...
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0answers
109 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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1answer
3k views

How to make Windows 2008 R2 see 4 CPU cores, with two single core processors , Hyperthreading enabled

I had server with old Xeon DP and Windows 2008 R2 , With hyperthreading enabled OS saw 2 CPU cores. Recently I've added second same Xeon DP , but OS steel sees 2 CPU cores. I did uninstall all cpu's ...
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0answers
195 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 ...
6
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1answer
991 views

KVM/Qemu, Ubuntu: Why do more guests CPUs enhance Disk-I/O rapidly?

We have an Heartbeat/DRBD/Pacemaker/KVM/Qemu/libvirt cluster consisting of two nodes. Each node runs Ubuntu 12.04 64 Bit with the following packages/versions: Kernel 3.2.0-32-generic #51-Ubuntu SMP ...
6
votes
4answers
956 views

using i7 “gamer” cpu in a HPC cluster

I'm running WRF weather model. That's a ram intensive, highly parallel application. I need to build a HPC cluster for that. I use 10GB infiniband interconnect. WRF doesn't depends of core count, but ...
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3answers
299 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, ...
3
votes
1answer
2k views

Strange high CPU I/O wait on postgresql server

I'm really struggling with a performance issue currently, where all my database queries takes up to a 1000 times more than normally, when my database server is under "heavy" load. I have a server ...
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1answer
68 views

Can i boot the server [closed]

Hello and good day. I have a ml350 g4 and i have these questions: I dont have the cpu-fan & heatsink does it need that to boot? Does it need the chassis fan to boot? What ram does it need? ...
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1answer
1k views

How to limit excessive CPU usage from guest OS in KVM

On Xen it is easy as we have CreditScheduler [1], so on a machine with each guest OS sharing only portion of CPU, e.g. 6 guests running on top of a dual core CPU, excessive CPU usage is prohibited. ...
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1answer
578 views

Monitoring usage resources per user in Linux

I want to get statistic hourly by used averages resources per user such as cpu and memory. How I can get it?
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1answer
796 views

High CPU Usage in windows server 2003

In one of our production servers the CPU usage is 100% and thus some of the backup jobs failed. In windows server 2003 cms.exe shows : 50%, tomcat_3.exe : 25%, and tomcat_1.exe : 25%. Please help me ...
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1answer
661 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 + ...
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1answer
96 views

4 CPUs - 2 on 100% 2 on 30% - How do I even the load out?

When running a job on a SQL Server 2008, I notice that 2 CPUs are running at 100% but 2 are only about 30%. How can I spread the load and will it reduce the duration of the job which currently takes ...
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3answers
3k views

Balancing RAM when using multiple CPUs

We have HP DL360 G7 server with one cpu and 16G 12G ram. We plan to add another cpu. So, we need also ram for second cpu. Is there any negative performance impact if we add different size of ram to ...
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2answers
10k views

How do I determine what taskhost.exe is doing?

Once or twice a week taskhost.exe slows my computer to a halt! It takes up 25% of my CPU power (ie. 1 processor). I can't kill it an have no idea what it is doing. I imagine that its some kind of ...
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2answers
150 views

CPU Cooling with Heatsinks [closed]

I've constructed a server that uses 2 Xeon E5-2620 CPUs and per Intel's recommendation I'm in the process of ordering heatsinks for each and I'm slightly concerned about thermal management. The case ...
3
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1answer
3k views

Disabling CPU management

If I add the following processor.max_cstate=0 to the kernel command line for boot up, does that disable all CPU power management and throttling? I also found: ...
2
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1answer
389 views

Load average relation to cpu threads and cpu cores

Is load average related to CPU ThreadS OR CPU core? i am having a xenon cpu with 8 cores and 16 threads. How much can be the acceptable load average? Sometimes Load AVerage reaches 11. so does ...
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1answer
218 views

Maximum CPU and hyperthreading [closed]

Hyperthreading doubles the logical cores, but doesn't double CPU resources. Linux measure CPU usage in %, allocating 100% points for each thread, thus reporting a maximum of 800% for a quad-core CPU ...
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1answer
330 views

HIGH CPU USAGE + low memory usage

As you can see in below, Apache is using a high amount of CPU. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 28577 apache 15 0 99676 53m 3488 S 21 0.2 1:13.67 httpd ...
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votes
2answers
3k views

How to calculate CPU % based on raw CPU ticks in SNMP

According to http://net-snmp.sourceforge.net/docs/mibs/ucdavis.html#scalar_notcurrent ssCpuUser, ssCpuSystem, ssCpuIdle, etc are deprecated in favor of the raw variants (ssCpuRawUser, etc). The ...
4
votes
3answers
7k views

What is the meaning of “deassert” in this context?

The English majors over at Dell provided me with this error message provided by a PowerEdge 2950. CPU2 Status: Processor sensors for CPU2, IERR was deasserted I've Googled it, random forum posts ...
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2answers
380 views

What is cpuinfo telling me?

On my current server, when I do cat /proc/cpuinfo, I get: E3-1230 @ 3.2ghz / 1600mhz and there are 8 of these. Does this mean there are 2x quad core processors? I've looked everywhere and I'm not ...
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2answers
1k views

Coreinfo reports i7-3770 CPU doesn't support EPT (aka SLAT) and VMX

Here is the output I get when I run coreinfo: Coreinfo v3.05 - Dump information on system CPU and memory topology Copyright (C) 2008-2012 Mark Russinovich Sysinternals - www.sysinternals.com Note: ...
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2answers
275 views

find the cpu usage of a process on Ubuntu?

Is there a way to find the CPU usage of a process on ubuntu combined with the cpu usage of all the child process. And also would it be possible to get this number as a % of the total CPU usage?
0
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1answer
193 views

Why no Ivy Bridge servers? [closed]

It seems that Intel released server versions of their Ivy Bridge chips in May of 2012. It's now October of 2012, why can't I buy a server with an Ivy Bridge chip? When might I be able to?
2
votes
2answers
356 views

Monitor CPU usage over period of time on Ubuntu

Is there some way to monitor my CPU usage over a period of time, e.g. get a graph that shows CPU% vs. date/time? I occasionally see high load using htop, but I'd like to see what's happening ...
4
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3answers
568 views

Is it possible to get a list of running processes with a Cloudwatch Alarm?

We have an EC2 instance (Ubuntu) that has a few java-based applications and lately we're getting hit with high CPU utilization spikes that trigger one of our Cloudwatch alarms. By the time we get ...