The tag has no wiki summary.

learn more… | top users | synonyms

-1
votes
0answers
28 views

Optimizing Apache for large file serving

I have a random problem with Apache that I can't quite figure out, here is my setup, Windows Server 2008 R2, 64 Bit, 5GB RAM, SSD with 200 MB(Read/write) and Dual Core CPU @ 2.1 GHz A dump from ...
0
votes
1answer
37 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
0answers
4 views

Centos running very slow in Virtualbox [migrated]

I am running Centos 7 in Virtualbox 4.3.14. The VM is configured with 2 CPUs 4 GB RAM 3.10.0-123.4.4.el7.x86_64 kernel The host machine is running Windows 7 Pro SP1 64-bit Intel i7-4790 CPU, ...
0
votes
0answers
19 views

Desktop is restarting when CPU load more than 60% [migrated]

My desktop is restarting frequently when CPU load is 60% or more for few seconds. i cleaned CPU fan dusts but still it is happening. so what could be the problem?
0
votes
1answer
33 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
29 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 ...
1
vote
3answers
126 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
78 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
22 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
41 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 ...
3
votes
1answer
162 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
64 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 ...
-3
votes
1answer
38 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
32 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, ...
-1
votes
1answer
132 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
58 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
58 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
96 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 ...
16
votes
3answers
592 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 ...
0
votes
3answers
111 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 ...
2
votes
1answer
76 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 ...
0
votes
0answers
27 views

Server usage topped 100% and crashed - how to diagnose and prevent

I'm running a small webserver on Ubuntu 12.04. Last night, the server topped off at 100% cpu usage and crashed. This is unusual as I'm normally around 1-5%. I suspect a DDoS attack from someone ...
1
vote
0answers
32 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 ...
11
votes
4answers
3k views

Why is 1 of my 24 CPUs Pegged at 100%?

I have an HP ProLiant DL380 G7 system using 2 6-core CPUs, with Hyper-threading enabled, for a total of 24 logical CPUs (as seen by Windows). When running our application, total system CPU ...
2
votes
1answer
214 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 ...
0
votes
0answers
51 views

How to solve problematic cpu load due to encryption when using SFTP on a VM

my company is trying offer a sftp service for a big amount of customers. The serving machine will be on a VM and tests have shown that, with an increasing amount of simultaneous users, the cpu becomes ...
-1
votes
1answer
183 views

Monit system cpu usage

Monit version: 5.0.3 Server: Ubuntu 10.04.4 LTS I want to monitor the system cpu usage with Monit and I am trying as follows: check system host_name if cpu usage (user) > 70% then alert if ...
2
votes
0answers
85 views

Vmware 5.1 ESX linux host cpu keep climbing overtime

I have Debian lenny with php and mysql, in Vmware 5.1 ESX. Cpu keeps climbing over time. After about 50 days, cpu usage is 100% by apache and mysql but it is climbing day by day. If I restart these ...
0
votes
2answers
203 views

Jetty Server High CPU Load

Sometimes jetty loads our server for 100% - every thread for 100% of 1 core. We have jetty 9 and JDK 1.7 (at Jetty 6 and JDK 1.7 - this doesn't appears). Jetty now running on default settings, ...
2
votes
1answer
636 views

Taskset not working over a range of cores in isolcpus

To preface I'm using Debian Wheezy with kernel 3.2 on an AMD64 chipset. My machine has two Xeon E5-2690 cores. I set up the boot parameters so that all the cores on one CPU are dedicated to a single ...
0
votes
1answer
75 views

High CPU usage in RHEL machine

I have RHEL machine that runs postgres-9.1 database. In a particular time, sar output shows as follows: Refer link for snapshot: http://imgur.com/gKcOhOX,vNwTpwC#0 where as %user is high between ...
0
votes
1answer
61 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 ...
5
votes
3answers
2k 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
47 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
122 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
133 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
342 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
58 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
85 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
183 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
180 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
129 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 ...
0
votes
0answers
42 views

Mysqld high CPU load

I have a lindode 8192. web server is Nginx my cpu usage is between 90% and 500% with minimal traffic. (sometimes none) the culprit is mysqld. i've enabled slow query log and that is empty. ...
1
vote
1answer
235 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
504 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
159 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
211 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
318 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
66 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
105 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 ...