squid ---file decriptors

[Rudlof Amirjanyan]

Hello list.

I have recompiled my squid for supporting more than 1024 file descriptors,
but after that this strange behavior.

In my squid startup script when I put ulimit -HSn NNN (NNN is any number
less than 960) it is working well, i.e. in
/usr/local/squid/var/logs/cache.log I get the following (With NNN file
descriptors available).

But when I put for example ulimit -HSn 1024 in and restart the squid in the
cache.log it comes "With 960 file descriptors available"

So it is not supporting more than 960 file descriptors ?  But Why ?

BTW in the /usr/include/bits/typesizes.h  -------- I have "#define
__FD_SETSIZE            1024"
I changed it to 4096 but did not help.

Pls come with Ideas .
Thanks in advance