Increasing number of open file handles in kernel.
I have successfully increased the number of files on my system (Linux 2.0.30) by editing the following file:
I increased NR_OPEN to 1024, NB. Don't make it any higher than this as it will break other code in the kernel and your new kernel wont boot !
I also increased NR_INODE to 5000, and NR_FILE to 4096.
I then rebuilt the Kernel (and modules for good measure) and installed the new image.
Note: Its always a good idea to have your original Kernel image available. I installed a boot block in my MBR using lilo, and added an entry for my original kernel I named vmlinux.safe.
For my root system on /dev/hda2 I added the following lines to my existing /etc/lilo.conf
image=/vmlinux.safe image=linuxS root=/dev/hda2