Socket problem in Fedora Core 2

[Bob Chiodini]

On Thu, 2005-09-08 at 14:58 +0200, Andreas Storm wrote:
> Hi,
> 
> My setup: Fedora Core 2 with 2.6.10-1.771_FC2smp kernel.
> 
> I'm currently developing a simulator for load testing
> which needs to handle around 40-50K connections. A mixture of TCP and UDP.
> 
> I changed the amount of file descriptors to 64000
> with ulimit -n 64000 as root.
> 
> But when I run and reach around 27000 TCP connections
> my application stops and dmesg writes the following:
> 
> "out of socket memory" several times.
> 
> I wonder what is the problem and how it can be fixed. Didn't have any luck at the mail archive or google.
> 
> Any help appreciated.
> 
> Br,
> /Andreas
> 
> 
> 

Andreas,

I found the "out of socket memory" in tcp_timer.c.  The implication that
the sysctl variable net.ipv4.tcp_max_orphans controls the limit (among
other things).  On FC3 this is set to 65536.  What is it in FC2?

Bob...