prlimit

(1)

get and set process resource limits

User commands 23 optionsutil-linux 2.41-5

prlimit [options] [--resource[=limits]] [--pid PID] prlimit [options] [--resource[=limits]] command [argument...]

Options

--noheadings

Do not print a header line.

-o--outputlist

Define the output columns to use. If no output arrangement is specified, then a default set is used. Use --help to get a list of all supported columns.

-p--pidPID

Specify the process ID. Without this option (and without a command), the running process will be used.

--raw

Use the raw output format.

--verbose

Verbose mode.

-h--help

Display help text and exit.

-V--version

Display version and exit.

-c--corelimits

Maximum size of a core file.

-d--datalimits

Maximum data size.

-e--nicelimits

Maximum nice priority allowed to raise.

-f--fsizelimits

Maximum file size.

-i--sigpendinglimits

Maximum number of pending signals.

-l--memlocklimits

Maximum locked-in-memory address space.

-m--rsslimits

Maximum Resident Set Size (RSS).

-n--nofilelimits

Maximum number of open files.

-q--msgqueuelimits

Maximum number of bytes in POSIX message queues.

-r--rtpriolimits

Maximum real-time priority.

-s--stacklimits

Maximum size of the stack.

-t--cpulimits

CPU time, in seconds.

-u--nproclimits

Maximum number of processes.

-v--aslimits

Address space limit.

-x--lockslimits

Maximum number of file locks held.

-y--rttimelimits

Timeout for real-time tasks.

DESCRIPTION

Given a process ID and one or more resources, prlimit tries to retrieve and/or modify the limits.

When command is given, prlimit will run this command with the given arguments.

The limits parameter is composed of a soft and a hard value, separated by a colon (:), in order to modify the existing values. If no limits are given, prlimit will display the current values. If one of the values is not given, then the existing one will be used. To specify the unlimited or infinity limit (RLIM_INFINITY), the -1 or 'unlimited' string can be passed.

Because of the nature of limits, the soft limit must be lower or equal to the high limit (also called the ceiling). To see all available resource limits, refer to the RESOURCE OPTIONS section.

•soft:hard Specify both limits.

•soft: Specify only the soft limit.

•:hard Specify only the hard limit.

•value Specify both limits to the same value.

NOTES

The prlimit(2) system call is supported since Linux 2.6.36, older kernels will break this program.

EXAMPLES

prlimit --pid 13134

Display limit values for all current resources.

prlimit --pid 13134 --rss --nofile=1024:4095

Display the limits of the RSS, and set the soft and hard limits for the number of open files to 1024 and 4095, respectively.

prlimit --pid 13134 --nproc=512:

Modify only the soft limit for the number of processes.

prlimit --pid $$ --nproc=unlimited

Set for the current process both the soft and ceiling values for the number of processes to unlimited.

prlimit --cpu=10 sort -u hugefile

Set both the soft and hard CPU time limit to ten seconds and run sort(1).

AUTHORS

Davidlohr Bueso dave@gnu.org - In memory of Dennis M. Ritchie.

REPORTING BUGS

For bug reports, use the issue tracker https://github.com/util-linux/util-linux/issues.

AVAILABILITY

The prlimit command is part of the util-linux package which can be downloaded from Linux Kernel Archive https://www.kernel.org/pub/linux/utils/util-linux/.