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0
votes
1answer
101 views

Where should I start to try and debug a CPU spike and timeout when logging in to a Moodle site?

apologies for the newbie nature of this question .. I am a web developer though don't have too much experience maintaining servers or debugging and fixing performance issues. I have a Moodle site ...
7
votes
3answers
5k 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 ...
0
votes
1answer
65 views

Checking Dedicated server resource usage from its VPS

I'm using a VPS from a hosting provider. My VPS has 6 cores. In the past few weeks, i usually used upto about 4-6 cores at any time point. My web pages used to load very fast (about 2-4 seconds). But ...
0
votes
1answer
248 views

ESXi CPU resources distribution

I have ESXi hypervisor with i7 990x cpu and i want to understand how to provide resources to 4 Virrual Machines with maximum benefit. First my idea was to provide 1 core for less cpu-dependent vms, ...
1
vote
2answers
169 views

Why is DU causing high CPU usage?

On CentOS 6.5, du -sk /home and sh -c (du -sk \/home) 2>/dev/null run because a scheduled disk usage for /home, but du is causing 100% CPU usage. Plus, before it's even finished, another du gets ...
1
vote
2answers
802 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
0answers
118 views

High Mysql CPU usage + high amount of queries

My Root Server is currently warning me that the cpu usage by mysql services is approximatelly higher than 300 % (quad-core) Also the mysql tracking tells me that there are ~2,000 queries per second. ...
0
votes
4answers
117 views

Does using all cores reduce efficiency?

I have a program (well, php script) which does some pretty heavy text searching - it loads a 2mb and 40mb file and searches through them to find where each word that appears in the first is present in ...
0
votes
1answer
262 views

EC2, huge difference between top/sysstat and CloudWatch (cpulimit involved)

Yes, I read that it is normal, but in my case disparity is huge and I can't explain it, just look: I ran sar command for a while (last lines): 04:53:01 PM all 0.40 0.00 3.41 ...
0
votes
1answer
381 views

12.04 Migration Process time delay

We have an issue in our server that is the migration process in taking time and also the load in the server is getting high due to that. No LSB modules are available. Distributor ID: Ubuntu ...
-1
votes
1answer
204 views

Apache 100% CPU for simple PHP API

I have a new server install of CentOS 6.4 64bit on a VM with 2 cpu and 8gb of ram. The server has nothing installed other than apache and php. The server is hosting a simple web API that writes data ...
2
votes
1answer
781 views

Find which service is causing high CPU usage within single svchost process (Win2008 R2)

This is probably a stupid question, but for the life of me I cant remember! I have a virtual win 2008 R2 server running on a HyperV box (not that this should matter), It is an SQL server. I noticed a ...
2
votes
4answers
1k views

Nagios - measuring Average CPU Load

I've been looking for some hours now for a plugin that will notify me if one of my server's CPU Load has been over 90% for the past 5 hours. No luck looking around the Nagios Exchange. Can anyone ...
0
votes
0answers
211 views

MySQL service takes a lor of CPU (780%)

I have a web server with MySQL and apache2. Server running a blog engine and normally it works fine. Yesterday (this is the second time) MySQL takes high CPU usage (790%) and the server hangs. The ...
1
vote
1answer
240 views

Why does a suspended process show high CPU usage in ps?

Sometimes when a process is suspended (in T state) the output of ps shows the process using an unusual amount of CPU%. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND cossey ...
3
votes
1answer
458 views

Limit httpd.exe CPU usage

We are using Collabnet Subversion Edge in one of our VMs, and occasionally one of the httpd.exe processes spikes to ~100% and just sits there. I believe it's interfering with our overnight backup ...
1
vote
0answers
86 views

High CPU interupts when CPU usage is very low

I have a CentOS 6 VM running on Win2012 Hyper-v server. This server has 12 processers, 60GB memory, Raid-5 SSD. There's nothing running on the server yet, but it has very high cpu interrupts, always ...
1
vote
1answer
145 views

KVM host only using one core out of 8

This KVM host is only running one VM/guest right now, and it is running with -smp 1. Top shows only the first core being active. Is that expected when using -smp1? The guest OS is Windows XP. The ...
1
vote
1answer
288 views

Apache cpu usage increases over time in large cluster [closed]

I have an odd one that I just noticed yesterday. Over a 24 hour period, the cpu load on our apache machines (16 dual hex core machines) doubles. We handle about 8 billion requests per month, and ...
0
votes
0answers
202 views

CPU usage rises to 100% in a few minutes on Tomcat web sever

I have an web app running on Tomcat 7 server. The rest of the configuration is: Intel i7 3930 32GB RAM 2x2TB HDD 20TB Bandwidth Debian 6 mysql 5.5.9 I'm using Ganglia for monitoring the load. ...
0
votes
1answer
309 views

SBS Server 2008 with periodic lsass.exe using 100% of 1 Core

SBS Server 2008 with everything running on it (AD/PDC, SQL 2012, FileServer, RDP Gateway, WSUS, No Exchange though). Every 30 minutes on the hour and half hour, lsass.exe uses 25% of the CPU (1 core ...
5
votes
2answers
1k views

CPU allocation for VMs on ESXi

I'm a complete VMware know-nothing, but I recently set up 4 VMs on ESXi. 3 of the VMs are very non-resource-intensive (a lightly used file server, a lightly used domain domain controller, and a VMware ...
2
votes
1answer
544 views

Should CPU usage be so low while memory usage is high on heavy mysql server?

I'm using ubuntu server 12.04 x64. The server receives a lot of requests to mysql through apache web server (it's light interface). From mysql stats I see there is approx 250 queries / second from 8 ...
0
votes
2answers
1k views

High Load, low CPU, Memory and Disk IO - Highend Server

This issue has been bugging me for the past several days having spent over 40 hours investigating this issue intensively. Effectively we run asterisk 1.4.42 which I understand is old, however is the ...
0
votes
1answer
54 views

what will happen if my cpu usuage stays 100% for 30 mins or so on linux server

I have Amazon Ec2 small instance with 1.7Gb RAM. I have 3 websites running on them. I have the scripts which does the web crawling every day and perform some caluclation. I have not deployed them ...
4
votes
1answer
1k views

CPU% more than 100 in ps -aux

We use ps -aux to find out when tomcat process takes high CPU utilization, if that so we will send a alert to Group. But some times %CPU shows more than 100, but our application working fine. Is it ...
0
votes
2answers
483 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 ...
0
votes
0answers
96 views

Get an OpenVZ container's cpuload realtime in a bash script

I have a bash script which uses CPU cores rather intensively. Recently my VPS was suspended due to server load. The main reason is a cron job for a bash script which checks for Wordpress plugins and ...
1
vote
2answers
2k views

httpd high cpu usage slowing down server response [duplicate]

my client has a image sharing website with about 100.000 visitor per day it has been slowed down considerably since this morning when i checked processes i've notice high cpu usage from http .... ...
1
vote
1answer
82 views

Debugging high CPU load when adding new domain inside server's control panel

When adding a new domain inside my server's control panel it takes much longer than usual since some time. CPU shows 100% usage on one core and strace reports something like this: poll([{fd=7, ...
0
votes
1answer
78 views

CloudLinux equivalent for Windows

Is there any configuration or software solutions that would provide similar resource throttling per user like CloudLinux does for Linux? We currently run game servers on Windows 2008 OS and the major ...
2
votes
2answers
3k views

WHM/CPANEL - High cpu and memory usage from Analog Stats

A single process is taking 100% of the cpu and 70% of the memory and starts every day on different account; /usr/local/cpanel/3rdparty/bin/analog +CIMAGEDIR /images/ +CDOMAINSFILE ...
0
votes
1answer
34 views

MySQL Process Big

Ok, so I don't know if this is a repeat question so I'm sorry if it is (I couldn't find anything like it after searching =/) My server seems to be running what seems to me a larger than normal mysql ...
-2
votes
4answers
228 views

How can I get combined CPU usage for all CPUs in one line on Linux? [closed]

I want to output the following: Average CPU utilization across all cores, over the last n seconds, in a single percentage value. So if I have 4 CPUs and their combined user and system utilization ...
1
vote
1answer
1k views

How to monitor CPU usage on a device running embedded Linux and BusyBox?

I recently began working with a device that uses embedded Linux and BusyBox. It is very stripped down, and does not have iostat or sar. It also doesn't have dpkg or apt for package management. The ...
1
vote
1answer
564 views

CPU Usage vs load average [duplicate]

I'm running debian iostat -x Linux 2.6.32-5-amd64 (server56856.uk2net.com) 27/04/13 _x86_64_ (4 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 4.59 0.01 ...
0
votes
1answer
39 views

How to find out CPU usage of DLLs within an instance of svchost.exe

My Windows Server 2008 R2 should be almost idle, yet it's taking about 12-15% CPU almost all the time. The busy process is an instance of svchost.exe Using SvcHost Process Analyser, I've established ...
0
votes
2answers
63 views

High Processor Usage

I have a Linode VPS and am getting alerts regarding high CPU usage every few days - a reboot solves the problem - but would rather find the issue. I'm running Ubuntu 12.10 and other than PHP, MySQL ...
-1
votes
1answer
50 views

How to configure Apache so that I can get server resource stats per website / per script

How can Apache be configured so that it will be simple to get server resource stats (CPU, memory) per website (as defined by a separate sites-enabled entry) and / or by script (each .html or .php file ...
0
votes
1answer
286 views

How can sleeping processes in “top” be using a percentage of CPU?

When we run top we occasionally see a sleeping, "S", process which is using %CPU; I would expect all sleeping processes to use 0% CPU since they are not active. I would expect only running, "R", ...
0
votes
1answer
285 views

Understanding CPU Throttle

kernel /vmlinuz-2.6.32-379.22.1.lve1.2.17.el6.x86_64 ro root=UUID=7cb0b445-0f63-4ef1-ab73-93c114d8ef6c rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto ...
2
votes
1answer
311 views

Apache high CPU usage, setting a overload limit

On a ubuntu server, I run a LAMP environment with APC, and fast-cgi as php mod, to host 2 wordpress sites, and both sites have Wordpress Total Cache (W3TC) plugin configured. The server's specs are: ...
2
votes
1answer
2k views

Why does a mysql query, that requires copying to tmp table, randomly sometimes consume 100% CPU during several seconds?

I have some crazy SQL queries in my PHP scripts which badly need some optimization. However the question is NOT about how to optimize them. These queries have a lot of "join"s and some bizarre "order ...
0
votes
2answers
79 views

When upgrading hardware to increase program performance, which should I consider first CPU, RAM or both? [duplicate]

I have a simple script that I wrote in PHP (which, after reading lots of QAs seems to have less than desirable memory management). It's an extremely small script that loops through configuration ...
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 ...
1
vote
1answer
393 views

Two CPU cores at 100% utilization after soft lockup on two CPUs, is this normal?

I had two of my CPUs lock up on one of my servers. From dmesg: BUG: soft lockup - CPU#1 stuck for 23s! [vmx-vcpu-0:6148] and later: BUG: soft lockup - CPU#2 stuck for 23s! [vmx-vcpu-0:6148] I'm ...
0
votes
1answer
221 views

CPU load steadily increasing and MySQL 1.5 GB open deleted file in temp directory

I have a CentOS server that is running cPanel (shared hosting server), I have had troubles with MySQL before and I spent some time configuring and tuning it, until finally the load dropped (from ...
0
votes
3answers
1k views

Windows Server 2008 task manager shows not more than 25% cpu usage for a process, how to increase this value?

Is this a feature or limitation compared to ordinary single user Windows 7/8? Is there a way to give one user access to say 50, 75% of overall cpu resources for running a software/process?
0
votes
3answers
57 views

Finding the file/script that invoked a process

I do have a high CPU utilization PhP Process. This process in turn seem to invoke mysql and both processes together are using all the CPU cores and RAM using ps aux | grep php , i could get the ...
4
votes
1answer
149 views

mongo and app server cpu

The beginning: We are using uwsgi and I decided to switch our configuration to use more workers/processes. Why: We have been seeing a traffic increase lately and in my tests with apache benchmark, ...