lighttpd too many open files

lighttpd server crashes with fllowing error in error_log file.

2019-11-05 09:39:02: (network_linux_sendfile.c.143) open failed:  Too many open files
2019-11-05 09:39:02: (connections.c.603) connection closed: write failed on fd 1228
2019-11-05 09:39:02: (response.c.537) file not found ... or so:  Too many open files /4032/1_451.jpg ->

As lighttpd is a single-threaded server, its main resource limit is the number of file descriptors, which is set to 1024 by default (on most systems).

If you are running a high-traffic site you might want to increase this limit by setting server.max-fds.

server.max-fds = 8192

[root@server22 lighttpd]# cat /proc/sys/fs/file-nr
4544    0       95873
[root@server22 lighttpd]#

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