The amount of processing units of the CPU used to execute a task and how long it takes.

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0answers
14 views

server capabilities for 2000 active users [duplicate]

I have a CentOS 7 with Apache2 and a Drupal application with a MariaDB database. The application must be available for 2000 users and sometimes about 1800 users will be using it simultaneously. I was ...
1
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0answers
6 views

Is there a way to check resource utilization on a cluster running SLURM?

Not sure if this question fits better here or at Unix.SE but I figured it feels more appropriate here. I am running some computation-heavy research on a national cluster which uses SLURM for ...
3
votes
2answers
58 views

How to compare mainframe CPU performance?

I am working with an application that runs on tomcat in OMVS. It run terribly on one mainframe, and adequately another another. Is there a way I can compare the CPU of the two mainframes as a ...
0
votes
0answers
16 views

Task Manager shows high kernel time

Foreward: Hardware: dual-socket Intel Xeon, 128gb memory, hardware RAID-1 SSD OS: Windows 2012 R2 Standard w/ Remote Desktop Services The Task Manager for one of our terminal/application servers ...
0
votes
2answers
106 views

How to troubleshoot high load caused by php7

We upgraded to php7 (this was only change in server), this is causing high load on CPU. Cacti graph sar output 04:40:01 AM CPU %user %nice %system %iowait %steal %idle ...
1
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1answer
34 views

Why does kswapd use 100% CPU with no swap space and plenty of cache available for reaping?

Firefox used a lot of memory and the machine ground to a near-halt with kswapd/kworker using most of the CPUs. There is no swap space, and vm.swappiness=0 on Linux 4.5.7 (Fedora 24). What I don't ...
20
votes
4answers
30k 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
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1answer
65 views

Attempting to block “wordpress” useragent is overloading CPU [duplicate]

I've had some DDoS issues - specifically the XML-RPC exploit (wordpress) wherein thousands on thousands of Wordpress instances attack my machine. I have the following in my nginx server block: ...
0
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1answer
18 views

Large CPU spike for proc (www-data)

I am trying to understand what is causing these routine high CPU loads on my server. The server is using serverpilot on a small Digital Ocean Droplet which comfortable runs a few wordpress sites ...
0
votes
1answer
46 views

How to diagnose process at 100% CPU without being able to shell in?

Given an Ubuntu 14.04 server setup on a popular VPS provider hosting a single website with Nginx, Apache and WordPress / PHP, after starting the server it works fine for a while. Days later the VPS ...
1
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1answer
32 views

t2.micro instance is always below baseline CPU usage but still consumes CPU credits - why?

I have a t2.micro instance running Ubuntu Linux on ec2 in Ireland, it's running batch jobs and I've tuned them so that the max CPU is pretty low - it never exceeds 10%. The docs say that: When a ...
1
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1answer
465 views

How to assign dedicated vCPUs to specific VM on Proxmox (KVM) or what system could do that?

I'm posting this here, because what I've found about the topic is either outdated, incomplete or not suitable for various reasons. I have wanted for a long time to learn how to map specific vCPUs to ...
0
votes
1answer
45 views

Can high server's CPU usage cause high ping for clients? [closed]

Some users have high ping and they cannot play my multiplayer game due to it. My server application is causing CPU to always rise little by little and when I restart it, it drops. I am working on ...
0
votes
0answers
20 views

CPU usage plot in graphana

I am trying to plot CPU usage in Graphana. Collectd gives metric to InfluxDB and I get metric from Influxdb into Graphana. I have tried taking derivative of last value but CPU is in negative. I want ...
-1
votes
1answer
47 views

LAMP Server 100% CPU Usage from 5 WP sites [closed]

I have a server hosted in Google Cloud configured to serve websites on the LAMP stack. Current, all of these websites are WordPress-based, of which there are only 5. I have an n1-standard-1 server so ...
2
votes
3answers
51 views

How can I keep a third-party cloud provider accountable for guest VM performance?

I support an ERP system for a manufacturer. We're experiencing intermittent application performance issues on our database, hosted on VMware by a third-party cloud provider. (They're a smaller ...
0
votes
1answer
177 views

High CPU Load on Synology by smbd

I have a Synology DS213j which I access through a VPN via the build-in VPN Server (I use OpenVPN) using Windows Explorer. Copying files to my local hard drive is very slow in the range of only ~170 ...
0
votes
0answers
407 views

Debian Jessie 8 idle on fresh install always a little too high, shows rcu_sched ksoftirqd kworker causing cpu load

Are the days of 0.0 cpu load on an "idle" server gone? I have another server (centos/redhat) 32GB ram that actually runs apache/MySQL/Lamp, mono, redmine/ruby, and other junk and its still shows me 0....
1
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0answers
35 views

What's the impact of a high cpu steal time on XenServer's dom0?

From what I understand, cpu steal time is the CPU time that the VM kernel requested, but was denied by the hypervisor because it was serving another VM. From my experience, on a XenServer that has ...
0
votes
1answer
59 views

%CPU at 99% when cronjob runs php script every minute

I am using a debian server and for some reason when I run this php script using crontab every minute it says that I am using 99% of the %CPU with the php command (in the cronjob the command is php) ...
12
votes
5answers
42k views

TrustedInstaller.exe takes a lot of CPU

Does anyone know how to fix issue with TrustedInstaller.exe when it takes a lot of CPU? Operating system: Windows 2008 x64 Windows' Modules Installer service is set to Manual.
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votes
1answer
57 views

number of cores available on a server

I need to find out, how many cores are available on a server at that moment. For example, it is a 8 core machine and running at 50% CPU utilization. Can this be assumed as 4 cores are available? or is ...
4
votes
0answers
48 views

What process on a SonicWall Security Appliance Checks the DPI-SSL Client Inspection?

I'm interested in determining if there is high CPU usage on a SonicWall Security Appliance, but I don't know which process to check for high CPU usage. There are various options for this in the UI ...
0
votes
0answers
25 views

Definition of CPU Ready for vmware ESXi host compared to CPU Ready for a guest?

We had a guest with poor performance. CPU Usage and CPU Ready for the guest was within normal range. For the host the CPU Usage were normal (70%), but the CPU Ready for the host seems to correlate ...
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votes
1answer
99 views

High CPU being caused by garbage collection in w3wp.exe [closed]

I am having a problem with High CPU happening on my my website in IIS8. This happens randomly and not very often but it does happen especially when the load is heavy on the site. The only way to ...
0
votes
1answer
29 views

php-cgi.exe CPU load jumps after MySQL Backup

I'm running Windows 2012r2 on a new server, with Plesk 12.5 and MySQL 5.6 installed. There's a backup script which takes a DB dump and zips website data files that runs each day. However, it brings ...
5
votes
0answers
55 views

Right way of measuring overlay network performance

I am currently examining the performance (especially UDP throughput) of different Docker overlay networks. I do this by creating point-to-point connections between two hosts that are connected with a ...
0
votes
1answer
42 views

Handling highly CPU intensive process on server

I have a Windows server machine on Amazon EC2 (m4.2xlarge) which handles web requests, does some processing using an app A and returns the results. Problem is, this app A is highly CPU intensive and ...
2
votes
1answer
76 views

Why might 'mpstat' and 'pidstat' disagree about CPU load levels?

I'm monitoring a mysql process in ubuntu 12.04 using mpstat and pidstat, simultaneously. While debugging its CPU usage, I noticed something unusual. While both tools agree that CPU load is occurring, ...
0
votes
1answer
45 views

Windows server 2008 R2(standard) client connection is very slow after connecting above 24 client machines? Is there any client connection limit?

Windows server 2008 r2 standard is connecting 24 cilent machines after while adding extra machines to server it gets slow. In Windows server 2008 r2 maintaining the mysql database and all other client ...
1
vote
1answer
100 views

CPU frequency governor for virtualized guest in VMware

CPU frequency governor can scale the CPU frequency up or down in order to save resources. In a physical server usually have sense, but I don't know if this is applicable for a virtual guest running ...
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votes
2answers
83 views

Java process stay in running state and consume CPU

I have a jar running in background on a Ubuntu server. In a certain moment, the application start consumming too much CPU (400%) and 4 child process stay in R state: N.B: the problem is ...
22
votes
4answers
9k views

“Peaky” CPU Usage on Domain Controllers

We have two Windows Server 2008 SP2 (sadly not 2008 R2) Domain Controllers in a small 150 client domain that are exhibiting very "peaky" CPU usage. The Domain Controllers both exhibit the same ...
0
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0answers
24 views

Increase Memory and downgrade CPU on RAC 11.2.0.4 with 2 nodes

I have a RAC 11.2.0.4 on Linux x86 with 2 nodes with 3 databases with a total of 300GB(SGA and PGA) among all. What if a node has 512 of RAM and another node has 1 TB of RAM? What if one node has 2 ...
1
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4answers
84 views

10 min. bursts of CPU usage: how can I find out which processes are the cause?

The CPU usage graph above was generated by running psensor overnight on my linux box. Note the 10 minute bursts of activity consuming up to 40% of the Xeon. The machine ought to have been at idle ...
7
votes
1answer
10k views

How can a Perfmon “% Processor Time” counter be over 100%?

The counter, Process(sqlservr)\% Processor Time, is hovering around 300% on one of my database servers. This counter reflects the percent of total time SQL Server spent running on CPU (user mode + ...
0
votes
1answer
618 views

Webserver max CPU when apache and MYSQL are ran together

This website has been running fine without issues, Recently it went down. After some investigation it looks like the combo of MYSQL and Apache bring the box to its knees. Apache can run find serving ...
0
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0answers
39 views

Apache strace getsockname call is slow

While load testing I am getting almost 100% CPU usage by Apache processes. To find out the root cause I attached Apache process with strace and found slow calls. 11840 0.000063 accept4(3, {...
0
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0answers
156 views

Apache is using 100% CPU even with one user

Apache is using 100% CPU even with one user Apache (or should I say PHP through Apache?) is using 100% CPU for few seconds every time somebody search bugs at our bug tracker or just reload the search ...
5
votes
3answers
4k views

kswapd often uses 100% CPU when swap is in use

Most of the time when my computer starts to need swap, I see a massive spike in CPU usage (kswapd0 is consistently using 99%-100% CPU). According to top, the time is spent in sy (system/kernel) not wa ...
0
votes
1answer
165 views

Unusually large number of httpd processes and high CPU load on MongoDB replica set members

I am investigating a strange behavior on 3 CentOS machines serving as a MongoDB replica set, whereas one of them is also hosting a PHP web app utilizing the MongoDB replica set. The basic setup is as ...
0
votes
1answer
117 views

high mysql CPU usage more than %1500 on centos 6

I am running a high traffic websites on a Dedicated-Virtual 24GB RAM CentOS server hosted by the planet. Very often the server dies because of high CPU usage (%1500) When i check the running ...
3
votes
1answer
184 views

How to find what processes were running at a time in the past?

I am asked to investigate a high CPU usage alert which occurred this morning. I used sar -p and saw the high CPU usage showing up at that time Next I used ps -eo pcpu,pid,user,args | sort -r -k1 | ...
0
votes
1answer
80 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 ...
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votes
1answer
87 views

Windows Server vs Ubuntu base CPU usage for AWS EC2 burstable instances [closed]

I recently switched from a small VPS provider to AWS EC2. My traffic usually comes in bursts throughout the day and I therefore concluded that running multiple t2.micro instances would be by far the ...
1
vote
2answers
406 views

Load high with very little CPU usage?

The load has been sitting at around 6 but there is very little running on the box. Any ideas what's causing this? It's a large AWS instance. procs -----------memory---------- ---swap-- -----io---- ...
0
votes
2answers
65 views

No cpufreq sub-directory in one of the nodes in our cluster

How do you change the governor from Ondemand to something else ?
2
votes
1answer
4k views

iexplorer.exe high CPU/RAM usage

My client has a virtual Server 2008 R2 terminal server running under ESXi 5.1. This server, which been in production for around 4 months, experiences intermittent slowness / non-responsiveness for ...
2
votes
4answers
5k views

Nagios - measuring Average CPU Load

I've been looking for some hours now for a plugin that will notify me if one of my server's CPU Load has been over 90% for the past 5 hours. No luck looking around the Nagios Exchange. Can anyone ...
0
votes
1answer
50 views

CPU Load on Virtual Machine

This picture shows the CPU Usage of a Debian 8 installation running on a Virtual Machine (VMWare ESXi). I'm wondering about two things here Why doesn't the usage sum up to 200% (the virtual machine ...