hat einer die Ahnung?

In welcher kernel-header-datei stell ich die filehandle grösse ein?

Kernel-Version ist 2.2.14

Hm, geht das nicht dynamisch?

Siehe /usr/src/linux/Documentation/proc.txt

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The kernel allocates file handles dynamically, but as yet doesn't free them again.

The value in file-max denotes the maximum number of file handles that the Linux kernel will allocate. When you get a lot of error messages about running out of file handles, you might want to raise this limit. The default value is 4096. To change it, just write the new number into the file:

# cat /proc/sys/fs/file-max

4096

# echo 8192 > /proc/sys/fs/file-max

# cat /proc/sys/fs/file-max

8192

This method of revision is useful for all customizable parameters of the kernel - simply echo the new value to the corresponding file.