Soft and hard limits for nproc value in /etc/security/limits.conf file (Linux )
OS version : RHEL 6.5
Below is an excerpt from /etc/security/limits.conf file for OS User named appusr in our server
What will happen if appusr has already spawned 2047 processes and wants to spawn 2048th process ?
I just want to know the impact of breaching the soft limit of 2047
Hello!
How do make the limits.conf parameters work for a normal user. Ive changed
both the hard and soft parameter for the specific user. It used to be 4096 and i changed it to 16384. But when i use the ulimit -n, all i got is permissen denied.
Witch i can understand. But my question is? how... (1 Reply)
I have line in this file that says:
username - maxlogins 1
and user can login 2 times instad of one.
does enybody know why? and how can I fix that? (2 Replies)
HI,
To restrict the number of files and number of processes used the user we use the following configuration in the file /etc/security/limits.conf.
oracle soft nofile 65572
oracle hard nofile 65572
oracle soft noproc 16384
oracle soft noproc 16384
My question is what do the 'soft' and... (1 Reply)
Hi,
How can we set per user core file size, etc in solaris, i.e. I want solaris counterpart/equivalent of linux /etc/security/limits.conf.
TIA (0 Replies)
Hi there,
I am working on AIX and i dont have permission for /etc/security/limits file.
In the man page of ulimit it is mentioned that it will get the limitations for me from /etc/security/limits file.
the file permission for ulimit command is
-r-xr-xr-x 15 bin bin ... (6 Replies)
Hello all,
I'm running Oracle 10.2 on RHEL5. Current value of ulimit -n is set to a low value of 1024. I need to increase it to 65536 using the following procedure.
cat >> /etc/security/limits.conf <<EOF
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard... (3 Replies)
Hi there,
I am trying to set a ulimit max in the /etc/security/limits.conf against a NIS netgroup (which contains a whole bunch of users) instead of a local user or group.
so I have a NIS netgroup called +@myusers , none of whose users are defined locally on the box. I want to ensure that... (2 Replies)
Hi,
I would like to know, how can I set limits (noproc,fsize,core, data...) to users in solaris, i.e. I want solaris counterpart/equivalent of linux /etc/security/limits.conf
Thanks!! (0 Replies)
I've been looking online trying to find the correct value nice and priority can take in the limits.conf file. ON the man page it says;
Does this mean priority can be any negative number and any positive?
Then
Does this mean any number between -20 and 19 also what does the definition of nice... (13 Replies)
Hi Guys,
I'm trying to install Oracle Database on to Oracle Linux 7.6 but when
the database install package checks the OS set-up, it keeps on failing
on the soft limits for the stack. It's default value is 8192 but I'm trying
to set it to 10240.
This is what I added to... (2 Replies)
Discussion started by: ASGR
2 Replies
LEARN ABOUT V7
prlimit
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 lim-
its 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.
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)