Truncate filter --- Status : core plugin, unit tested and maintained. The truncate filter is used to truncate the log message at a certain size. Example 1: truncate the message field to a max size of 200. Config using url: ``filter://truncate://?max_size=200`` Config using logstash format: ```` filter { truncate { max_size => 200 } } ```` Parameters: * ``max_size``: Maximum size of a message.