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

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1answer
128 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 ...
-1
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1answer
1k views

High CPU Usage in windows server 2003

In one of our production servers the CPU usage is 100% and thus some of the backup jobs failed. In windows server 2003 cms.exe shows : 50%, tomcat_3.exe : 25%, and tomcat_1.exe : 25%. Please help me ...
0
votes
1answer
54 views

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 ...
0
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0answers
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% ...
0
votes
1answer
914 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" ...
0
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2answers
789 views

Current Load is WARNING - why?

On a VPS with 1 CPU core and 2GB RAM, I run a mysql+apache2 for a low traffic website. Sometimes the machine slows down or stops delivering through apache or mysql. That's why I set up nagios which ...
4
votes
1answer
1k views

How to trace high CPU Apache process to particular virtualhost

Looking at the output of top I notice that intermittently there are one or two Apache processes consuming a high amount of CPU - anywhere between 50% - 90% The spikes in CPU usage come and go quite ...
2
votes
1answer
24 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
votes
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 ...
4
votes
4answers
2k views

IIS App Pool High CPU usage despite no requests

I have recently migrated a set of Windows Server 2008 R2 / IIS 7.5 servers to new servers running Windows Server 2012 / IIS 8. I am experiencing some odd behavior from IIS. We have 2 identical ...
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
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0answers
38 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 ...
2
votes
2answers
507 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 ...
0
votes
2answers
40 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 ...
0
votes
2answers
130 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 ...
4
votes
3answers
4k views

100% CPU when doing 4 or more concurrent requests with Magento

Currently I'm having trouble with a server running Magento, it's unbelievably slow. It's a VPS with a few Magento installations on it used for development, so I'm the only one using them. When I do 4 ...
0
votes
1answer
109 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 ...
2
votes
3answers
2k views

Windows 2003/2008 terminal server, Application using 95-100% CPU when crashed, auto kill process?

We are currently hosting two terminal servers for our users to connect to via Citrix Metaframe. One of the applications we host there is an inhouse application that was programmed a long time ago, ...
0
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0answers
27 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 ...
0
votes
1answer
62 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: ...
0
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1answer
1k views

VPS CPU usage very high

I just switched my hosting to a VPS. I will admit that server admin is something I am very very new at. Anyhow, I am getting repeated emails about my server load exceeding 100% so i clearly need to ...
0
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3answers
517 views

Proper acting when a process is consuming 100% time of CPU

On several machines I have a problem with a process that is using 100% time of a CPU. USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND root 85740 100.0 0.2 34668 ...
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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 ...
0
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0answers
70 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 ...
0
votes
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 ...
9
votes
3answers
8k views

Is there a way to calculate the percentage CPU utilization by reading /proc/stat at once?

I guess the question is, could I somehow calculate the CPU utilization percentage just by reading the /proc/stat once? # head -1 /proc/stat cpu 67891300 39035 6949171 2849641614 118251644 365498 ...
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1answer
113 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 ...
0
votes
2answers
2k views

IIS7: How to handle application pools which uses too much memory or CPU?

How to handle application pools which uses too much memory or CPU? I would like to have possibility to select for how much time application pool is using certain amount of memory or cpu (or both) ...
1
vote
1answer
97 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
votes
2answers
96 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 ...
5
votes
3answers
6k 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. ...
2
votes
1answer
152 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 ...
11
votes
4answers
8k views

What does %st mean in top?

Here is an example from my top: Cpu(s): 6.0%us, 3.0%sy, 0.0%ni, 78.7%id, 0.0%wa, 0.0%hi, 0.3%si, 12.0%st I am trying to figure out the significance of the %st field. I read that it means ...
0
votes
1answer
835 views

Linux Load Averages and HyperThreads

My rough understanding of a Linux load Average is that for every integer a CPU core is working all the time. For example, 1 means on a 4 core system that 1 core is working at capacity. How does ...
0
votes
3answers
2k views

Smallest footprint OS [closed]

Many FreeBSD users tell me that FreeBSD has the smallest footprint in terms of CPU & RAM usage. I'm looking for a server OS with the smallest possible CPU & RAM usage, so I will try FreeBSD ...
10
votes
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
votes
1answer
63 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 ...
0
votes
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 ...
0
votes
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 ...
1
vote
1answer
95 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 ...
1
vote
2answers
357 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
2k views

Why does mpstat show different values when I use the interval setting?

Here's the output I get when I run mpstat: $mpstat Linux 3.2.0-30-generic (my-laptop-C650) 09/17/2012 _x86_64_ (2 CPU) 05:32:01 PM CPU %usr %nice %sys %iowait %irq %soft ...
3
votes
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 ...
0
votes
1answer
82 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 ...
0
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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 ...
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
2answers
1k views

top command - cpu from processes do not add up

I understand the various types of cpu usage reported by the top command (6.5%us, 17.2%sy, 0.0%ni, etc...), but why does the total %CPU for each process not add up to any of the Cpu(s) values? For ...
0
votes
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 ...
1
vote
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, ...
0
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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 ...