Messages in this thread |  | | Date | Mon, 11 Nov 1996 08:38:00 +0200 | From | (Oskar Pearson) | Subject | Re: too many open files? |
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Hi
> I tried running apache and got back the "too many open files" error.
There are generally two possible errors: You can have too many files open on your system (say you have lots of programs that are opening a few files each) or a single process (like apache) can open 256 files (this is the default value)
The one you can increase on the fly, the other not.
To increase the total number that you can open on the system, you can "echo" values to various files in /proc (assuming you are running 2.0.latest)
> How can I check/monitor the number of file descriptors being used?? cat /proc/sys/kernel/file-nr (maximum Overall open files on system opened) cat /proc/sys/kernel/inode-nr (maximum Overall open inodes on system opened)
cat /proc/sys/kernel/file-max (maximum files on the system that can be opened concurrently) cat /proc/sys/kernel/inode-max (maximum inodes on the system that can be opened concurrently)
> Where do I change it if it needs to be increased?
If you want to increase the files per process, have a look at http://www.linux.org.za/tweak.html (Yes, I know that it is almost the only thing on the server :(
If you want to increase the number of maximum open files (ie the value in file-max is the same as the value in file-nr) you can echo values as follows:
echo "4096" >/proc/sys/kernel/file-max echo "12288" >/proc/sys/kernel/inode-max
(inode-max's value is almost allways 3 times the size of file-max, keep it that way!)
Oskar
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