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Questions tagged [cpu-usage]

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

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1answer
1k views

cat /dev/zero | pv > /dev/null [closed]

cat /dev/zero | pv > /dev/null What exactly happens here and what determines the speed of this process. Even on low end hardware you get a couple of GB/s transfer speeds like this.
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2answers
213 views

Why there are so many “ss” process on my server (CentOS with nginx serving the web)?

There are about 500 concurrent users. It's because some famous people on social network repost a link. This happened before. And our server were performing good. But this time, the server is getting ...
0
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1answer
226 views

Redis has lots of clients

We have a problem with Redis in our server. first in PHP script we connected to Redis via tcp:127.0.0.1:6379 port for caching. in this case and with netstat -anp |grep 6379 |wc -l command we had ...
0
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0answers
367 views

Very Strange CPU Usage with PHP-FPM/MYSQL/NGINX

I have php-fpm 7.0.11 - with ioncube nginx 1.10.x mariadb 10.1 I'm using the PHP-FPM to static, I never had any problems with this. The High CPU usage occurred randomly, and now it's permanent. I ...
0
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0answers
453 views

gettimeofday causing high httpd cpu usage

Im running a php script with ioncube/zend. All Cores are at 100% and the system begins to accumulate load. All httpd processes are in R (reading status) and it looks like they are reading on ...
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1answer
145 views

Virtual machines and dual socket setups: minimizing need for CPU-to-CPU communication

I am planning to build a multi-OS workstation overseen by (probably) KVM, on which I will do a variety of tasks. Some of these tasks lend themselves to multithreading better than others, so I want to ...
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0answers
303 views

High CPU Usage and hard drive usage

We have a server running some OCR software. Currently it is pulling files from our network drive and processing them, then saving them to a different network drive. We are trying to come up with a ...
16
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1answer
106 views

How to start a program when CPU percent reaches X

I have been having very intermittent problems with an ASP.NET v 4.0 application happens maybe ever 4 days, what happens is the CPU will spike to 75% and sometimes is will run fine until the end of the ...
3
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1answer
1k views

Redis server high cpu debugging strategies

Recently, we have been noticing CPU spikes on our production environment caused by redis which can be seen below: To combat this issue, I have been restarting the redis server about twice a day :( ...
1
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1answer
106 views

CPU load too high after upgrade from 1.8 to 11.23.1

Feel free to shoot me down in case there is more data that i can provide. I have gone through some blogs on serverfault and other blogs and gathered as much info as I can. I want to track/fix cause ...
1
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0answers
432 views

Stabilize CPU Usage for KVM VM

I running here Ubuntu 16.04 as KVM Host. In a VM runs Windows with a time critical process (UDP Video Stream) Sometime when other process runs on the host, for a moment it influence the CPU usage ...
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0answers
341 views

Linux process CPU usage drops when strace attached

I am facing bizarre situation with one of daemon processes on RHEL 6 box. It has been showing high CPU usage in top putput, mostly in %sy space. However when I try to check which syscalls consume CPU ...
0
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1answer
811 views

SQL Server 2012 constant CPU load

I'm trying to diagnose an abnormal CPU usage of the sqlservr.exe process from a SQL Server 2012 Express installation. The installation is running in a VM with Windows Server 2012 R2, 8-core Xeon E5 ...
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1answer
122 views

Apache being hit by requests (cpu 100%)

recently we moved to a new host (DO) for one of my client after being on a shared account . I was monitoring the cpu and it was always at 100% , knowing that the site dosnt get a lot of traffic , ...
0
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2answers
102 views

Server CPU too high

Recently I have to restart my server because it was not responding. I'm looking at the logs but I can't find anything valuable to know which the error was. The droplet CPU was 100% for hours. Here is ...
0
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2answers
451 views

Monitoring snmp with Nagios

I'm using Nagios 4 and installed nagios plugins to. I wan't to monitor my HP switch CPU, MEM, etc via snmp, but I totally don't know how to do it. First of all, how do I get the right OID's and how to ...
0
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1answer
84 views

How to remove/clear 1000+ files with less CPU intensive cron

I have the following cron setup to clear the tmp folder: 0 0 * * * rm -rf /home/user/tmp/* >> /dev/null 2>&1 However I'm looking for a more efficient way which would be less CPU ...
3
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1answer
1k views

How can I resolve CPU utilisation nearing 100% on IIS

I have a .net web API application and the required SQL server hosted on an IIS. The task manager shows 100% CPU utilization most of the time, but memory usage is fine. How can I analyze and fix what ...
0
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0answers
307 views

2008 R2 SQL Server on AWS, CPU spikes every three hours

I have a Windows Server 2008 R2 virtual machine in Amazon EC2, running SQL Server 2008 R2. Every three hours, like clockwork, the server's CPU usage will spike to 100% for about 10 minutes or so, to ...
1
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0answers
216 views

Resource Monitor Showing Incorrect (?) CPU Usage for Services

Resource Monitor on my Windows Server 2012 R2 is showing high CPU usage for process oracle.exe (~75%). However, it also shows that CPU usage is divided among totally unrelated services. Namely the ...
0
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2answers
379 views

Windows SNMP Traps

I test SNMP Traps on Windows 10 and Windows 7. Windows 7 has Traps Sender and Windows 10 has Traps Reciever. Enabled SNMP On Windows 10 & 7. Enabled Traps On Windows 7. Installed a Traps ...
6
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2answers
6k views

stress-ng: Simulate specific cpu percentages

Linux environment: Debian, Ubuntu, Centos Goal: Test monitoring program that set alarms and trigger different alarms at different cpu percentages. ex: (30-50%), (51-70%) and >90% So I need a cpu ...
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1answer
402 views

How does process CPU usage relate to Load Average? [duplicate]

I have the following host / load: Two 6-core CPUs, with HT (From what I understand, max load would be 24.0) 12 "primary" processes, with sustained usage of about 50% CPU Load average: 0.86 0.98 0....
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3answers
209 views

Can't connect to virtual server that shows 99% CPU usage

Our CPU usage showing 99% since last 24 hours due to this usage we can't able to connect the server through SSH. We are using this server for our Magento 2.0 webstore. We have rebooted the server ...
2
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0answers
459 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 ...
0
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0answers
753 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 ...
3
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1answer
1k 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 ...
0
votes
1answer
203 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
votes
1answer
170 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
368 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 ...
2
votes
1answer
1k 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 ...
0
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1answer
4k views

CPU usage plot in Grafana

I am trying to plot CPU usage in Grafana. Collectd gives metric to InfluxDB and I get metric from Influxdb into Grafana. I have tried taking derivative of last value but CPU is in negative. I want it ...
0
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1answer
700 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 ...
5
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2answers
800 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 ...
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1answer
304 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 ...
3
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2answers
13k 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
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2answers
865 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 04:...
2
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3answers
71 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
239 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) ...
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0answers
393 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 ...
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votes
1answer
107 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
283 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 ...
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votes
1answer
1k 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
167 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 ...
7
votes
1answer
406 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
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1answer
261 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
787 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, ...
2
votes
1answer
1k 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 ...
0
votes
1answer
174 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 ...
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2answers
535 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 generating ...