The default nofile ulimit is 1024 soft, 4096 hard. As you know, the soft limit is *the* limit. A hard limit specifies how high a process may increase the ulimit; many processes don't attempt this. Apache on CentOS 6, for example, will easily run over the 1024 soft limit after just 55 server side includes (not attempted on Ubuntu), and does not attempt to raise the ulimit to the 4096 maximum. I have had some issues with Web browsers running out of open files because of sites with keepalive sockets (websockets), cache, plug-ins using local storage in crazy ways, and so on.
Perhaps it is prudent to set limits in /etc/security/limits.conf by default to a higher value, such as 32767 soft and 65535 hard for open files. The original limits came about on 32-bit systems with less than 16GB of RAM and 4TB of hard drive space. -- Ubuntu-devel-discuss mailing list Ubuntu-devel-discuss@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss
