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0
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0answers
13 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
32 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
0answers
90 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
34 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 ...
1
vote
2answers
933 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
1k 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
28 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 ...
0
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0answers
23 views

Virtual MS Sql Server not consuming enough CPU [migrated]

We have a Win2008 server 32 bit running as a virtual machine under ESX server. It has 6 CPU cores of 2Gz each and 4GB ram. It's running MS Sql Server 2008 R2 only. Problem: The server is heavily ...
0
votes
0answers
15 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, ...
10
votes
4answers
17k 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?
16
votes
3answers
369 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 ...
-1
votes
1answer
99 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
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0answers
51 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
51 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
78 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
78 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
59 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
22 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
30 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 ...
1
vote
2answers
125 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 ...
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
2answers
97 views

Guaranteeing Shell Responsiveness on Pegged System

So my system is getting DOS'd, or I've just opened a kind-of-huge file (openstreetmaps planet.osm). The system goes totally unresponsive... so unresponsive that it'll take about 10 minutes to get into ...
2
votes
1answer
110 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
2answers
414 views

Where is the high load coming from?

Last night I recieved a lot of messages from DirectAdmin saying: load average on your system is 46.86, or some similar number. It comes with a 'top' printout, but all I can tell from that printout is ...
0
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0answers
44 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 ...
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votes
4answers
2k views

Graphing per-user CPU usage on a Linux machine

I want to graph (graphical output would be great, i.e. a .png file) the following situation: I have users A, B, and C. I limit their resources so that when all users run a CPU intensive task at the ...
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votes
1answer
120 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
4answers
1k views

Hyper-V CPU Utilization, Good Tools? [closed]

I just learned a ton from this post: Host CPU% doesn't include child VM CPU%, specifically I learned that both the 'host OS' and 'child VM' are siblings within the HyperVisor layer. Are there good ...
2
votes
0answers
59 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
135 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, ...
0
votes
2answers
213 views

Citrix XenApp slowness on ESX 4

I need some help with a some CPU constraint issues( i think) diagnosis. I have a client with a Citrix Xenapp farm (5 desktop servers/9 Application servers) spread accross 12 ESX hosts running ESX4.0. ...
1
vote
1answer
432 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
65 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
3answers
2k views

Need help trouble shooting high CPU usage by PHP-fpm

There is a problem that is driving me crazy. After the day I tried to fix the CPU usage problem of my VPS, the CPU load has grown from 60% to 150%, and I have no idea what causes the problem. Please ...
0
votes
1answer
48 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
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3answers
831 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
38 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
95 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
227 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
48 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. ...
1
vote
1answer
703 views

How to resolve high CPU + excessive stat(“/etc/localtime”) and clock_gettime(CLOCK_REALTIME) calls

I've been experiencing really high CPU on a ruby on rails app (see stack below) and have been trying to diagnose the possible causes to no avail. Stack: ruby 1.9.3 rails 3.2.6 Apache/2.2.21 ...
2
votes
0answers
229 views

VMware Fusion Ubuntu 12.04 LTS Server - Soft Lockup CPU Stuck

I have a strange Stuck Problem with VMware Fusion and Ubuntu 12.04 as Guest System. On High Loaded process the System stucks with "Soft Lockup CPU Stuck" and i have to reboot the VM...the Same System ...
0
votes
4answers
71 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
136 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
135 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
101 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
100 views

VPN slow due to xl2tpd utilizes 99-100% CPU

I have a VPN up and working. The problem arises whenever xl2tpd is trafficked. It will continuously build up its CPU usage until it hits 100%. From there on the download speed declines and hovers ...
2
votes
4answers
362 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
32 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. ...
0
votes
1answer
34 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 ...