How to limit heap size on Linux

Hello,

How to limit the maximum heap size of headless server on Linux? I'm planning to run multiple server instances on a single host. I want to specify upper limit like JVM's -Xmx option. I found a similar question but there is no answer.

Thanks

 

Use ulimit command. It can limit memory for any process under the Linux

 

Thank you for your reply. I've found that ulimit -m does not work

% ulimit -m 0
% ./Minimum.x86_64 # unity game executable
(It works normally)

and ulimit -v is not useful because it reserves large virtual address space.

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15282 izawat 20 0 1964000 64640 28264 R 3.0 0.8 0:01.04 ./Minimum.x86_64

% ulimit -v 1000000 # 1GB
% ./Minimum.x86_64
Set current directory to /home/izawat/Minimum
(snip)
[1] 15387 segmentation fault (core dumped) ./Minimum.x86_64

Finally, I could set memory limit by using cgroups. But I don't know whether the mono runtime knows the memory limit or not. I'm afraid that the game will be killed before invoking GC.

 

Izawat, could you share the commands that you used to accomplish that with cgroups?
That's exactly what I need to fix issues with getting Cities Skylines to load on my machine (also an Unity game)
Screenshots here:
https://imgur.com/a/x7LkOvV
This has been driving me insane!
I'm having more problems with memory and crashes in a new machine than I ever had in my older one.