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-1
votes
0answers
8 views

Munin interrupted graph for today, but normal for days ago

I have a trouble with munin plugins (it lasts about a month). One of plugin's view looks like: But, when i go to see this period 2 days ago, graph has normal view. But i am sure, 2 days ago this ...
-1
votes
0answers
22 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 ...
1
vote
0answers
18 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
votes
0answers
26 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
809 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
4answers
989 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
2answers
47 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 ...
16
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 ...
2
votes
1answer
59 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 ...
9
votes
4answers
402 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
votes
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
votes
1answer
145 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" ...
4
votes
1answer
475 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
74 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
5k 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
40 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
76 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 ...
2
votes
0answers
87 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 ...
19
votes
3answers
2k 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 ...
-2
votes
3answers
92 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
94 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 ...
4
votes
4answers
680 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.
1
vote
3answers
1k views

Huge host CPU usage in idle vmware guest. Ubuntu 10.04 host, Vista SP2 guest

I'm experiencing huge host CPU usage with an idle vmware guest. Host: Ubuntu 10.04 32-bit 2.6.32-24-generic-pae. (Very new install, i.e 24 hours ago) Hardware is Dell XPS M1530 laptop, 4GB ram. ...
0
votes
1answer
145 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 ...
0
votes
2answers
63 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; ...
1
vote
2answers
46 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 ...
8
votes
3answers
7k views

Kill process with high CPU usage after X time? [closed]

running linux i have a few processes which tend to crash occasionally (game servers), which end up using 100% cpu. I'm looking for a program or script to check the cpu usage of a list of processes by ...
12
votes
11answers
7k views

What creates CPU I/O wait but no disk operations?

I have CPU I/O wait steady around 50%, but when I run iostat 1 it shows little to no disk activity. What causes wait without iops? NOTE: There no NFS or FUSE filesystems here, but it is using Xen ...
0
votes
0answers
56 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
votes
2answers
63 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 ...
0
votes
1answer
43 views

How to understand details of CPU usage

I have a VPS server. At the CPU usage chart I see long periods of 50% CPU usage that are not related to chart of visitors of my site: http://c2n.me/iRJplq. I checked top and most of the time fastcgi ...
0
votes
1answer
244 views

How can I get the CPU usage for a given process out of collectd?

I'm running multiple ubuntu (precise) boxes & I've got collectd pushing data up to a central logstash box, which is then sending it to carbon (graphite). I'm running the processes plugin for ...
8
votes
2answers
5k views

How to monitor CPU usage and performance on a Hyper-V server with several VM's

I have a server that is running Windows 2008 64 bit Hyper-V, with 8 gigs of RAM and Intel Xeon X3440 @ 2.53 Ghz, which gives me 8 logical cores in the performance monitor on the host system. I have ...
0
votes
1answer
98 views

server using too much cpu with nginx and gzip enabled

I have magento website on dedicated server. I decided to use gzip to save ban-with for magento websites and wanted to load them faster. But now server is using %250 more cpu if I click on a category ...
0
votes
1answer
84 views

Why does Apache split up the CPU for www-data processes out of 100 or 200?

It seems like Apache always splits up the CPU usage for www-data processes out of 100 or 200. Why is this? For example, one www-data process = 100% CPU usage: http://i.imgur.com/mfRuOSm.png Four ...
1
vote
1answer
54 views

Apache high CPU usage but medium overall CPU usage

I am running a website on an Apache server. The server itself is an 8 core server with 35G RAM. I am monitoring the statistics of the apache resource usage and the overall server resource usage. I ...
0
votes
1answer
692 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
0answers
49 views

How to Prioritise ssh logins (nice)

Exact duplicate of this question, which has an accepted answer that doesn't solve the problem. How do I set sshd to run with a higher priority, so that even if the system is massively overloaded ...
-1
votes
1answer
60 views

Does/can serving larger files (images in this case) necessitate increased CPU load on a linux/apache web server?

We are experiencing quite a high CPU load on our web server right now (I'm just doing some research, I am not actually the website's administrator) One of the most significant changes has been a new ...
1
vote
1answer
113 views

After Robocopy backup, explorer.exe is using 100% of CPU on critical fileserver

Last night, I did a routine manual backup using Robocopy backing up and entire drive of a critical file server (windows 2008 r2) to a backup server on the same network. This morning (around an hour ...
0
votes
1answer
2k views

iexplorer.exe high CPU/RAM usage

My client has a virtual Server 2008 R2 terminal server running under ESXi 5.1. This server has, which been in production for around 4 months, experiences intermittent slowness / non-responsiveness ...
-3
votes
1answer
47 views

Comparing “user time” for same operations on different cpu

In my accounting system i limit using cpu-time by user. But on servers with different cpu's same operation may take different cpu-time. Now i want compare perfomance for my servers to introduce factor ...
1
vote
0answers
81 views

virsh vcpu_period and vcpu_quota

I have been looking into ways to divide my CPU amongst KVM guests other than by just setting vCPU access limits. I understand the concept of cpu_shares which can be set/displayed with virsh schedinfo, ...
12
votes
4answers
22k views

What does 'nice' mean on CPU utilization graphs?

On Ubuntu server load graphs I see 4 types of CPU consumption: User, System, Nice and Idle. What does Nice type mean?
-1
votes
1answer
181 views

Holding F5 on Wordpress site causes 100% CPU (Apache) [closed]

I am running an instance of Wordpress on an Ubuntu 10.04 VMWare server. If I hold F5 or CMD+R on a page or post, both CPU's on the server will climb to 100%. There will be plenty of free RAM left, but ...
0
votes
0answers
78 views

high mysqld cpu usage after moving to new server

Just moved to a new (more powerful) server with only one website running on it, no changes on the website, but now I got a horrible high CPU load and I can't find out why. top: top - 22:54:08 up 1 ...
-1
votes
1answer
83 views

Using SNMP to retrieve CPU Idle, User and System, Raw Information 32 bit counter

I am using snmpget to retrieve raw information from: ssCpuRawIdle.0 ssCpuRawUser.0 ssCpuRawSystem.0 As I understand they are on 32 bit counters. I also use ifOutOctets and ifInOctets to retrieve ...
3
votes
0answers
178 views

How to investigate the cause of a 100% CPU event that lasted for hours?

Yesterday the CPU on my Xen-based VPS server went to 100% for two hours and then went back to normal, seemingly naturally. I have checked logs including syslog, auth.log and more and nothing seems ...
0
votes
3answers
456 views

Which settings schould be changed to lower apache CPU usage and use more RAM?

On our CentOS 6 server, we have now a lot of CPU overload, while our RAM is almost not used. KeepAlive is set to "on" because we have some AJAX elements on your website and serving many files such as ...
3
votes
1answer
153 views

Memcached keeps increasing cpu ussage

I'm running a memcached server which is serving two front end servers. These are connecting to the memcached server from Apache2/PHP using the standard PECL library. For some reason the memcached on ...