The amount of processing units of the CPU used to execute a task and how long it takes.

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4
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1answer
313 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, ...
3
votes
1answer
614 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 ...
1
vote
1answer
429 views

How to assign dedicated vCPUs to specific VM on Proxmox (KVM) or what system could do that?

I'm posting this here, because what I've found about the topic is either outdated, incomplete or not suitable for various reasons. I have wanted for a long time to learn how to map specific vCPUs to ...
1
vote
1answer
67 views

Two identical servers, one of them have 2x CPU load

Http requests are splitted 50/50 between two servers. Servers are running FreeBSD 9.2, their hardware, software & application configurations are absolutely identical. But one of servers is getting ...
1
vote
1answer
270 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
1answer
303 views

Apache/PHP Elastic Beanstalk - Track Which Request is CPU Intensive

At certain seemingly random parts of the day, my CPU usage will spike up from ~10% on 1 m1.large to 70% on 4 large servers. This all happens within 20 minutes and stays this way for a few hours and ...
1
vote
1answer
637 views

Mysterious per-session CPU limiting?

TL;DR: CPU-hungry processes are sharing cores on a multi-core server while other cores sit idle, whereas I expect the Linux scheduler to distribute jobs evenly across cores. What could cause this ...
1
vote
1answer
83 views

CPU spiking in Win2003 server with High NDM activity

We have a Win2003 server, where we receive files through NDM and at any time, we would be receiving 6 files from different sources. The CPU on this server is always > 95%, which causes all the ...
1
vote
1answer
518 views

Debian (Lenny) X2Go Client with 50% CPU

My x2Go Client uses too much cpu power, more than 50% all the time, even when I don't have an open remote session. Does anybody know how to check where the error (?) is located? Thanks
0
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1answer
54 views

%CPU at 99% when cronjob runs php script every minute

I am using a debian server and for some reason when I run this php script using crontab every minute it says that I am using 99% of the %CPU with the php command (in the cronjob the command is php) ...
5
votes
0answers
120 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 (...
4
votes
0answers
43 views

What process on a SonicWall Security Appliance Checks the DPI-SSL Client Inspection?

I'm interested in determining if there is high CPU usage on a SonicWall Security Appliance, but I don't know which process to check for high CPU usage. There are various options for this in the UI ...
4
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0answers
43 views

Right way of measuring overlay network performance

I am currently examining the performance (especially UDP throughput) of different Docker overlay networks. I do this by creating point-to-point connections between two hosts that are connected with a ...
4
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0answers
380 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 ...
2
votes
0answers
191 views

high CPU caused by pthread_cond_wait or nanosleep

First of all, I've searched in stackoverflow.com and googled, but no effective results are found. My question is: Why does pthread_cond_wait consume so much CPU? I don't think it's normal. My ...
2
votes
0answers
448 views

strace not showing anything for thread at 100% 'system' CPU

I'm having difficulty with my Python app going to 100% 'system' CPU time across multiple threads for up to 10+ seconds. My (limited) understanding is that 'system' CPU time is time spent in the kernel....
2
votes
0answers
181 views

Use of CPUQuota in systemd

I am trying to put a hard limit in CPU usage for a dd command . I have created the following unit file [Unit] Description=Virtual Distributed Ethernet [Service] ExecStart=/usr/bin/ddcommand ...
2
votes
0answers
222 views

Exchange 2010 on KVM - CPU usage reporting incorrectly

Good Morning, I have virtualized an exchange server using KVM (proxmox actually). It is Exchange 2010 SP3 running on server 2012 R2. KVM version 1.7.1. I am using the latest (0.1-74) virtio ...
2
votes
0answers
197 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 ...
2
votes
0answers
515 views

Ubuntu 13.04: apt-get and check-new-release CPU bound

I own a virtual server hosted by a provider. A few hours ago I was notified about the VM being CPU-bound. I couldn't log in and rebooted the server. After the boot, apt-get and check-new-release were ...
2
votes
0answers
278 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 ...
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vote
0answers
30 views

What's the impact of a high cpu steal time on XenServer's dom0?

From what I understand, cpu steal time is the CPU time that the VM kernel requested, but was denied by the hypervisor because it was serving another VM. From my experience, on a XenServer that has ...
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0answers
32 views

Can I limit wall clock time available for process on Solaris?

I would like (many) processes to be killed if still running after certain amount of time after execution. First I have thought that Solaris’ resource management is perfect tool for the job, as it ...
1
vote
0answers
73 views

High CPU Usage Top isn't Showing Processes

Hey I'm having a weird issue that I'm having some difficulty diagnosing. I have a VM that went down due to high CPU usage today. The websites on this VM are very low traffic, so I knew something ...
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0answers
138 views

determine if threads on a cpu are blocked? What are the causes of thread blocks?

The load-average reported by uptime command also displayed in top provides the the average run-queue length over time (1, 5 and 15 minutes) The run-queue length is the sum of the number of threads (...
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vote
0answers
337 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, ...
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0answers
241 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 ...
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0answers
87 views

'Nice' a process on Windows within EC2

I have a server in AWS/EC2 that is running a MSSQL database with a number of applications accessing it. On occasion, some Cobol batch processes are run against it also. For a while these have been ...
1
vote
0answers
307 views

Apache taking up a lot of CPU while running request-tracker4

I am trying out a request-tracker installation on an EC2 micro instance. The specs for the micro instance are as follows 1) Ubuntu 12.04 64bit, 613MB RAM, 8GB Hard Drive 2) Running request-tracker 4....
0
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0answers
14 views

CPU usage plot in graphana

I am trying to plot CPU usage in Graphana. Collectd gives metric to InfluxDB and I get metric from Influxdb into Graphana. I have tried taking derivative of last value but CPU is in negative. I want ...
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votes
0answers
22 views

Definition of CPU Ready for vmware ESXi host compared to CPU Ready for a guest?

We had a guest with poor performance. CPU Usage and CPU Ready for the guest was within normal range. For the host the CPU Usage were normal (70%), but the CPU Ready for the host seems to correlate ...
0
votes
0answers
23 views

Increase Memory and downgrade CPU on RAC 11.2.0.4 with 2 nodes

I have a RAC 11.2.0.4 on Linux x86 with 2 nodes with 3 databases with a total of 300GB(SGA and PGA) among all. What if a node has 512 of RAM and another node has 1 TB of RAM? What if one node has 2 ...
0
votes
0answers
36 views

Apache strace getsockname call is slow

While load testing I am getting almost 100% CPU usage by Apache processes. To find out the root cause I attached Apache process with strace and found slow calls. 11840 0.000063 accept4(3, {...
0
votes
0answers
140 views

Apache is using 100% CPU even with one user

Apache is using 100% CPU even with one user Apache (or should I say PHP through Apache?) is using 100% CPU for few seconds every time somebody search bugs at our bug tracker or just reload the search ...
0
votes
0answers
57 views

Why a moved process using cgclassify doesn't get correct cpu share

Here is my test case on an Ubunut 12.04. I have a simple code that uses all cores of a multicore system as follows: useAllCores.cpp int main(){ #pragma omp parallel for for (int i = 0; i < 50; ...
0
votes
0answers
72 views

Sudden increase in my CPU usage during random moments(Win Server 2012)

At random times, no matter if I am online or not I see that my server having increased Process usage spikes, as you can see in the picture: So I go inside the Dashboard on the Server Manager, look ...
0
votes
0answers
438 views

Is there a fix for Windows Server 2008 Datacenter (non R2) that will fix the same issue as 3050265 for R2

An issue I have had for a while with 2008 Server Datacenter and only recently with my R2 box is periodic CPU hogging by the wuauserv.exe service (Windows Update) which kills all my websites. I see ...
0
votes
0answers
380 views

Debian Jessie 8 idle on fresh install always a little too high, shows rcu_sched ksoftirqd kworker causing cpu load

Are the days of 0.0 cpu load on an "idle" server gone? I have another server (centos/redhat) 32GB ram that actually runs apache/MySQL/Lamp, mono, redmine/ruby, and other junk and its still shows me 0....
0
votes
0answers
73 views

VPS Server shoots to 900% CPU Utilisation for 10 to 15 minutes

I've just taken a VPS Server with Assured 1 core AMD opetron and burstable to 8 cores. RAM is 5 GB Average Usage so far been around 1 Cpu, but at a point of time - when checked through monitoring - ...
0
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0answers
208 views

Limited memory and CPU in the apache virtualhost

How can I limit the memory and CPU of each virtualhost on a apache running on CentOS?
0
votes
0answers
251 views

Php5-CGI is using 100% CPU on a single hit. How do I track down the culprit?

I ran into a strange problem with a Magento Store. The server was crashing when we hat a little traffic-peak so I checked what was going on. Using htop I found out that PHP5 CGI is using up to 100% ...
0
votes
0answers
67 views

php process eating CPU since October

Just noticed that my server CPU is being eaten by php at a regular rate of 50-60%. Worse, this is happening since last October but I can't really remember what I did then to cause. The CPU graph for ...
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0answers
121 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 ...
0
votes
0answers
542 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 ...
0
votes
0answers
107 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 (e.g....
0
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0answers
136 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 ...
0
votes
0answers
60 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 ...
0
votes
0answers
152 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
0answers
5 views

MySQL CPU overload and cant Use max Connection Mor Then 50

I have 8 Cores Server And 8 GB Ram And MySql 5.6 My.con File [mysqld] default-storage-engine=MyISAM interactive_timeout=300 key_cache_block_size=4096 max_heap_table_size=32M max_join_size=...
-2
votes
0answers
7 views

Server load balancing apache2 and python multiprocessing job

I have a VM that has two things to do, one is building (python script, multiprocessing) a key-value pairs and write results to redis within the same machine. Same machine also serves as my webserver,...