PRLIMIT(1) manual page
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prlimit - get and set process resource limits
prlimit [options]
[--resource[=limits] [--pid PID]
prlimit [options] [--resource[=limits] command
[argument...]
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.
-
- -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.
- -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.
- 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
umlimited.
- prlimit --cpu=10 sort -u hugefile
- Set both the soft and hard CPU
time limit to ten seconds and run ’sort’.
prlimit(2)
, ulimit(1)
The prlimit system call is supported since Linux 2.6.36, older kernels
will break this program.
Davidlohr Bueso <dave@gnu.org> - In memory of Dennis M. Ritchie.
The prlimit command is part of the util-linux package and is
available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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