Ubuntu – How to limit resource usage for a given process

configurationcpuiomemory usageprocess

I have a process for an application which needs to run, but ends up using far too much IO usage for what it does. And really crashes my computer, making it impossible to do anything else whilst it is running.

So I was wondering if there is a way to limit IO usage, RAM and CPU for a given process? And its sub-processes of course.

This is on my Ubuntu 18.04 LTS system.

Best Answer

You should use a combination of all cgexec, cpulimit and ionice:

Limit RAM and SWAP:
```
sudo cgcreate -g memory:/szMyGroup
echo $(( 512 * 1024 * 1024 )) | sudo tee /sys/fs/cgroup/memory/szMyGroup/memory.limit_in_bytes
echo $(( 1024 * 1024 * 1024 ))  | sudo tee /sys/fs/cgroup/memory/szMyGroup/memory.memsw.limit_in_bytes
```
The above commands create a control group named szMyGroup (E.g. in your case group-great-uncle), set a cap to the processes run under szMyGroup up to 512 MB of physical memory and up to 1024 MB of swap and then:
```
sudo cgexec -g memory:szMyGroup szMyProgram
```
which will run your program under the szMyGroup control group, thus ensuring they adhere to the limits
limit the disk IO:
```
sudo ionice --class 3 --pid $(pgrep -f szMyProgram)
```
The above command uses pgrep with reusing parts of the current command-line to limit its disk access to only use the disk when no other program is using it
Limit the CPU:
```
sudo cpulimit --limit=25 --pid=!#:4
```
The program's CPU is now limited to 25% of maximum

If the program does not use a lot of CPU to begin with, lower the value of cpulimit to half or less of what it currently uses.

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According to previous posts here, a known bug in the Linux kernel is leading to overheating issues: Heat issues on 11.10 beta?

Recent releases (11.04 also) have had a similar problem. A workaround for the Linux 3.0 kernel has been suggested:

http://www.techytalk.info/linux-kernel-2-6-38-2-6-39-power-regression-workaround/

I've heard that these issues were supposed to be fixed completely in Linux 3.1. However, Ubuntu 11.10 uses the 3.0 kernel, so the above workaround should still be relevant. According to Phoronix, the power consumption of Ubuntu 11.10 is up as much as 50%:

http://www.phoronix.com/scan.php?page=news_item&px=OTg5Mg

Ubuntu – How to Limit the CPU usage for a process and its children whether there is another process demanding resources or not

This link may help Set maximum CPU consumption in percentage by any process searched by : MrSeed

this script may help too , any any one wants to enter suggestions on this script to enhance it , it will be my pleasure

       #!/bin/bash -xv

read -p "Which program u want to limit its processes?" ProgrameName
read -p "Which limitation percentage u want for it ?" limitationPercentage  
read -p "Period to be sleep " sleepInterval 
dataFile="/home/ahmedubuntu/Desktop/.file.txt"
separator="######"
trap "echo \"\" > $dataFile"  SIGINT SIGTERM SIGHUP
########################################################
if [ -e $dataFile ]; then
  echo "File $dataFile already exists!"
  echo -e "" > $dataFile
else
  echo >> $dataFile
fi 
echo -e "$ProgrameName \n $limitationPercentage \n" >> $dataFile
getAllPIDRunUnderThisProgram=$( ps -e | grep "$ProgrameName" | awk '{print $1;}')
echo -e "${getAllPIDRunUnderThisProgram[@]}  \n $separator \n" >> $dataFile
for i in $getAllPIDRunUnderThisProgram
   do
    gnomeTab+=( --tab -e "cpulimit -p $i -l $limitationPercentage ")  
   done
gnome-terminal "${gnomeTab[@]}"
#echo gnome-terminal "${gnomeTab[@]}"
########################################################
while sleep $sleepInterval
do
i=0
while read line
do
if [ -n "$line" ] && ["$line" != "separator"] 
then
programeNameAndPID[i]=$line
((i++))
elif [["$line" == "separator"]] ; then
getAllPIDRunUnderThisProgram=$( ps -e | grep "$programeNameAndPID[0]" | awk '{print $1;}')
if [${#getAllPIDRunUnderThisProgram[*]} -gt ${#programeNameAndPID[*]}-2  ]
then
unset gnomeTab
newProcessNumber=${#getAllPIDRunUnderThisProgram[*]}-${#programeNameAndPID[*]}-2
index=${#getAllPIDRunUnderThisProgram[*]}-1
for (( c=$newProcessNumber ; c > 0 ; c-- ))
do
gnomeTab+=( --tab -e "cpulimit -p $getAllPIDRunUnderThisProgram[$index] -l $programeNameAndPID[1] ") 
((index--)) 
done
gnome-terminal "${gnomeTab[@]}"
fi
i=0
unset programeNameAndPID
fi
done < $dataFile
done

and by adding nice -10 will work well with no need to sudo and password

Best Answer

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