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18
votes
2answers
2k views

Is there a Windows equivalent of Unix 'CPU steal time'?

In order to assess performance monitoring accuracy on virtualization platforms, the CPU steal time has become an increasingly relevant metric - see EC2 monitoring: the case of stolen CPU for an ...
3
votes
3answers
589 views

Running bash script with php under lower priority or limit CPU

I have a bash script which runs a set of php scripts. When it runs it takes an hour and pegs the CPU at 95-99%. This causes our lamp stack (mainly the apache process) problems and our website on the ...
1
vote
1answer
207 views

Apache/PHP Elastic Beanstalk - Track Which Request is CPU Intensive

At certain seemingly random parts of the day, my CPU usage will spike up from ~10% on 1 m1.large to 70% on 4 large servers. This all happens within 20 minutes and stays this way for a few hours and ...
11
votes
4answers
11k views

Linux CPU usage and Process Execution History

Is there any way to see what process(es) caused the most CPU usage? I have AMAZON EC2 Linux which CPU utilization reaches 100 percent and make me to reboot the system. I cannot even login through SSH ...
0
votes
1answer
1k views

Please help me reduce high CPU load, Wordpress website

I have a dedicated server. Ever since I upgraded Wordpress to latest version from 2.8.4, I see very high CPU usage. Also I updated the plugins. I use wp super cache. Compression enabled, cache expires ...
1
vote
2answers
4k views

How much resources should backup tools be using? ( issues with clBackup )

My hosting provider makes backups of our servers using a tool called clBackup which pushes files over the network. Below is one ps output we took and reported to our provider: top - 10:06:24 up 25 ...
0
votes
1answer
335 views

Apache/Passenger and cpulimit

I run a ruby on rails site that processes email - the email is dumped directly into the web app via a POST from postfix. At times I can get a burst of email coming in causing a prolonged surge in ...
1
vote
2answers
1k views

php-fpm: very high server load

Since today my webserver (nginx + php-fpm + mysql on a VPS) is very slow. htop says: 1 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Tasks: 63 total, 13 running 2 ...
2
votes
3answers
274 views

What kind of Windows-based “process accounting” software is available?

Linux has pacct and kernel-based processing. What equivalents are available for Windows? I am aware (and use/recommend) of Process Explorer, but that only tracks real-time stats, with non-portable ...
3
votes
1answer
4k views

CPU Usage while running command in command line

I am looking for a way to output CPU usage percentage via the command line. I ran across this: wmic cpu get loadpercentage which gives me the desired percentage output however I want to test the CPU ...
2
votes
1answer
3k views

PHP processes run one at a time, always taking 100% of one core

We have seven websites written in PHP running on a Windows 2008 server with IIS 7.5. They are all very slow right now. When I look in Task Manager, I see around 10 php-cgi.exe processes, and they ...
3
votes
1answer
2k views

Amazon EC2: how to find out detailed CPU usage?

I am running several EC2 instances, and I want to know the exact work my CPU is doing. On "normal" machines I am doing this with munin and its CPU plugin which looks at the statistics provided by ...
0
votes
1answer
552 views

Munin: Graph not plotting one label

I have set up munin to monitor EC2 instances. Now my CPU usage graph (using the unmodified cpu plugin) looks like this: The problem is that the "iowait" parameter is returned correctly (see text ...
1
vote
1answer
576 views

Limit CPU usage by Apache processes

I know there is a nice mod called mod_loadavg, but it seems it doesn't work with Apache 2.2.22. Can you tell me what else should I use ?
12
votes
11answers
7k views

What creates CPU I/O wait but no disk operations?

I have CPU I/O wait steady around 50%, but when I run iostat 1 it shows little to no disk activity. What causes wait without iops? NOTE: There no NFS or FUSE filesystems here, but it is using Xen ...
3
votes
2answers
3k views

CPU load too high. How to investigate?

This is my "top" screen. Now it's 2.96. Sometimes it goes above 3! I've read that it's not good. How to investigate and fix it?
4
votes
3answers
5k views

Intermittent high CPU (100%) on production webserver

X-Post from StackOverflow: http://stackoverflow.com/questions/9465123/intermittent-high-cpu-100-on-production-webserver We have a web cluster with 3 web-servers, each with 24 cores & 24GB mem. ...
0
votes
1answer
558 views

Django/MySQL/Memcached for 10K user visitors

I'm currently using CentOS (512 RAM, Dual-core CPU) for my website. Here are the specs: Django 1.3.1 Python 2.7.2 Apache 2 with mod_wsgi 3.3 MySQL 5 (about 5,000 records) Memcached (120 MB for ...
2
votes
1answer
295 views

Can I restrict how many CPUs SQL Server 2005 uses?

I have a SQL Server 2005 instance running on a production server. CPU load is relatively low in part thanks to some recent improvements in the code. I'm trying to work out if I could safely reduce the ...
0
votes
2answers
656 views

Monitor memory and CPU usage per website

The Plesk panel associated with my Linux RHEL5 server reports the CPU, memory and disk space of the server in real time although it's not possible for me to find out which websites are consuming most ...
1
vote
1answer
649 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
7k 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
vote
1answer
435 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
1k 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
674 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
votes
3answers
788 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
vote
1answer
324 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
154 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
4k 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
vote
2answers
2k 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
767 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
258 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
428 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
385 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
719 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
vote
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
668 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
393 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
939 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 ...
2
votes
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 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
590 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
229 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
vote
2answers
433 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
703 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
150 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 ...