On May 5, 2011, at 10:52 AM, Reza Lotun wrote:

2011/5/5 Juan Antonio Ibaņez Santorum <juanito1982@gmail.com>
I had got the same problem using '-r epoll' options when starting the app via twistd... When 1024 descriptors are opened, I can see 100% CPU. 

Any ideas?


1. Edit /etc/sysctl.conf and place the following line there:
       fs.file-max = 999999
2. Type $ sudo sysctl -p
3. Place the following two lines:
*       soft    nofile      999999
*       hard    nofile      999999
Either reboot, or also type in `ulimit -n 999999`
4. Check that $ ulimit -a shows your open fixes set to 999999

There's nothing special about 999999 - it's just some big number conveniently bigger than 1024. Enjoy.

Reza

Would you mind opening a doc bug for explaining how to do this on multiple platforms, and maybe writing a lore doc about it?  This is a really important tuning thing for anyone wanting to run even a medium-scale Twisted service.

(Also, once again, the bug is <http://twistedmatrix.com/trac/ticket/816>, somebody please fix it :).)

-glyph