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Questions tagged [cpu-usage]

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

685 questions
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Do CPU credits exist for c5d.large instances? And if not, why not?

I've been paranoid that the websocket feed I was listening to on a t3.micro instance was being inhibited by cpu steal time from other instances under the same hypervisor. So I switched over to a c5d.large instance and definitely noticed less…
randy
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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 (KB2800231) from Microsoft. However, the only listed…
Larry Hannah
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Very uneven CPU utilization with SQL Server 2012 on 2 processor computer with 16 cores / processor

After installing SQL Server Enterprise 2012 with the Server + Cal license model, on a computer with 2 processors each with 16 cores (and no hyperthreading involved) and putting the server under extremely heavy load the 16 cores on the first…
cooplarsh
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How can I monitor CPU usage and processes on Windows Server 2012 as a service over a 24 hour period?

We have a long running performant operation that runs for 6 hours. When it was last ran, something happened for 5 minutes where its performance dropped dramatically and caused a few timeouts, in the middle of the night. I suspect some other process…
NibblyPig
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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 Docker overlay network and then run iperf inside…
arne.z
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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.
esx_admin18
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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 vMA host), and one is more resource intensive (a…
Martin
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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 same time, those processes will use 25%, 25%, and…
mart1n
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Why do user and system cpu in cpuacct.stat not add up to cpuacct.usage?

Question relates to Linux cgroups cpu accounting. I noticed this at the container level, but it persists up to top level. For instance: # cat /sys/fs/cgroup/cpu/cpuacct.stat /sys/fs/cgroup/cpu/cpuacct.usage user 34618 system 18038 743932863030 The…
Bryan
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How is RAM and CPU allocated if no manual changes are applied to an Ubuntu Server

We have an Ubuntu Server (16.04) running R-Studio Server where we do statistical simulations. Those simulations are sometimes heavy on RAM and CPU so i would like to know how memory and RAM is allocated by the core if e.g. two users are logged in…
joaoal
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How to compare mainframe CPU performance?

I am working with an application that runs on tomcat in OMVS. It run terribly on one mainframe, and adequately another another. Is there a way I can compare the CPU of the two mainframes as a reference? I tried: /d m=cpu I didn't find the results…
GC_
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How to find what processes were running at a time in the past?

I am asked to investigate a high CPU usage alert which occurred this morning. I used sar -p and saw the high CPU usage showing up at that time Next I used ps -eo pcpu,pid,user,args | sort -r -k1 | less to list the top 10 memory hogs at this hour Now…
juniorbansal
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CPU overloaded but no proccess is using more than 1%

I am monitoring a Cpanel (centos) server which have a 2-core CPU (4 virtual CPU cores) and it seems to be overloaded because I got this values using top: load average: 11.80, 13.30, 13.02 Cpu(s): 42.2%us, 11.7%sy, 0.0%ni, 35.6%id, 10.1%wa, 0.1%hi,…
Pablo
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cpufreq-info differs from /proc/cpuinfo?

I have a server and I want to ensure it's always running at maximum speed, never in energy-saving mode. I've tried a few strategies (aside from rebooting and changing the setting in the bios, which I would have to do for a few hundred servers) but…
Evan
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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 the server is consuming more and more CPU until it…
filo891
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