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Add custom log handler


--log-handler format command


--log-handler format command adds a log handler that writes log data to the application specified by command in the format specified by format.

The server instance launches an instance of the log handler at startup. All log events are sent to the STDIN stream of the log handler. The STDOUT and STDERR streams of the log handler are captured and written to INSTANCE_ROOT/log/custom_logger_N.out and INSTANCE_ROOT/log/custom_logger_N.err.



Format used to write log events. Valid values are:

  • text/plain

  • text/json

  • text/xml


Application launched to process log events.


Send log events to a custom JSON parser that prepares performance graphs.

--log-handler text/json perf_grapher
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