Out of File-descriptors!?!?

Hello everybody,

today happened a really discourageing thing to my Squid...
I got an error message:

:The following error was encountered:
:
: Out of file descriptors
:
:The system returned:
:
: (22) Invalid argument
:
:This means that:
:
: The cache is currently very busy. Please try again.

The first thing i did was using the cachemgr-interface with the option file
descriptor-usage selected.
The server response showed me that all of 256 file descriptors are in use.

I'm using Linux Kernel 2.0.24 with Squid/1.1.beta20.

cat /proc/sys/kernel/file-max shows me that are 1024 file-descriptors are
available!?!?

How can I solve my problem?

Cheers
Swen

-
             "The Computers are fine, the staff's down."
-
  Swen Mager <URL:http://www.blitz.net/~swen/> TALK swen@cirrus.blitz.de
  BLITZ Datentechnik GmbH, Nebingerhof 5, D-96047 Bamberg, Germany
  Tel: +49/951/9685161, Fax: +49/951/9685164, email: swen@blitz.net
Received on Mon Dec 09 1996 - 09:38:25 MST