The fs.file-max kernel property is set via sysctl command. You can see current settings executing command:

# sysctl fs.file-max
fs.file-max = 358920

If you plan to run high load service with big number of server connections then this parameter should be at least as twice big as the number of network connections you expect to support. You can change this setting executing command:

# sysctl -w fs.file-max=360000
fs.file-max = 360000