SHOUTcast DNAS 2.2 (Build 107) 10/16/2013 *** Forum Exclusive ***

Cande · 18th November 2013, 13:06

Hello,
I'm trying to change the maximum number of open files for the process sc_serv in my private Shoutcast DNAS 2.2 server running on Ubuntu 12.04.3 LTS 64 bit.

The system itself (sysctl -a) has a safe 202022 max open files limit.

I changed this value at "user level" to 65536 (both hard and soft limits) by editing the /etc/security/limits.conf (and by requiring pam_limits.so) and also run "ulimit -n 65536", but if I run this command:

cat /proc/(sc_serv's PID)/limits

... it shows "Max open files 1024 (soft limit) and 4096 (hard limit).
Accordingly, Shoutcast's log states 1024 as maximum open files limit.

It sounds like sc_serv uses a "self per process" setting when it starts up, ignoring system wide and per user settings.
Is there a way to change this? Is this a known limit or bug?

Thanks a lot in advance for your support and your great work!

Cheers!!!
Cande

Cande · 18th November 2013, 21:38

Update!

I found that after booting the server and (auto) starting sc_serv via shell script, the open files limit is 1024 despite changes done in limits.conf and PAM files, but if I manually stop sc_serv, issue the "ulimit -n 65536" and start sc_serv again, then the limit is correctly set to 65536 max open files!

So, the new question is: how can I make sc_serv to acquire the desired "ulimit -n" at system boot?

I am using Webmin to manage the server and my suspect is that this module changes the limits regardless of limits.conf/PAM...

Any hints?

Thanks again!
Cande

18th November 2013, 13:06	#1
Cande Junior Member Join Date: Nov 2013 Posts: 15	sc_serv max open files Hello, I'm trying to change the maximum number of open files for the process sc_serv in my private Shoutcast DNAS 2.2 server running on Ubuntu 12.04.3 LTS 64 bit. The system itself (sysctl -a) has a safe 202022 max open files limit. I changed this value at "user level" to 65536 (both hard and soft limits) by editing the /etc/security/limits.conf (and by requiring pam_limits.so) and also run "ulimit -n 65536", but if I run this command: cat /proc/(sc_serv's PID)/limits ... it shows "Max open files 1024 (soft limit) and 4096 (hard limit). Accordingly, Shoutcast's log states 1024 as maximum open files limit. It sounds like sc_serv uses a "self per process" setting when it starts up, ignoring system wide and per user settings. Is there a way to change this? Is this a known limit or bug? Thanks a lot in advance for your support and your great work! Cheers!!! Cande

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18th November 2013, 21:38	#2
Cande Junior Member Join Date: Nov 2013 Posts: 15	Update! I found that after booting the server and (auto) starting sc_serv via shell script, the open files limit is 1024 despite changes done in limits.conf and PAM files, but if I manually stop sc_serv, issue the "ulimit -n 65536" and start sc_serv again, then the limit is correctly set to 65536 max open files! So, the new question is: how can I make sc_serv to acquire the desired "ulimit -n" at system boot? I am using Webmin to manage the server and my suspect is that this module changes the limits regardless of limits.conf/PAM... Any hints? Thanks again! Cande