Ubuntu :: Limit CPU To 75% Of Usage
Apr 1, 2011
Everytime CPU reaches around 85% of maximum it shuts down due to overheating. What I want to do is be able to throttle the cpu to 75% so it never goes above that. I don't want to just throttle individual programs which I think is what CPULimit does right? The fans are failing but I can't afford to get fixed. I just want to use it for email and web browsing usually.
I have cleaned dust out, use in a well ventilated room, use a cooling stand etc but still when CPU gets to approx 85% then whala it shuts itself down. Have been using with XP but just switched to Ubuntu and have only had it shut down once so far.
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Aug 18, 2010
I need to limit the ram usage under the below scenario,
" having 8GB of ram, need to limit the ram usage up to 4GB, thereafter must use swap only"
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Dec 13, 2010
I recently read a windows tip which read: - Windows allots 20% of the bandwidth by default for various services like Windows update, spyware checks etc. We can get hold of this bandwith by changing the values of limit reserve bandwidth under QOS packet scheduler. Now my questions: How to limit the bandwidth usage used by ubuntu updates in the above lines?
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Sep 21, 2009
I'm writing a shell script which aims to create a safe gtared (xxx.sql.gz) copy of MySQL databases.This script is planned to be Cron-Jobed.
Well, what I need to add to this shell, is something that limit CPU usage for the whole process (just in case if the database being generating is a huge one.)So, after few time of googling I found couple of solutions:
- Using cpulimit.
I tried to place the code in Position(1) and Position(2) but it didn't seem to be working fine.. Any idea about the right use?
And the other Solution is:- Using nice.
Well, assuming I named my shell script (sqlbacker)..
Finally, this is my first time I ever write a shell, so correct me if somewhere I made a mistake :-)
(The script itself works perfectly)
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Jan 26, 2010
There's a disfunctional process eating copious cpu time.Is there a way to effectively assign it a high nice value? I need to do this whenever it runs, for whatever reason, and I can't be bothered to track down all the scripts and scenarios that cause it to run and change the script to use nice. And I can't be bothered to manually run renice whenever I notice that it's running.
I want the OS to automatically assign a high nice value to this process, perhaps based on the processes name. Is this possible?Presumably, a cron job could run every 5 minutes and run "renice" on every process matching a given name, but I'm hoping for a solution with more finess.
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Apr 24, 2010
I've written a program for a class that my professor will be testing in various low memory environments to see how it behaves when the program runs out of memory. Is there a way I can simulate the execution in a low memory environment without creating a virtual machine?
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Jan 7, 2011
I have a webserver with a few users on and i wonder how i can limit the bandwith usage for each user on my server ?
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Dec 4, 2010
How can I limit printer usage by SAMBA server?
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Aug 13, 2011
I was looking into using control groups to limit the memory usage of each user on my CentOS system. I was told that this required me to recompile the kernel to have cgroup support. Is this true? Or is there a kernel module that will allow cgroups to work for users and groups on the system without kernel re-compile? Or, is there another way to limit the users memory usage? I have tried ulimit and it doesn't seem to work right.
I ask since this setup will be on a VPS system, that means to re-compile the kernel I need to use Xen instead of OpenVZ. Plus I have never in my life re-compiled the kernel, least of all with different modules ha ha ha so I would have to pay my NOC to do it. So if I don't HAVE to recompile the kernel to get cgroup support.
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Apr 5, 2011
Can I, with only the use of IPTABLES, limit the incoming bandwith for a protocol? We have for example servers that have a FTP and HTTP server running and whenever HTTP has a lot of connections open, the other uploads/downloads get a timeout. I know I can limit the number of connections but prefer to limit on protocol level. Is this possible using IPTABLES and if so, can someone indicate how to proceed or provide a link? If it's not possible can someone point me to the right tool for the job?
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Apr 29, 2011
I've noticed that "su" can be run from any user account so long as the user knows the root password.What if I want to limit the ability to "su" to only 1 user account? For example: Pretend my desktop has 4 different user accounts. Currently each user account could run "su" for root access if the person sitting in front of the screen knows the password.
1) Could I somehow make only 1 of the 4 user accounts able to "su" into root mode?
2) If yes, then would doing so have any side-effects?
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Dec 28, 2010
my secure log is flooding with these messages..
sudo: pam_limits(sudo:session): wrong limit value 'unlimited' for limit type 'hard'
Dec 28 22:42:29 yn54 sudo: pam_limits(sudo:session): wrong limit value 'unlimited' for limit type 'soft'
Dec 28 22:42:29 yn54 sudo: pam_limits(sudo:session): wrong limit value 'unlimited' for limit type 'hard'
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May 12, 2010
I have a VPS server with 512 MB memory. The php.ini is set so script memory limit = 16 MB. However, I have noticed in my top report, instances like the following:
Quote:
5484 coldclim 25 0 46476 32m 5920 R 0.0 6.4 0:00.93 php
The bold number of 6.4 is the % of sever memory this process is using. 6.4 % of 512 MB of memory is about 32 MB of memory, so it appears that this isn't being limited by php.ini. Am I correct? This leads to the next question: Is there some way to limit the amount of memory a single suphp process can use? (Basically, something like the setting in php.ini which limits suphp processes in the same way.)
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Mar 15, 2010
I was trying to get the status of memory usage and disk usage using sigar in windows and ubuntu. done this in windows by just copying the sigar library into jdk library. But i was unable to do so in ubuntu. I've copied the library to java-6-sun library but still can't run the program.
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Dec 10, 2010
I'm running into a problem where my system is running out of disk space on the root partition, but I can't figure out where the runaway usage is. I've had a stable system for a couple of years now, and it just ran out of space. I cleaned some files up to get the system workable again, but can't find the big usage area, and I'm getting conflicting results.For example, when I do a df it says I'm using 44GB out of 58 GB:
Code:
[root@Zion ~]# df -h
Filesystem Size Used Avail Use% Mounted on
[code]....
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Nov 15, 2010
Is there any way to monitor one process' CPU usage and RAM usage over time on Linux? I am trying to change to a cheaper VPS and need to work out what level of CPU and RAM I need!
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Mar 2, 2011
I have 2 directories in my home folder that I would like to set a size limit on. The directories are ~/backup and ~/temp. Is there an easy way to limit the size of a directory without having to make partitions?
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Jan 13, 2009
I am sure that all of us know the result of top command in linux. i want to get the value that the top command return as CPU usage, memory usage. so how do i do(programming relation)?
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Aug 6, 2010
I've come across a really strange issue with one of my RHEL servers. The "free" command shows that 7019 MB of memory are actually in use by my system, but when summing up the actual usage (or even virtual usage like the example below) it doesn't add up - the sum is far less than what is reported by "free":
Code:
[root@server1 ~]# free -m
total used free shared buffers cached
Mem: 12011 7946 4065 0 4 23
-/+ buffers/cache: 7919 4092
[code]....
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May 24, 2010
How do I find out the network usage ie the total amount of data is transferred in or out of my computer (openSUSE 11.2 and gnome) and keep a track of the total network usage?
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Jul 19, 2011
I am running 10.10 on a netbook (1.6Ghz Atom N270, 2GB RAM). Because it has limited resources, I am currently testing to see which apps I want to use.
Which should take more priority -- an application that uses less RAM or an application that uses less CPU?
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Jun 6, 2011
Is there a username limit (like 16 or 256 characters) for linux/ubuntu? If so, what is the limit?
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Apr 2, 2010
I have ubuntu server with PPTP on it. I need to limit single connection speed for ip 1 mbit/s, and mounthly traffic limit to 5 GB. How i can do this my task. I try to find somthing with ip tables, but can't find how to creat mounthly limits.PPTP do not have this option, maybe is some other, not hard for configure VPN server? Maybe someone make this task with iptables, and can give commands for limiting? Ofcorse VPN program with integrated accaunts and limits will be better.
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Apr 20, 2010
I know that most Windows OS's have a 2 Terabyte Hard drive limit..It's been making the rounds on forums and in print.Now the Chcken-Little sites state it as a universal limit:"limit to hard drive space reached... new software needed!"But the good reviews always mention Windows by name."32-bit Microsoft OS cannot handle drives larger than 2 Terabytes,you will need to upgrade to 64bit Microsoft OS"Does this 2 Terabyte Hard drive limit hold for Linux?
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Aug 25, 2010
Gparted: How do I get around this? It says to use logical partitions, but how?
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Sep 9, 2010
I'm running a
Release 10.04(lucid)
Kernel Linux 2.6.32-24-generic
GNOME 2.30.2
Using NVIDIA Driver Version 195.36.24 with two monitors 1280x1024 each in TwinView configuration My Pen tablet is ID 5543:0005 UC-Logic Technology Corp. Genius MousePen 8x6 Tablet, Wizardpen driver (not sure how to lookup its version) The tablet is currently working just fine except for this one thing I'm trying to fix: it now covers the entire 2560 pixel width of the desktop and 1024 pixel height. Given that the tablet itself has a 4x3 side ratio, it results in its horizontal resolution being half of the vertical one. Basically, when you use it to draw anything you always have to mentally correct what you do by limiting your horizontal movements to only half of vertical ones which makes drawing a (relatively) straight line an impossible task.
So, this got me thinking that I want to make sure the tablet only works on one of the two displays - the one I'd open Gimp and Inkscape on - the only two programs I ever use the tablet with. However, when I look at the calibration settings of the tablet itself, it only allows me to limit the area of the tablet I want to be sensitive, not the area of display. I cannot find any such settings in NVIDIA X Server Settings either although I think this is where it might have been. So, does anyone know how to leave the same size of the tablet drawing area but make it move the cursor only on one particular monitor in TwinView configuration?
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Nov 4, 2010
I need to adjust what exactly ufw LIMIT port# does.I like the fact that the port is getting limited, but ufw overdoes it a bit. Is there a config file somewhere I can edit?
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Jan 8, 2011
I currently use 4 keyboard maps in my session (Russian, Ukrainian, Polish and French). I'd like to use one more : Sweddish, but it seems that I can't have more than 4. Does anybody knows a way to bypass this limit?
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Apr 25, 2011
How do I limit the max login attempts in the sshd_config file? I found a way to do it on Google some time back but I can't find it now. I have Denyhost already, but I really wanna do the "MAx Login Attempts" what ever it was that I was able to do in the config file.
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May 27, 2011
I am trying to add a printer to the network at home, but only want certain users to be able to access it. When I try to setup the users that have access in the printer properties it wont even allow me to pick users.What do I need to do to add the users into the list?
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