Unix and Linux Stack Exchange
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Questions tagged [limit]

Limiting the usage of a resource (memory, disk space, CPU time, open files, network bandwidth, …) by a process or a group of processes.

A limit is a restriction on a program that prevents it from using more than a set amount of resources, such as memory, disk space, CPU time, open files, network bandwidth, etc.

The ulimit built-in of POSIX shells lets a user set limits on the shell process and the programs that it subsequently invokes. The set of supported resources varies depending on the shell and the operating system.

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Difference between ulimit -n and /proc/$PID/limits

In Linux, there is open file limit. I can use ulimit -n to see open file limit, which is 1024 default. Then I also can see per process open file soft/hard limit by looking at /proc/$PID/limits. I see soft = 1024 and hard = 4096. I am wondering what…
sdeLevelNegativeTwo
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How to limit the running time of a program?

Sometimes when I write code I found that I made a stupid mistake and some loop takes almost all CPU time forever. Is there a way the running time of a program for example to 10 seconds in bash?
beginner
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Is it possible to impose a minimum niceness on a specific user?

Is it possible to limit a specific user's processes to always run with a niceness of at least 15, say?
kjo
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"Too Many Open Files" for Apache and java/tomcat. How to set per-process limits?

This problem has now appeared twice on my production Ubuntu machine running both a node server (tiny) and a Spring Boot Java server (the workhorse). The first time it happened, grinding my server to a halt I found the file /proc/sys/fs/file-max had…
crowmagnumb
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