03-14-2016
Max Open File Limit
Ubuntu users,
I am configuring an Ubuntu 14.04 server as a load injector.
I have appended the hard and soft limits to /etc/security/limits.conf for any user (apart from root):
* hard nofile 65536
* soft nofile 65536
I am seeing the figure 65536 in numerous resources, but I am not sure why?
I am guessing that the system wide-limit should be larger than the user limit, so I have set this to ‘fs.file-max = 75000' in /etc/sysctl.conf. Is this correct?
Do I also need to set pam_limits on Debian based distros and where does this fit in?
And what limits does ‘ulimit -n' actually retrieve?
Many Thanks
Aidy
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I have set the maximum no of file descriptors open in a process to the value 8192 using the following lines
set rlim_fd_max=8192
set rlim_fd_cur=8192
in the /etc/system file.
I rebooted the machine and the command ulimit -n / -Hn both display the limits as 8192. However when I run my... (2 Replies)
Discussion started by: lakshmankumar12
2 Replies
2. Shell Programming and Scripting
How to set the max limit for socket opening TCL
Thanks,
Ajay (1 Reply)
Discussion started by: aju_kup
1 Replies
3. SuSE
I'm trying to set the open files value to 4000 on a SLES 9 system.
Current values:ulimit -n
1024
I can set it using this:ulimit -n 4000
ulimit -n
4000
But this obviously sets it only for the shell session where I run the command to set it. I want to set this to 4000 for all time.
... (3 Replies)
Discussion started by: blowtorch
3 Replies
4. Programming
Hii can anyone pls tell how to limit the max no of message in a posix message queue. I have made changes in proc/sys/fs/mqueue/msg_max
But still whenever i try to read the value of max. message in the queue using attr.mq_curmsgs (where struct mq_attr attr) its giving the default value as 10.... (0 Replies)
Discussion started by: mohit3884
0 Replies
5. Shell Programming and Scripting
Hi,
Please provide your inputs..
# define PATH_MAX 1023 /* max number of characters in a pathname (not including terminating null) */
Could you please let me know how to create directory name(or pathname) with above PATH_MAX length in korn shell scripting..
... (9 Replies)
Discussion started by: mansa
9 Replies
6. Linux
Oct 31 00:00:02 FIREWALL003 syslogd 1.4.1: restart.
Oct 31 00:00:02 FIREWALL003 syslogd 1.4.1: restart.
Oct 31 00:00:02 FIREWALL003 syslogd 1.4.1: restart.
Oct 31 02:37:09 FIREWALL003 kernel: srmLINUX: segfault at 00000000303a3031 rip 000000000026fe54 rsp 00000000ffbd05b8 error 4
Oct 31... (5 Replies)
Discussion started by: itik
5 Replies
7. HP-UX
hi,
iam getting error when i assign a variable to an array of more that 315 character in length
set -A array <variable>
<variable> value is 000001 000002 and up to 000045
it is giving error as
"The specified subscript cannot be greater than 1024."
can any one help me to solve this (2 Replies)
Discussion started by: gomathi
2 Replies
8. SCO
Hi
How to increase maximum number of open file in "sco xenix binary" running in "sco unix openserver 5.0.7" ?
I have changed "NOFILES" kernel parameter to 512, but xenix binray can't open more than 60.
tnx (4 Replies)
Discussion started by: javad1_maroofi
4 Replies
9. UNIX for Dummies Questions & Answers
I wrote a perl program that simultaneously reads in data from 691 tar.gz files using zcat. I can run one instance of the program without any issues and the memory and swap sizes are negligible. However, when I attempt to run more than 1 I start to get fork: resource unavailable messages. Are... (6 Replies)
Discussion started by: aquinom85
6 Replies
10. Solaris
Hello all,
I have been tasked with finding the current open file descriptors versus the limit set. In Linux, this can be done like so:
cat /proc/sys/fs/file-nr
3391 969 52427
| | |
| | |
| | maximum open file descriptors
| total free allocated... (2 Replies)
Discussion started by: LinuxRacr
2 Replies
LEARN ABOUT CENTOS
prlimit
PRLIMIT(1) User Commands PRLIMIT(1)
NAME
prlimit - get and set a process resource limits.
SYNOPSIS
prlimit [options] [--{resource_name}[=limits] [--pid PID]
prlimit [options] [--{resource_name}[=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 format is composed by a soft and a hard (ceiling) value, separated by a semicolon (:), in order to modify the existing value(s).
If no limits are used, prlimit will only display the current values. If one of the values is not used, 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 value must be lower or equal to the high limit. To see all the 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 soft and hard limits to the same value
GENERAL OPTIONS
-p, --pid
Specify the process id, if none is given, it will use the running process.
-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 list of all
supported columns.
-V, --version
Output version information and exit.
--verbose
Verbose mode.
--raw Use the raw output format.
--noheadings
Do not print a header line.
-h, --help
Print a help text 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 the number of processes for both soft and ceiling values to unlimited.
prlimit --cpu=10 sort -u hugefile
Set the soft and hard CPU time limit and run 'sort'.
SEE ALSO
prlimit(2), ulimit(1)
NOTES
The prlimit system call is supported since Linux 2.6.36, previous 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 ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux October 2011 PRLIMIT(1)