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1answer
16 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 ...
3
votes
1answer
928 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 ...
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3answers
7k 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
48 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 ...
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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) ...
0
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1answer
27 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 ...
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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 ...
0
votes
1answer
661 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
vote
1answer
33 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
54 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
110 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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4answers
7k 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
769 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
0answers
11 views

MS SQL Server CPU load goes up dramatically when turning on 2014 features by setting compatibility level [migrated]

I'm running some Microsoft SQL Server 2014 load testing on a decently spec'ed machine. I'm certainly not an expert on the SQL Server tuning specifics, but with the bits an pieces I've gathered from ...
0
votes
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
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 ...
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7answers
1k 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
37 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
26 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
89 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
61 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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vote
2answers
352 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
44 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
61 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
40 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 ...
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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
42 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
136 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
90 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 ...
0
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0answers
78 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 ...
2
votes
1answer
370 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 ...
-2
votes
1answer
84 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 ...
2
votes
2answers
255 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 ...
0
votes
3answers
457 views

Mysql killing the CPU with gettimeofday

I have a problem with mysql killing the CPU on a Debian Squeeze 64. This is a development machine on a VPS so I stopped all the other services, including apache2. The mysql version is 5.1.49. This is ...
0
votes
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 ...
1
vote
2answers
869 views

w3wp.exe using 50% CPU time when website is not doing anything

I've got a Windows Server 2008 running IIS 7 with a number of different website each with there own application pool. Occasionally each one of these sites will fire up a w3wp.exe process when nobody ...
2
votes
2answers
53 views

Monitor CPU utilization for each user

Is there any way to monitor the CPU utilization for each user at regular intervals Currently using the sar command I am able to get the following output: 12:00:01 AM CPU %user %nice ...
17
votes
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 ...
9
votes
4answers
824 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 ...
0
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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 ...
2
votes
1answer
1k views

How to debug Node + Socket.io CPU Issues

We are running a Node Socket.io server with Express 3. The server is monitored using Forever. The service is running well, but the CPU grows throughout the day, until it reaches 90%+ and then suddenly ...
4
votes
1answer
637 views

Growing OS cache in RAM causing high system CPU usage

Long question, so please bare with me: I'm having a weird issue with a server that I've never seen before. On a machine with ~30G of RAM with an application that takes ~10G (spread across hundreds of ...
1
vote
1answer
133 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 ...
1
vote
3answers
6k views

How can i diagnose IIS pushing the CPU to 100% usage?

I have a web server with more than a few ASP.NET sites running on it. Every so often, i notice that IIS is pushing the server's CPU to 100%. The sites share application pools, per .NET version they ...
0
votes
1answer
74 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 ...
3
votes
1answer
145 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 ...
19
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3answers
3k 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 ...