Questions tagged [ulimit]
The ulimit tag has no usage guidance.
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Why does my REST server response time increase when I have more connections
A trivial example shows that latency of responses grows rapidly with open connections. I don't understand why this is. How can I address this issue?
For example:
var express = require('express');
...
0
votes
1answer
168 views
Add LimitNOFILE on haproxy init script
I want to add open files limit to HAProxy 1.8 process to 1024576. But since I use version 1.8, I cannot add LimitNOFILE to init scripts, instead of systemd file. How can I add limitNOFILE to those ...
0
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1answer
39 views
debian and yum packages - is there a way we can set max mem % and CPU % limits?
Is there a hard limit we can set on Debian and RPM packages? My thought is to put 20% CPU, 20% Memory and 200 MB Disk Usage hard limits. So the package can play within those limits and not beyond that....
1
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0answers
225 views
change maximum number of open files for user on solaris 9
i need to change ulimit -n for the user permanently, on solaris 10 you can do
projadd -K "process.max-file-descriptor=(basic,8192,deny)" proj.files
but on solaris 9 projadd or projmod doesn't have -K ...
0
votes
1answer
409 views
ulimit for root keeps resetting
Using CentOS 6.6
In /etc/security/limits.conf I have set the following:
* soft nofile 65535
* hard nofile 65535
root soft nofile 65535
root hard nofile 65535
In etc/security/limits.d/90-nproc.conf ...
0
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1answer
670 views
Where does Linux get ulimit values for certain users?
I see that different users in my Debian system has different max open files limits. I read the post but would like to get some understanding of the details. I do not have any settings into /etc/...
5
votes
1answer
245 views
How to change stack depth limits in /etc/security/limits.d/ and have the changes apply to services at boot
My system
Series of Ubuntu 14.04.5 (x86_64) Servers, kept updated
My application required I increase stack depth for postgres
I created a file in /etc/security/limits.d/myapplication.conf
The ...
0
votes
1answer
148 views
seting rtprio limit in system without PAM
I have minimal linux system without PAM (custom complied linux based appliance) and I want to set system wide (all users) rtprio to 99.
My idea is to do this with help of sysctl. But looking on ...
0
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1answer
46 views
systemd DefaultLimitCPUSoft?
I discovered that on my Ubuntu 16.04 VPS a process is getting killed due to CPU usage.
Running ulimit -t shows 86400.
systemctl show | grep LimitCPU shows
DefaultLimitCPU=18446744073709551615
...
0
votes
1answer
718 views
RHEL setting a user specific max number of open files
I've set up below values in /etc/security/limits.conf in my RHEL machine.
* hard nofile 65535
@student hard nofile 100000
Is this the correct approach when setting a user specific max number of ...
0
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1answer
557 views
Where is default soft limit config file debian?
I have a process running as root that is capped to 1024 ( in reality lsof shows me up to 1031 for it) open files but I don't find the file to modify this limit.
Here is the output of cat /proc/PID/...
1
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1answer
712 views
Could not set limit for 'nofile' - “Operation not permitted” in a LXD unprivileged container
I am running a centos7 unprivileged LXD container on a ubuntu 17.04 host.
I have a problem setting ulimit for NOFILE inside the container, if it is running in unprivileged mode.
Bellow are the steps ...
0
votes
1answer
2k views
unable to set higher ulimit value for max open files
On Ubuntu 16.04 AWS system with 32 GB ram and 4 CPU, the following commands fail,
root@ip-10-0-0-189:/home/ubuntu# sysctl -w fs.file-max=10000000 **(ten million)**
fs.file-max = 10000000
root@ip-10-0-...
1
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1answer
488 views
How to set max file descriptors for a container?
I want to run elasticsearch in a container (namely nspawn) and it requires the number of max file descriptors to be higher than the default 1024.
This is done, in the container, in the systemd ...
0
votes
1answer
423 views
Ubuntu 16.10 Server MariaDB (MySql) open_file_limit won't go higher than 16364
I'm running on Ubuntu 16.10 (yakkety yak) with MariaDB 10.x and experience the very same issue as Ubuntu 16.04 Server MySql open_file_limit won't go higher than 65536 with one exception, my open ...
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0answers
200 views
ulimit not reflected for Jenkins master which is running on Red Hat
I already saw "ulimit not reflected for jenkins slave" and the steps did not work for me. Please, help. I am using Jenkins on Red Hat and I have the same problem.
I set ulimit to 99999 and when I ...
0
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0answers
73 views
Cannot login via ssh into CentOs machine after setting ulimit for open files to unlimited [duplicate]
I have set ulimit for open files on my centos machine by editing /etc/security/limits.conf post which I am unable to login into the machine.
This was the change made in /etc/security/limits.conf file....
0
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1answer
1k views
mpm_prefork:error (11)Resource temporarily unavailable: AH00159: fork: Unable to fork new process
After having some issues I have rebuilt my server on a new, clean Fedora 24 platform. It's a fairly busy server, and now when it starts up, I get a flood of these messges in apache's error_log:
[Thu ...
0
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0answers
223 views
xtrabackup: too many open files (more than 1048576)
When using xtrabackup to backup a mysql database with lots of tables, the proces fails with Error 24: ‘Too many open files’.
This is a FAQ on the Percona website: https://www.percona.com/doc/percona-...
0
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1answer
152 views
Linux - Open file inheritance
For testing, I've changed my global open file limit to 3000:
#sysctl -w fs.file-max=3000
fs.file-max = 3000
#cat /proc/sys/fs/file-nr
2016 0 3000
I've created some files:
i=1; while [ "$...
1
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0answers
225 views
Nginx at startup does not have fd limit set in /etc/security/limits.conf
I have the following configuration for increasing the number of file descriptors available to processes of all users.
cat /etc/security/limits.conf
* hard nofile 65536
* soft nofile 65536
When the ...
1
vote
0answers
146 views
Unable to access Ubuntu EC2 ssh, Connection to Server-IP Closed
My server was having error due to high traffic and it showed this message often when I access the website
Error: EMFILE: too many open files, open '/home/ubuntu/chat2/public/style.css'
at Error (...
16
votes
1answer
10k views
Ubuntu 16.04 Server MySql open_file_limit won't go higher than 65536
I'm running Ubuntu 16.04 Server on XenServer and I'm running into an issue with MySql's open file limit.
Here's what I've done so far:
sudo nano /etc/security/limits.conf (reference)
* soft nofile ...
0
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0answers
523 views
can't set nofile more than 65536
I use debian 8 x64.
I'm trying set max open file value to 2097152, but get only 65536.
root@server:/backups# sysctl fs.file-max
fs.file-max = 2097152
root@server:/etc/security# egrep -v '^#|^$' ...
6
votes
2answers
710 views
proc's limit and ulimit -f don't match
I have an issue where a process has a different max file size than the ulimit for a user. The log file for this process is basically not growing past 524288
proc:
less /proc/20238/limits
Limit ...
1
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0answers
324 views
Force nproc ulimit on non interactive user
I have a script that can be launched n times at the same time through php-fpm. php-fpm pool is set to run under a certain username and I want to limit the number of processes this username can launch.
...
3
votes
2answers
5k views
Getting Too many Open files error for Postgres
In Ubuntu 14.04 server on a JAVA application we are getting Too many Open files error for Postgres (Using Postgresql 9.5).
We set the following in /etc/security/limits.conf
* soft nofile 16384
* ...
1
vote
1answer
2k views
prlimit not found centos6.3
After finding out that ulimit -m no longer does anything on linux... I am now investigating the use of prlimit.
I have found that this is supposed to exists as part of util-linux / util-linux-ng, I ...
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2answers
4k views
How do ulimit settings impact Linux?
Lately, I had a EAGAIN error with some async code that made me take a closer look at ulimit settings. While I clearly understand certain limits, such as nofile, others are still quite confused to me.
...
2
votes
1answer
2k views
How do I increase the open file limit on Linux?
I am using CentOS 7. I found out that the current value can be seen using $ ulimit -a (look for open files).
Or just $ ulimit -n
Then I try to edit these limits by editing the file at
$ vim /etc/...
0
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0answers
1k views
File descriptor limit on CentOS 7
I am having hard time understanding resource limits (ulimit) with systemd. As I understand it, systemd brings some additional complexities to setting file descriptor limit.
/etc/security/limits.d/99-...
0
votes
1answer
1k views
increase max_connections in mysql on ubuntu wily
I have ubuntu wily installed on my server.
I'm trying to increase max_connections of mysql server to 1237
but when running mysql client and executing show variables like 'max_connections'; i get 214.
...
2
votes
1answer
1k views
How does nginx websocket proxy work?
I'm wondered about how nginx handles tons active websocket connections? There is a lot of limitations, like a number of open files, maximum of 65k TCP connections between IP <-> (IP, port) and so ...
0
votes
2answers
769 views
Can't raise nginx max files opened limit
I'm running Ubuntu Server. This is what I've done:
/etc/security/limits.conf:
* soft nofile 10240
* hard nofile 10240
And added in /etc/pam.d/...
4
votes
1answer
2k views
How to apply memory limits to all cron jobs?
On a shared server (Debian Jessie), there are some memory limits (and other limits, like number of processes) that apply for a group of users, configured in /etc/security/limits.conf.
It seems that ...
2
votes
2answers
1k views
Optimize Apache for high concurrent requests
I am running a Apache2 Ubuntu server which serves the API request from mobile apps.
Recently I am facing a bottleneck that when the request getting higher (more concurrent users), the request ...
1
vote
2answers
6k views
pam_limits: Operation not permitted for sshd
Debian 8.0, pam 1.1.8-3.1, sshd 1:6.7p1-5.
I'm trying to permanently increase the maximum number of open files.
In /etc/pam.d/ I've got:
/etc/pam.d# grep pam_limits.so *
atd:session required ...
1
vote
1answer
204 views
How does pam_limits decide on the default limits?
In a linux system that is using the pam_limits module, but has nothing configured in /etc/security/limits.conf (or /etc/security/limits.d/*) how does pam_limits decided on what limits to implement?
2
votes
1answer
233 views
Process has more open sockets than should be allowed by prlimit
Running debian jessie. The following is done as root to avoid any permissions issues.
First I find the pid of my program, then I check its open file limit to verify that it is set at 1024. But when I ...
2
votes
1answer
768 views
Forcing a user to use swap space after certain memory usage (using limits.conf?)
I have a backend app that is being used internally by developers hosted on our server, however, the app unfortunately requires the use of Passenger and Ruby, both of which are very memory-hungry.
I ...
3
votes
3answers
2k views
How to limit Apache sub-process memory usage? [duplicate]
— Yeah, just that simple question. It's too easy to consume a lot of RAM in brain-dead mod_XxX (say, mod_php) application, so I'm just wondering what does Apache allow to do as countermeasure.
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3answers
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How can I permanently set ulimit -n 8192 in Centos 7?
I would like to permanently set the open file limit for all users in Centos 7, but there seems to be a lot of conflicting information out there on the googles.
3
votes
0answers
492 views
“Open files” ulimit applied only when using 'su - userX' but not when I SSH into server
I'm running Ubuntu 12.04. My problem is that the ulimit values described in limits.conf are not being applied when I SSH into my server using a non root account. Either that or they are being applied ...
5
votes
1answer
432 views
Practical ulimits
One of the projects I'm working on is moving certain puppet-applied ulimit settings away from "that sounds about right" to dynamically allocated based on the environment. This is for single-...
13
votes
3answers
16k views
Ulimit file descriptor limits not being applied for particular process
I recently checked one of our redis processes to what ulimits where applied using:
cat /proc/<redis-pid>/limits
And was suprised to learn that is was at the low default value:
Limit ...
11
votes
2answers
28k views
nginx uLimit 'worker_connections exceed open file resource limit: 1024'
I keep getting this error in nginx/error.log and its driving me nuts:
8096 worker_connections exceed open file resource limit: 1024
I've tried everything I can think of and cant figure out what is ...
16
votes
2answers
56k views
Increasing ulimit on CentOS
We have a CentOS box that I'm trying to increase the max number of files that a user can have open. Currently when I run ulimit -Sn I get 1024 and ulimit -Hn gives 4096. I need that number up around ...
1
vote
1answer
5k views
How do I increase the curr_connections limit using memcache?
I am using a server with Centos 6.5 64 bits Kernel 2.6.32 and 64 GB RAM and 12 threads cores, and I cannot get increase the current connections used in memcache.
This is my STATS output:
# echo ...
9
votes
4answers
18k views
Why does redis report limit of 1024 files even after update to limits.conf?
I see this error at the top of my redis.log file:
Current maximum open files is 1024. maxclients has been reduced to
4064 to compensate for low ulimit.
I have followed these steps to the letter (...
1
vote
1answer
520 views
ulimit value when output is “hard” or “soft”
Can someone explain to me how can I determine actual values of for ulimit when the output of ulimit command is "hard" or "soft".
This is on AIX machine.
For example:
# ulimit -f
hard
And on another ...
