prlimit(1)




PRLIMIT(1)                       User Commands                      PRLIMIT(1)

NAME
       prlimit - get and set process resource limits

SYNOPSIS
       prlimit [options] [--resource[=limits] [--pid PID]

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

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 val-
       ues 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.

GENERAL OPTIONS
       -h, --help
              Display help text and exit.

       --noheadings
              Do not print a header line.

       -o, --output list
              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, --pid
              Specify the process id; if none is given,  the  running  process
              will be used.

       --raw  Use the raw output format.

       --verbose
              Verbose mode.

       -V, --version
              Display version information and exit.

RESOURCE OPTIONS
       -c, --core[=limits]
              Maximum size of a core file.

       -d, --data[=limits]
              Maximum data size.

       -e, --nice[=limits]
              Maximum nice priority allowed to raise.

       -f, --fsize[=limits]
              Maximum file size.

       -i, --sigpending[=limits]
              Maximum number of pending signals.

       -l, --memlock[=limits]
              Maximum locked-in-memory address space.

       -m, --rss[=limits]
              Maximum Resident Set Size (RSS).

       -n, --nofile[=limits]
              Maximum number of open files.

       -q, --msgqueue[=limits]
              Maximum number of bytes in POSIX message queues.

       -r, --rtprio[=limits]
              Maximum real-time priority.

       -s, --stack[=limits]
              Maximum size of the stack.

       -t, --cpu[=limits]
              CPU time, in seconds.

       -u, --nproc[=limits]
              Maximum number of processes.

       -v, --as[=limits]
              Address space limit.

       -x, --locks[=limits]
              Maximum number of file locks held.

       -y, --rttime[=limits]
              Timeout for real-time tasks.

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'.

SEE ALSO
       ulimit(1), prlimit(2)

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

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

AVAILABILITY
       The  prlimit command is part of the util-linux package and is available
       from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                         July 2014                        PRLIMIT(1)

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