Doubt on configuration

["Arnab Ganguly" <aganguly01@xxxxxxxxx>]

Hi,
Following is the configuration I am using.

<IfModule worker.c>
ServerLimit 2
StartServers 1
ThreadLimit 256
MaxClients 256
MinSpareThreads 1
MaxSpareThreads 256
ThreadsPerChild 256
MaxRequestsPerChild 0
</IfModule>


It launches two daemon (PIDs 25578 and 25579)  and one root (25577).
After it runs for an hour I get the following error
(24)Too many open files: apr_socket_accept: (client socket)
 and one of the daemon process is killed (PID 25579) and another daemon processes (PID 25623)gets created.


But when I use this configuration it works fine.
<IfModule worker.c>
ServerLimit 2
StartServers 1
ThreadLimit 128
MaxClients 128
MinSpareThreads 1
MaxSpareThreads 128
ThreadsPerChild 128
MaxRequestsPerChild 0
</IfModule>

I am not very clear as why this problem is happening.May
 be something silly I am doing.Thanks in advance.

regards
-A