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Questions tagged [ulimit]

181 questions
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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-application environments, so I'm mostly worried about…
sysadmin1138
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can't log in when nofile is set to unlimited in /etc/security/limits.conf

I set the following values (-1 will be resolved to unlimited, I suppose) in /etc/security/limits.conf (CentOS 6.2) root nofile soft -1 root nofile hard -1 and I can't log in with root user now. Similar to the issue described here. Setting the value…
manuzhang
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How to increase max FD limit for a daemon process running under a headless user?

To increase the FD limit for a daemon process running under a headless user on a Ubuntu Linux machine we did following changes in /etc/security/limits.conf soft nofile 10000 hard nofile 10000 We also added session required pam_limits.so in…
Ameliorator
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Understanding ulimit -u

I'd like to understand what's going on here. linvx$ ( ulimit -u 123; /bin/echo nst ) nst linvx$ ( ulimit -u 122; /bin/echo nst ) -bash: fork: Resource temporarily unavailable Terminated linvx$ ( ulimit -u 123; /bin/echo one; /bin/echo two;…
tripleee
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Is this the correct way to permanently set the ulimit in Debian?

Manually I can set via ulimit -n 20000 the file descriptor limit and it works fine. To have this limit for every user also after a restart of the machine, can I add * soft nofile 20000 to /etc/security/limits.conf? I…
disco crazy
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Squid running out of file descriptors on Ubuntu

I am running Squid 2.7 on Ubuntu 10.04 64bits. I had the problem of Squid running out of file descriptors, with the following error showing in /var/log/squid/cache.log: WARNING! Your cache is running out of filedescriptors I checked…
UrkoM
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How do I set 'max threads per process' ulimit for non-root user?

Ulimit man page suggests -r option will set this but it only appears to be valid for the root user and there is no equivalent for setting it via /etc/security/limits? Any ideas?
Jon
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Using ulimit to limit the amount of memory a script can use

I have an ubuntu system and I have a script that runs regularly. I need to limit the maximum amount of memory that this script can use. AFAIK ulimit is the command to do this, however I can't get it to work. For example I have the following…
Amandasaurus
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Can we set ulimit in /etc/sysconfig/init file to apply the value at boot time

I need to have the ulimit value set at the boot time to all my services. I have values set in /etc/sysconfig/limits.conf but these values are not applicable during the boot time and it takes 1024 as default. I have set the values in limits.conf,…
Sandeep Sukhija
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Linux: limits.conf values are not honored

I set some values in /etc/security/limits.conf as below: * hard stack 204800 * hard nofile 8192 Then rebooted the server. Also I have removed the file /etc/security/limits.d/90-nproc.conf However, the ulimit command still lists some…
slayedbylucifer
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How does ulimit come into effect on the fly?

I have added 2 lines in /etc/security/limits.conf myuser soft nofile 16384 myuser hard nofile 16384 ...which has no effect: su - sysctl -p su myuser ulimit -n 1024 It is important that this comes into effect without the user having to log in…
recalcitrant
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Will open files limit in Centos affect HTTP connections? Does the limit apply to a single session or all sessions?

When I do a ulimit -n I got 256, I assume it means I can open 256 files at the sametime. Does it means I can open 256 files with one single session? or all sessions? For example, I logined to my server with username "abc" (via putty/ssh), and open…
forestclown
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(node) Hit max file limit. Increase "ulimit -n"

In Ubuntu 9 I am receiving a message on my server that says: (node) Hit max file limit. Increase "ulimit -n" However, typing commands in the terminal reveals the following: $ ulimit unlimited $ ulimit -n 65535 And a netstat reveals I…
kidcapital
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"Too many open files" Apache error even with increased ulimit and sysctl

I'm load testing an Amazon Linux EC2 instance running Apache (event MPM) and PHP-FPM using Locust. When I run my load test with 200 users (~28 requests per second), everything is fine. When I boost the number of users to 300 (~43 requests per…
Monkey34
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Changing ulimit on systemd

I've found this link, showing how to change the ulimits on systemd. /etc/systemd/system/.d/override.conf [Service] LimitNOFILE=49152 I found a website suggesting to change the ulimits for systemd in these…
DiViNe
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