Currently ulimit -n shows 10000. I want to increase it to 40000. I've edited "/etc/sysctl.conf" and put fs.file-max=40000. I've also edited /etc/security/limits.conf and updated hard and soft values. But still ulimit shows 10000. After making all these changes I rebooted my laptop. I've access to root password.
usr_name@usr_name-lap:/etc$ /sbin/sysctl fs.file-max
fs.file-max = 500000
Added following lines in /etc/security/limits.conf -
* soft nofile 40000
* hard nofile 40000
I also added following line in /etc/pam.d/su-
session required pam_limits.so
I've tried every possible way as given on other forums, but I can reach up to a maximum limit of 10000, not beyond that. What can be the issue?
I'm making this change because neo4j throws maximum open file limits reached error.
What you are doing will not work for root user. Maybe you are running your services as root and hence you don't get to see the change.
To increase the ulimit for root user you should replace the * by root. * does not apply for root user. Rest is the same as you did. I will re-quote it here.
Add the following lines to the file: /etc/security/limits.conf
root soft nofile 40000
root hard nofile 40000
And then add following line in the file: /etc/pam.d/common-session
session required pam_limits.so
This will update the ulimit for root user. As mentioned in comments, you may don't even have to reboot to see the change.
1) Check sysctl file-max limit:
$ cat /proc/sys/fs/file-max
If the limit is lower than your desired value, open the sysctl.conf and add this line at the end of file:
fs.file-max = 65536
Finally, apply sysctl limits:
$ sysctl -p
2) Edit /etc/security/limits.conf and add below the mentioned
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
These limits won't apply for root user, if you want to change root limits you have to do that explicitly:
root soft nofile 65535
root hard nofile 65535
...
3) Reboot system or add following line to the end of /etc/pam.d/common-session:
session required pam_limits.so
Logout and login again.
4) Check soft limits:
$ ulimit -a
and hard limits:
$ ulimit -Ha
....
open files (-n) 65535
Reference : http://ithubinfo.blogspot.in/2013/07/how-to-increase-ulimit-open-file-and.html
I am using Debian but this solution should work fine with Ubuntu.
You have to add a line in the neo4j-service script.
Here is what I have done :
nano /etc/init.d/neo4j-service
Add « ulimit –n 40000 » just before the start-stop-daemon line in the do_start section
Note that I am using version 2.0 Enterprise edition. Hope this will help you.