title: Check for monitor mysql open_files agents: linux catalog: os/linux license: GPL distribution: description: This check will monitor mysql open_files raported to setted open_files_limit value. The plugin must be copied into /usr/lib/check_mk_agent/plugins folder and the executable bit mus be set for this file. Will return current open_files_limit and open_files values. The check gets critical at 90 percent of open_files_limit and warning at 80. Both limits are definable in Wato under "Parameters for Inventorized Checks", "Applications, Processes & Services". inventory: One service will be created for each host running the plugin. perfdata: Percent usage of open_files_limit value.