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1answer
550 views

How to combine different pidstat outputs (CPU, I/O, Disk Usage)

I would like to use pidstat to get both -u, -r and -d flags. Is there a way to do so? The idea, is to get both CPU, I/O and disk usage. Cheers Ps. Combining the flags as -urd doesn't work in Ubuntu ...
4
votes
4answers
6k views

How can I investigate sustained high CPU usage by Microsoft.Exchange.Rpc.ClientAccess.Service.exe?

One CAS server in our array has nearly 90% of its 4 CPUs used. The remaining CAS servers are at 30 percent. How should I investigate what is causing this increase? Below is a graph of: Six ...
1
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1answer
416 views

Is there any way that I can control the CPU resources sharing among Xen virtual machines?

I'm going to set up three or two Xen virtual machines on one physical machine. I want those VMs to share different CPU time on average. I've Googled for a long while but still haven't been able to ...
0
votes
1answer
4k views

High CPU load on QNAP TS-659

We have a QNAP TS-659 Pro+ Turbo NAS in our office. Its hardware/software is: 6x SATA II HDD (total 4.5 TB) Intel Atom D525 1.8GHz 1GB DDR2 Firmware - 3.5.2 Build 1126T (latest available) Linux ...
0
votes
1answer
2k views

kblockd and kjournald high cpu

I have a server that has 5 GB Ram and 3k MHz quad core CPU. It runs CENTOS 5 and usually worked ok. For a month or so I've been having problems with it, the load average raises above 4 and parts of it ...
6
votes
2answers
802 views

Prioritise ssh logins (nice)

Is there a preferred way to set "nice" for sshd? I need priority given to sshd such that I can login and easily fix stuff when something has gone wrong (eg DoS, badly behaved processes, etc)
4
votes
1answer
571 views

How does a CPU ever go Idle enough to enter deeper C states?

Even if no user process is running, don't the kernel processes keep the CPU active enough so as to prevent it from entering a deeper C state like C1 or C2 ?
0
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3answers
680 views

Mysql full text search cause high usage CPU

We built a news site. Every day we will input tens of thousands data from web api. In order to provide a precision search service, our table use MyISAM, build fulltext index (title, content, date). ...
1
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1answer
268 views

random high cpu load on linux box

It was all working fine couple of days ago (never jumped above 3.0). But now, the load average for 1 minute jumps well above 10, may hit 20, and then goes back to 5-6, maybe 3. The htop shows me ...
1
vote
1answer
151 views

CPU spec for VPS hosting

I'm looking at various VPS hosting providers, and I notice that while many of them will give you the spec of the VPS in terms of how much RAM, hard disk space and bandwidth you will be provided, very ...
9
votes
3answers
3k views

Why is my router CPU at 40% when no processes use more than 2%?

I have a problem, I have a Cisco 1841 running Cisco IOS 15, and I get strange behavior. The CPU usage is shown as 40%, but there is no processes that is using this much CPU power. Here is an ...
1
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2answers
1k views

Increase an Ubuntu Server CPU number on VmWare ESXi

Can I increase the number of processors dedicated to my Ubuntu Server 10.04 virtual machine without creating problems to its functions? It will be accepted without hassle or I should do something at ...
2
votes
8answers
2k views

cpu utilization over 100% in linux system

In one of our production Linux servers, CPU utilization is crossing 100 % and sometimes it is 250%. How can I find which process is using more CPU utilization and where can I find CPU utilization ...
4
votes
4answers
2k views

CentOS - High CPU Usage at a particular time in the night

I have a CentOS-5 server that has very little load. A typical output of "sar" command shows like this: 02:20:01 PM CPU %user %nice %system %iowait %steal %idle 02:30:01 PM ...
0
votes
1answer
669 views

SAR statistics on CPU usage

i have Ubuntu server with 2 processors. top command show that mysql eats up to 195%. sar shows the following: 08:30:59 AM CPU %user %nice %system %iowait %steal %idle 08:31:00 ...
0
votes
1answer
241 views

How to calculate CPU utilization of a host that VM can take before deployment based on the VM template information?

I am trying to figure out based on the VM template information like NAME = vm-example CPU = 2 MEMORY = 1024 DISK = [ type = swap, size = 2048, readonly = "no" ] How can I calculate ...
1
vote
1answer
363 views

Mysterious per-session CPU limiting?

TL;DR: CPU-hungry processes are sharing cores on a multi-core server while other cores sit idle, whereas I expect the Linux scheduler to distribute jobs evenly across cores. What could cause this ...
-1
votes
1answer
339 views

Cpu usage from top command

How can i get the result like example following. Any command or scripts? Snapshot u1234 3971 1.9 0.0 0 0 ? Z 20:00 0:00 [php] <defunct> u1234 4243 3.8 0.2 64128 43064 ? D 20:00 0:00 ...
3
votes
2answers
633 views

Can an ESX server under heavy load cause cpu spikes on guest VM's?

So we have a number of vm's running on an ESX 4.1 server for product testing. The ESX Server is at times under heavy load. We've been experiencing high CPU levels during some use cases, but we can't ...
1
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2answers
2k views

/lib/udev/net.agent causing high CPU usage

We have a number of Soekris boxes running Debian Squeeze. They were installed through an automated process consisting of using deboostrap and copying it unto a Compact Flash card. We use puppet to ...
0
votes
1answer
531 views

How do I troubleshoot high vmstat sy

I have a Solaris server with very high vmstat sy time. What tools can I use to identify which process is causing the high system cpu usage? kthr memory page disk ...
3
votes
1answer
343 views

Getting CPU steal times on Ubuntu 11.4 Virtual Box

I'm trying to check on CPU steal times in a virtual machine. The goal is for me to be able to detect if my app is running in a VM on over-committed hardware. I'm currently just testing, in ...
0
votes
3answers
815 views

How to know what is consuming the CPU on my Ubuntu Lucid server running in Linode instace?

I've a Lucid 10.04 instance running on Linode which is hosting a simple rails3 app. Now I'm getting several email complaining the CPU usage almost 100%. But I'm not being able to figure out what is ...
1
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4answers
1k views

Ok to disable DNS Client Service on Windows 2008 Web Server due to high cpu usage?

Occasionally on one of my web servers the svchost.exe runs around 60-80% running the DNS Client Service. This is on a Windows 2008 Web Server machine (patched up all the way) handling around 10M page ...
1
vote
1answer
504 views

400% CPU usage for MySQL? What? What should I do?

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 19857 mysql 20 0 514m 47m 3404 S 386 9.7 4511:45 mysqld 15659 www-data 20 0 205m 11m 4856 S 7 2.3 0:00.67 ...
0
votes
2answers
217 views

Citrix XenApp slowness on ESX 4

I need some help with a some CPU constraint issues( i think) diagnosis. I have a client with a Citrix Xenapp farm (5 desktop servers/9 Application servers) spread accross 12 ESX hosts running ESX4.0. ...
1
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2answers
405 views

SLES guest on HyperV: high CPU usage vs. accurate time keeping

Here is the issue: SLES 10 SP1 guest is running on HyperV. I need accurate timekeeping on this box, so I have applied these kernel parameters (which were proven to work on other identical SLES 10 SP1 ...
0
votes
1answer
2k views

Total CPU Utilization of a Server

How to find total CPU utilization of a server using SNMP ? I am trying to find the CPU utilization % of one server having 64 CPU's ? Thanks.
2
votes
2answers
655 views

What is the OID address for getting the CPU loading & physical RAM usage in WinXPsp3 & WinServer2003r2sp2 via SNMP?

I am trying to use snmp to get the usage of CPU & physical RAM from remote PC (WinXPsp3 & WinServer2003r2sp2), after google many hours I did not find any exactly OID address for them. I have ...
1
vote
2answers
132 views

Scaling Python CGI scripts [closed]

I have Apache running on a quad-core Ubuntu server on a 384kbps ADSL. Files are uploaded by users via a web-form and processed by various Python programs running as CGI scripts. Some scripts are CPU ...
0
votes
1answer
151 views

100% Hardware IRQ while PHP just seems to hang for a second

I'm running the FLOW3 Quickstart on a Fedora machine (virtualized on Windows, if that helps). Each and every single request takes about 1.2 seconds to run the most simple example of this framework. I ...
2
votes
2answers
156 views

What does this command do on Linux? It is eating my CPU.

I have a VPS and I am hosting a game site on it. Recently my CPU went to 3000% and memory is going near full. When I checked the processes I found this process eating the CPU: Pid-1571 (Trace) ...
0
votes
0answers
73 views

websites running at high cpu loads and hangs up

I have few websites published on a server. 2 of them are running at very high cpu loads and hags up while running on a particular page. Works fine on local machine its just on one server they are ...
3
votes
2answers
2k views

Java eats %100 cpu up

I got this CentOS server in which a Java WebApp (Tomcat6+Hibernate+MySQL+Struts2) is being run. Usually cpu usage is about 10% but sometimes all of a sudden it goes to 100% and the application ...
1
vote
1answer
659 views

top command indicates a different cpu usage than sar command

In my CentOS server, when I check the resources with sar command, user cpu usage is around %15 while in top command the sole 'java' process uses like %99 of cpu. sometimes it's even goes further than ...
1
vote
2answers
278 views

Making processes lower priority. Niceness isn't seeming to cut it

I run a game server. Every 12 hours or so we have to generate a map of the server for our website. The process takes about 20 minutes and burns the CPU hard the entire time, which lags my game server. ...
0
votes
3answers
110 views

CPU usage messuring?

I have a Windows 2003 cloud server and I did like to checkout the current usage of cpu and memory of 2 applications I have currently running but I am not sure of what would be the right tools to check ...
0
votes
2answers
220 views

How many cpus needed to check a 100 million digit prime number efficiently?

If I had access to potentially large number of CPUs and wanted to quickly check 100 million digit numbers for primality using a map-reduce architecture, how many CPUs would be necessary? Each of the ...
0
votes
1answer
348 views

Scalability problem (Tornado). Can't figure it out, holding up launch

Thanks guys, any ideas/insight are appreciated b/c this is driving me crazy. Problem: Only about 3 or 4 users can use the server simultaneously before app grinds to a halt. Currently we see massive ...
3
votes
1answer
367 views

Truecrypt - disk stops reading/writing with regular intervals (Ubuntu)

I am running Ubuntu Lucid with a raid0 setup Intel Xeon X3440 - 4x (2x 2.9GHz) 16GB RAM I got a 1.9TB truecrypt7.0 file container with AES located in my /home (where raid is). When testing ...
2
votes
1answer
277 views

SQL Server 2000 HIGH CPU Usage with BusinessObjects reports (unsolvable?)

I have one of those weird questions, those ones that are nearly unsolvable (the only way to really solve them is to throw out the technology and buy new ones). I've had a number of experts (about 10 ...
0
votes
1answer
186 views

CPU & Memory Usage Log & Performance

I want to have an idea of the amount of CPU and memory that is being used. I have a website hosted using IIS, and have clients connecting to it. I want to find out the amount of load that the CPU, RAM ...
3
votes
1answer
4k views

Erratic CPU usage by mscorsvw.exe (.NET Runtime Optimisation Service)

I have a Server 2008 R2 Terminal Server that's just been kinda sitting around for the last three months with very, very low usage (perhaps 1 user for an hour, once a day). All of a sudden, for no ...
2
votes
1answer
532 views

Passenger - “Auto-kill” rogue processes?

I'm running a Ruby on Rails application with Passenger + Apache. There's also a perl mailing list server (Sympa) running with mod_perl. I have root and sh access to the server (an Ubuntu machine). ...
1
vote
1answer
217 views

Java doesn't seem to utilize more than two cpus

In my current setup (debian squeeze x64, 6 cpus) neither java nor apache seem to utilitze the full potential of the server. The munin monitoring shows cpu usage never exceeds the 200% mark. We ran ...
1
vote
1answer
320 views

Is it normal for CPU Usage and System Idle Process not to match?

This is on (an old) single-core a Win2003 box. I noticed that, under Task Manager>Performance, CPU usage was topping out at 80% but under Processes the Idle process is showing around 60-70%, with ...
2
votes
2answers
4k views

High “System” process cpu usage on windows server 2008 r2

Our setup is VMWare Esxi system, running on a dual quad core server with 32gb of RAM. It has 4 VM's running on it, and one of them, our file server, ie experiencing high cpu usage for the 'system' ...
0
votes
2answers
905 views

bash script while true + sleep 24 hours + single command VS Cron

Is it a good practice to have a bash script in a VPS with the following skeleton: #!/bin/bash while true; do /path/to/other-bash-script-that-does-stuff.sh sleep 24h done This is to avoid ...
1
vote
1answer
740 views

CPU is very spikey and erratic, network latency. Windows Server 2003

Something is making my server go crazy. First it was just the network had some bad latency, then I noticed it was on the server, not the network. I thought it to be HDD related but I am not sure. It ...
0
votes
1answer
184 views

Windows 2000 Domain Controller CPU running at 100%

We are running a Windows 2000 Server as a domain controller and file server. 2 weeks ago, the machine was running fine. Then, after a power-outage and a restart, the machine became sluggish and ...