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

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My VPSs CPU load hardly go beyond 0.2. Am I wasting my money on unused resources?

Currently, I have 5 VPSs running: Mail server (Zimbra) Database server (MySQL, PostgreSQL) ERP Server (OpenERP 7) Git Server (GoGits) Web Server (Apache, Nginx) with server monitoring application ...
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23 views

Php5-CGI is using 100% CPU on a single hit. How do I track down the culprit?

I ran into a strange problem with a Magento Store. The server was crashing when we hat a little traffic-peak so I checked what was going on. Using htop I found out that PHP5 CGI is using up to 100% ...
2
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1answer
22 views

Load average increasing along with firewall throughput

I've just pushed a large change to my backend code and I've noticed a massive increase in the load average in the few hours since the push. I looked at Munin for what the problem might be and I ...
0
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0answers
21 views

How can I store systemd-cgtop output in a text file

I want to store the result of system-cgtop in a txt file for 5 iterations. I am aware of the batch mode and I tried to do it with the following command: systemd-cgtop -b -n 5 >> result.txt ...
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0answers
37 views

Use of CPUQuota in systemd

I am trying to put a hard limit in CPU usage for a dd command . I have created the following unit file [Unit] Description=Virtual Distributed Ethernet [Service] ExecStart=/usr/bin/ddcommand ...
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2answers
39 views

When should I consider to add more RAM to VPS instead of CPU? [closed]

I have a VPS hosting a Wordpress site. When the traffic is too high, I usually see the CPUs are very busy and fully occupied. Therefore, I always try to add more CPU cores to the VPS. For example, 4 ...
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2answers
127 views

100% CPU usage on my CentOS VPS

I have a 512 MB VPS and hosting 2 WordPress websites on this CentOS server. I have installed apache + mysql + PHP + fast cgi on this server. Everything was working great from last 6 months. I have 500 ...
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1answer
107 views

Get real time CPU usage of linux process with single line command and as a simple result

I've searched everywhere and found nothing about this. I'm trying to create a small gauge that shows the CPU usage of one process specified by PID. I need the command to print a simple answer , hence ...
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23 views

Two identical servers, one of them have 2x CPU load

Http requests are splitted 50/50 between two servers. Servers are running FreeBSD 9.2, their hardware, software & application configurations are absolutely identical. But one of servers is getting ...
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1answer
59 views

Tomcat CPU and GC going crazy [closed]

Having some major issues with our Tomcat 7 installation. It used to run fine for over a year, but now the CPU is mainly at 400% - 700% (8 core machine) and in the logs I see tones of these: ...
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0answers
21 views

php process eating CPU since October

Just noticed that my server CPU is being eaten by php at a regular rate of 50-60%. Worse, this is happening since last October but I can't really remember what I did then to cause. The CPU graph for ...
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0answers
64 views

PerfMon: Processor Queue Length - Random high spikes

I'm investigating alleged high CPU usage on one of our client's servers. After about 1 business day of "normal" activity, PerfMon is reporting the following values for Processor Queue Length, and I'm ...
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1answer
107 views

CPU Usage statistic in Windows Server 2008 R2 Resource Monitor

I'm trying to analyze the performance of HPC R scripts via Resource Monitor in Windows Server 2008 R2. I have referred to this guide to get more information on the CPU tab of Resource Monitor, but I ...
2
votes
1answer
45 views

VMware Infrastructure Web Access 2-CPU Limit?

I am running VMWare Infrastructure Web Access 2.0. I have several VMs running on 24 core machine. I just looked at the most resource-intensive VM and found it is running using only 2 CPU cores of ...
1
vote
1answer
96 views

System and ntoskrnl.exe taking up all CPU

I have a Windows Server 2012 file server that is hosting .vhdx hard drives for user profiles for Windows Server 2012 RDS. Every few seconds the CPU spikes to 100% on System. Running Process Explorer ...
4
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2answers
93 views

How to interpret values of Perfmon counter Hyper-V Hypervisor Virtual processor\CPU Wait time per dispatch

So there is a lot of guidance on the web that advises tracking the values of the Perfmon counter Hyper-V Hypervisor Virtual processor\CPU Wait time per dispatch as the nearest Hyper-V equivalent of ...
0
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1answer
20 views

Can SQL Server 2008 R2 be used to allocate resources by specific program?

Recently, I have come into a scenario where I have been brought in to help manage a hosted system where we host our own product for our customer. Each customer is given a unique user to a specific ...
0
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1answer
61 views

VPS policy states CPU usage limitations

I have found a cheap vps solution to cover my needs. Reading through the policies of the vps service, I found that they state "CPU usage should not exceed 70%". Is there a way to prevent this? I plan ...
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7answers
2k views

High CPU utilization but low load average

We are running into a strange behavior where we see high CPU utilization but quite low load average. The behavior is best illustrated by the following graphs from our monitoring system. At about ...
0
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1answer
102 views

Apache2 Serverload / CPU increase from 1% up to 90% - How to debug?

I´m using: Google Cloud Compute Engine Linux Debian + Apache2 Google Cloud SQL Wordpress Yesterday my CPU started increasing from 1-5% to 80-90%. I was developing on a wordpress site as it ...
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vote
1answer
93 views

Isolating a high-CPU PHP Process

I have a 16 CPU core server that's experiencing consistent load averages of 40-70. After camping on a top command for a number of hours, I've isolated the CPU spikes to a single user. After pressing ...
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2answers
29 views

How to measure CPU based on a threshold

We are tracking down the resource requirement for our production environment(windows). I need to find out the maximum CPU and memory utilization. I do understand that we can use the wmic command to ...
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0answers
53 views

Windows Servers on ESXi 100% CPU at year rollover

We have a number of Windows Server 2008 R2 SP1 servers running on ESXi servers. At year end rollover 2014 to 2015 the CPUs go to 100% and the machines hang. The solution appears to be a hotfix ...
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1answer
81 views

htop CPU usage information does not look consistent

Please have a look at htop screenshot below You can see there that current host has two CPU cores (or CPUs). All processes are ordered by CPU usage descending. So how is it possible that with ...
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0answers
45 views

Counterintuitive drop in CPU

I am running a memcached service in a linux container pinned to a specific physical core. As expected the CPU increases when the number of requests increase. The requests are sent from a workload ...
0
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1answer
50 views

Allow Apache use more memory

I use apache2 behind nginx on 8 core CPU 48GB RAM server. Now my system uses only 3GB of all memory, but there are high load on CPUs. How can I use my free memory instead of CPUs time? I also use ...
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0answers
118 views

Wordpress High load average 18 and cpu 81% on a dedicated server

my website works fine the day; load average below 3 and cpu below 50%. but at night load average 18 and cpu 81% and the website become very very slow. Photos are showing the active visitors at ...
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0answers
107 views

High CPU load because high CPU time for sys

I am using MariaDB galera cluster with two nodes + one node for arbiter. My system has 24 core CPU. I am getting stuck with CPU bound. Sometimes, my system consume CPU time to 1000% and CPU load get ...
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votes
2answers
505 views

XenServer 6.2 VM 100% CPU and 100% memory usage and won't boot

I had this problem today after a power failure. I had 2 vms and one of them won't boot and was using 100% of CPU and 100% of memory. Since it was very dificult to solve (at least for me) I want to ...
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votes
1answer
99 views

High IO wait when test disk with dd

My server is using two SATA disk Raid 1. I test disk using dd #!/bin/bash i=0 MAX_LOOP=10 while [ $i -lt $MAX_LOOP ] do dd if=/dev/zero of=/data/output bs=1G count=10 ((i++)) done ...
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1answer
147 views

System not being able to handle soft interrupts but having idle time?

I have a constant 5% and more CPU time spent in handling soft interrupts. Doe to that, the ksoftirqd is running almost constantly, but is using a very small amount of CPU (less than 1%). However, ...
2
votes
1answer
150 views

CentOs CPU usage 100% by sync_supers

I see it in the top -c Then I run strace of this process and see a lot of select(8, [3], NULL, NULL, {0, 0}) = 0 (Timeout) What should I do next? How can I find the reason of this? Any help ...
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2answers
1k views

How are CPU time and CPU usage the same?

In the Wikipedia page for CPU time, it says The CPU time is measured in clock ticks or seconds. Often, it is useful to measure CPU time as a percentage of the CPU's capacity, which is called ...
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0answers
32 views

How to reset CPU counters? [duplicate]

I have a Linux server (Debian 2.6.32-46-amd64) which has been online for 117 days. The server is basically an Apache + MySQL, and MySQL was usually at 100~200% CPU usage (using top) being the server ...
0
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1answer
903 views

Optimal configuration of “Processor load is too high” trigger in Zabbix

I monitor approx. 10 Linux servers with 4 CPU cores each with Zabbix. I was receiving way to many false alarms from "Processor load is too high" trigger lately. The "Processor load is too high" ...
1
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1answer
154 views

Website performance sluggish - High CPU and Disk Usage

Over the past couple of days my website's performance has been very sluggish, with queries taking a lot of time to execute. My CPU usage hit around 100% 4 times this week. Here is the output of top at ...
0
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1answer
99 views

PostgreSQL queries slower than before?

I am using PostgreSQL 9.3 server on my production server. Everything had been working fine for the past couple of months. But since the past week or so, PostgreSQL seems to have becomes very slow with ...
2
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2answers
336 views

Sudden increase in CPU usage and server response time

Over the past 10 days, I'm suddenly experiencing increased CPU usage on my website with CPU usage reaching 100% three times. During that time I'm unable to SSH to my website so I haven't been able to ...
3
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1answer
212 views

High CPU on MySql Fusion-io server

I've just finished reading this old Q&A which had some really good detailed information on a similar setup to ours, though unfortunately our problem (now) is not with replication. MySQL ...
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3answers
143 views

Find Script start time and uptime in centos

I have a php script (cron job) running on my server which takes up a lot of cpu. I took a look on the code and couldn't find anything wrong. Now I have to check the logs for anomaly and for this I ...
1
vote
0answers
369 views

Amazon EC2 T2 Small Instance CPU Usage Exceeding Limits

I am running WHM/Cpanel on an CentOS6.5 AMI on a Amazon EC2 T2.micro Instance. T2 instance baseline performance and ability to burst are governed by CPU Credits. Each T2 instance receives CPU Credits ...
9
votes
4answers
1k views

ps aux hanging on high cpu/IO with java processes

I'm having some issues with java process and nrpe checks. We have some processes that sometimes use 1000% cpu on a 32 core system. The system is pretty responsive until you do a ps aux or try to ...
2
votes
2answers
244 views

Solaris 10 ZFS ARC Maxed Out and CPU's Overloaded

We've been running ZFS for a couple years now on Solaris 10 on Oracle M5000 Enterprise server with 32 CPU cores and 256GB of memory. We are running a database/application on this server which appears ...
5
votes
4answers
1k views

vCPU performance between 1 or 2 vCPU's

Within virtualisation (Predominantly VMware) is there a performance advantage using either 1 CPU with 4 cores or 2 CPU's with 2 cores? Let's assume the application running on a VM can use two CPU's.
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0answers
31 views

High cpu usage of Play server when started by monit

When I run "play start" from command line, the CPU load is very light. But when monit starts the program (as the same user), then the CPU usage tends to 100 - 130% all the time! Here is the content ...
0
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1answer
370 views

high load average and cpu usage

I am experiencing high CPU usage here is the stats i got from server, the consumption after every restart in 15 minutes go upto 100%, what could go wrong? I have a site in laravel installed on the ...
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2answers
67 views

MySQLD is using 175% of the cpu

On one of the servers, I have mysqld running as slave DB. The CPU usage is 175% at the moment used by mysqld. Here are the results of SHOW PROCESSLIST; ...
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2answers
112 views

Set different warning thresholds for Nagios on weekends

I'm using Nagios to monitor CPU usage on my servers with the check_load plugin. On weekends we have some batch jobs running and there are hardly any real users anyway, so I'd like to have the warning ...
0
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0answers
115 views

Tomcat reach close to 200% CPU usage even after I stop all applications using Probe

I have a running tomcat that is reaching 198% CPU usage. I though that maybe it was one of its web applications however, I stopped all applications using Probe but the CPU usage did not go down. This ...
0
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2answers
148 views

Limiting process CPU usage

I have a Debian server (Linode) with 2GB of RAM and 2 CPU cores which I currently use as an email server and web server. I've recently installed Atlassian JIRA and noticed (with htop) that using JIRA ...