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check_command.cfgcheck_command config example
check_orastbycheck_orastby plugin
services.cfgservices config example

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Check the difference between active and standby oracle database
This plugin compare the values returned by a query on the
v$log_history table of the active and standby DB.

The difference is a value

The predefined range are:
0-4 ok
5-10 warning
10- critical

The plugin is tested and running with the Oracle InstantClient.
You need to configure you parameters ( LD_LIBRARY_PATH, PATH and TNS_ADMIN) at the top of plugin.