Questions tagged [ulimit]
All about resource limits that can be set with the ulimit command
161
questions
0
votes
0answers
38 views
Where is the memlock limit in an LXC container from?
In the host shell:
$ ulimit -l
65536
$ vagrant ssh --command='ulimit -l'
64
What could cause this difference?
Dead ends so far:
On the host and the guest /etc/security/limits.conf has no entries ...
0
votes
0answers
17 views
How to check the password age of Users from Active Directory
I am working on Linux (RHEL and SLES) and am not a Linux administrator and don't have access to a Linux administrator.
The users are from Active Directory hence I am not able to
find/reset the ...
0
votes
0answers
31 views
How can df report different information depending in it's target path?
Example:
root@myinstance:/my/instance/path# df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/mapper/hdd-place 13T 899G 12T 8% /run/iss
...
root@myinstance:/my/instance/...
1
vote
3answers
210 views
chromium browser: exceed data ulimit
I have set ulimit in /etc/security/limits.conf. When I log in into my desktop environment as user testuser normally (using slim login manager), everything works fine.
When I log in as user testuser ...
1
vote
2answers
34 views
Recommended ulimit values for Centos7
Trying to configure PHP to perform a core dump, I executed the following:
[root@myserver ~]# echo '/tmp/core-%e.%p' > /proc/sys/kernel/core_pattern
[root@myserver ~]# echo 0 > /proc/sys/kernel/...
0
votes
1answer
58 views
increase maximum number of open files (ulimit)
I need to increase the files limit on my system (for running on large files in Spark).
The release of linux on my server is:
Redhat Release: Red Hat Enterprise Linux Server release 7.6 (Maipo)
I ...
0
votes
0answers
43 views
Limit file size per user
I tried to limit file size per user. I use limits.conf with fsize size config but its limit when user tried to make files from shell !
I want to limit from FTP , FileManager , PHP ,... files owners ...
2
votes
1answer
292 views
ulimit for stack size - per process or per thread limit?
So we have a program on Solaris which was running out of stack space.
While investigating this, I had a brief look at what ulimit was for the stack:
user@solaris-box:~$ ulimit -a
...
stack size ...
1
vote
1answer
47 views
Determining source of ulimit change
I have a server built with AWS OpsWOrks, so everything is in configuration. There is a process whose ulimit is set to 4096, as checked from /proc/$PID/limits. This process runs as root. I ran the ...
1
vote
1answer
33 views
Can I use ulimit to prevent a system from overheating and rebooting?
I was just informed about the joys of ulimit.
And it got me thinking...if I have a system with an old processor that keeps overheating, and let's say for sake of example; no other hardware that I ...
0
votes
0answers
155 views
Can't use remote server because too many open files in system
I'm running some python programs in the background of a remote Ubuntu machine. The program opens too many files that exceed the system limit.
I want to ssh to the remote server now, but I can't ...
0
votes
1answer
43 views
Difference between pid_max/ulimit. How to create fake processes?
I am trying to learn the nuances between pid_max and setting user limits through ulimit. My understanding is that, no matter how high you set the user limits (for example setting user max processes to ...
0
votes
0answers
67 views
kernel.pid_max, kernel.threads-max, and ulimit -u
What are the differences of this? I am so confused.
1) If kernel.pid_max is the maximum number of PID that kernel can assign, then why is there a kernel.threads-max if there is already a kernel....
0
votes
0answers
49 views
Why don't my audio.conf settings cause me to get an unlimited value for ulimit -l?
I am attempting to set the relevant resource limits for some low-latency audio work. I have created an audio group, and I believe that I am in that group based on the following:
~$ groups
kevin adm ...
0
votes
1answer
174 views
system MemoryMax by percentage not working?
I am trying to configure my .service file to limit how much memory a given service can use up before being terminated, by percentage of system memory (10% as an upper limit in this case):
[Unit]
...
1
vote
1answer
247 views
Change the resource limits (ulimit / rlimit) of a running process
I have a long-running process that is hitting a resource limit, such as the maximum number of open files.
I don't want to kill it.
Usually, you'd do:
(stop service)
ulimit -n <new limit>
(...
0
votes
1answer
64 views
ulimit - one service affects another
We are hosting 2 services on our RHEL 7.4 server: Jupyterlab and RStudio. Jupyterlab sessions of individual users tend to open a lot of files:
# lsof|grep e613664|wc -l
31581
Our problem is that the ...
0
votes
0answers
154 views
How to reset ulimit -s
I was playing around the stack size and set ulimit -s 1. After that I could not re-set it to 8192 and
ulimit -s 8192
bash: ulimit: stack size: cannot modify limit: Operation not permitted
while
...
1
vote
0answers
23 views
linux mint ulimit configuration
In my Linux Mint desktop, ulimit -Hs shows values greater than fs.file-max. As far as I know it should be smaller values than the system-wide settings. Is this OK for Debian-based systems or do I have ...
-1
votes
1answer
373 views
hive + what is the meaning of nofile and nproc
regarding to hive in hadoop cluster
what is the meaning of the following
hive - nofile 30000
hive - nproc 18000
the file:
more /etc/security/limits.d/hive.conf
# Licensed to the Apache ...
4
votes
1answer
2k views
'pthread_create: Resource temporarily unavailable' when running multiple docker instances
TLDR
When spinning up multiple docker containers in which I run npm ci, I start getting pthread_create: Resource temporarily unavailable errors (less than 5 docker containers can run fine). I deduce ...
0
votes
1answer
24 views
Setting soft limit above hard does not fail in terms of exit code?
root@Andromeda:/# ulimit -n -S
2048
root@Andromeda:/# ulimit -n -H
2048
root@Andromeda:/# ulimit -n -S 4096
2048
root@Andromeda:/# echo $?
0
Failure to set soft limit above the hard one makes sense.
...
0
votes
0answers
125 views
No locks available
I am using ssh logging on a remote server and ran a parallel computing application. I use htop to monitor the CPU usage. But after running a long time, htop exit and shows:
htop: too may open files ...
0
votes
1answer
1k views
Maximum value for /proc/sys/fs/file-max
Today my server crashed with Too many open files in system: but I already have high values, what is a maximum value for this?
I feel like there aren't good results on google for this, explaining ...
1
vote
0answers
64 views
Limit memory usage for a single Linux process with only a function?
This is a shell script with a function timeout() to limit the CPU time usage for a single process. Is it possible to limit memory usage for a single Linux process with a similar function?
#!/bin/bash
...
2
votes
1answer
170 views
shellcheck: “In POSIX sh, ulimit -H is not supported”
I am using shellcheck to fix warnings in a sh script. The script checks for the hard fd limit with:
ulimit -H -n
It sets the soft fd limit with:
ulimit -n "$MAX_FD"
This generates the shellcheck ...
0
votes
1answer
698 views
Open file limits not increased for redis user despite change in /etc/security/limits.conf
I got
ERR max number of clients reached
from my redis server so I decidied to increase the allowed max client connections in its configuration. This also requires according to the documentation, ...
1
vote
2answers
78 views
Prevent the machine being slowed down by running out of memory
My software runs a command that looks something like:
find | xargs do a potentially memory hungry job
The problem is that sometimes a potentially memory hungry job gets too hungry, the system gets ...
2
votes
2answers
172 views
Who would win, RLIMIT_NPROC or user namespaces?
Depending on configuration, unprivileged (non-root) processes can create a user namespace.
RLIMIT_NPROC limits the number of processes per user.
If I enter a user namespace, can I create processes ...
2
votes
0answers
240 views
Restart a process if cpu usage is more than 90% for more than a 60sec
Normally one of my systemd services will take about 0...5% cpu Usage. In some cases it can reach up to 100% but only for some seconds. If the Service "crashes" it takes up to 100% continuously.
So I ...
0
votes
1answer
310 views
What level is the value `ulimit -n`mean? user level or process level? [duplicate]
I want to increase the ulimit -n value,so I add
* soft nofile 20000
* hard nofile 20000
in the /etc/security/limits.conf file, but there is a question confuse me all the time.
what ...
3
votes
0answers
72 views
What are the differences between process data segment and resident set size? [duplicate]
I searched how to limit memory usage for a single process and found 3 results,ulimit -d, -m and -v, which stand for data seg size(process's data segment), max memory size(resident set size) and ...
1
vote
1answer
90 views
mixed results from the same command (related to ARG_MAX) [duplicate]
I'm asking a question based on this link How to cause "Argument list too long" error?
From the thread, I'm seeing the equivalent error, if i'm running this:
>/bin/echo `perl -e 'print "...
0
votes
1answer
2k views
Why ulimit -n modifies hard limit
Checking open files (soft) limit on current shell
/home/pkaramol
$ ulimit -n
1024
Checking hard limit
/home/pkaramol
$ ulimit -n -H
1048576
Setting (soft) limit to hard limit value and verifying ...
0
votes
1answer
859 views
ulimit configuration explanation of different types
I am setting several ulimits (system is rhel 7.5) and i can't find any clarification on the values of type. From inside the /etc/security/limits.conf i get that type can get two values while in the ...
55
votes
3answers
12k views
Why can't I crash my system with a fork bomb?
Recently I've been digging up information about processes in GNU/Linux and I met the infamous fork bomb :
:(){ : | :& }; :
Theoretically, it is supposed to duplicate itself infinitely until the ...
-1
votes
2answers
559 views
Beyond ulimit limit [duplicate]
I execute below command:
ulimit -a
And it gives output as:
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size ...
0
votes
1answer
2k views
How to permanently Set/change the Limits in Solaris 10 system wide
I received email from oracle to change the limit on solaris 10 server to make oracle application work,
unfortunately i have no experience in Solaris, so need assistance
Values will be like below
...
0
votes
1answer
505 views
How to make sure nproc values are taking effect for all the users?
In the /etc/security/limit.conf file I have added the following values:
user1 - nproc unlimited
user2 - nproc unlimited
Both user1 and user2 have sudo privileges and I ...
13
votes
4answers
9k views
How to cause “Argument list too long” error? [duplicate]
Context for the question: According to POSIX specs, ARG_MAX is maximum length of command-line arguments to exec() family of functions. Which lead me to believe that's actual number of arguments, ...
1
vote
2answers
6k views
getting 'Operation not permitted' error when setting ulimit for memlock in a Docker container running ubuntu:xenial (macOS host)
I am having trouble setting the 'memlock' system limit in a container that I launch like this:
docker run -it ubuntu:xenial
Here is what I tried in a nutshell:
In bash terminal session 1:
...
6
votes
1answer
7k views
Meaning of the values for ulimit memlock flag
When I run docker and use the --ulimit memlock=-1:-1 option, what do the soft/hard values of -1 mean? Does it mean that I am allowing an unlimited amount memory to be locked by this container/process?
3
votes
1answer
5k views
ulimit vs file-max
Could someone explain limit on open files in linux? The problem is that one of my applications if reporting "Too many open files".
I have
ulimit -n
1024
but
cat /proc/sys/fs/file-max
6578523
and
...
0
votes
1answer
406 views
Are the limits shown or set by ulimit per resource and per process?
Bash's ulimit concerns about limits on different kinds of resources.
Is it correct a limit shown or set by ulimit is per-resource?
Is each such limit the sum of the resources available to all the ...
4
votes
5answers
3k views
Why does the following way not change core file limit size?
To solve the problem in https://unix.stackexchange.com/a/446428/674, I followed https://stackoverflow.com/a/17483998/156458, but it doesn't set core file limit size?
$ sudo sh -c "ulimit -c 1024 &...
3
votes
1answer
2k views
Is setting ulimit -v sufficient to avoid memory leak
We have a process that in recent weeks had a once-off memory leak that resulted in it consuming all memory on our RHEL 7 box
We now wish to set limits around this such that it will never take any ...
5
votes
1answer
11k views
Where is the limit set? bash: fork: retry: No child processes
This:
$ seq 100000 | xargs -P0 -n1 -I {} bash -c 'echo {};sleep {}'
:
5514
bash: fork: retry: No child processes
started complaining around 5500 when the system had 11666 processes running. Now, ...
0
votes
1answer
4k views
How can I automatically set the core dump size on a single user?
I am running OpenSUSE. I usually open the console with an interactive non-login shell bash, and frequently use tcsh after logon. I am writing some C code, compiling with gcc, and I'd like to have the ...
4
votes
1answer
7k views
Increase number of open files in mac high sierra [duplicate]
On a mac high sierra 10.13.3 I have 256 open files.
I want to raise it and I open a terminal and enter
sudo launchctl limit maxfiles 1000000 1000000
This doesnt change anything when I enter
ulimit ...
4
votes
0answers
7k views
How to increase the maximum number of open files on Fedora?
I want to increase the maximum number of open files in Fedora 27,
since the default settings are too low:
$ ulimit -Sn
1024
$ ulimit -Hn
4096
First, I ensure that the system-wide setting is high ...
