ELK 7.1.1 with defaults - Logstash doesn't fill index

Input logstash configuration file was switched to this content:

input {
file{
path => "C:/l/example.txt"
start_position => "beginning"
}
}
output {
file {
path => "C:/l/output.txt"
}
}

Logstash logs contains:

[2019-06-26T12:06:34,417][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}
[2019-06-26T12:09:23,200][INFO ][logstash.outputs.file ] Opening file {:path=>"C:/l/output.txt"}
[2019-06-26T12:09:37,750][INFO ][logstash.outputs.file ] Closing file C:/l/output.txt
[2019-06-26T12:10:04,148][INFO ][logstash.outputs.file ] Opening file {:path=>"C:/l/output.txt"}
[2019-06-26T12:10:17,856][INFO ][logstash.outputs.file ] Closing file C:/l/output.txt
[2019-06-26T12:11:18,667][INFO ][logstash.outputs.file ] Opening file {:path=>"C:/l/output.txt"}
[2019-06-26T12:11:38,129][INFO ][logstash.outputs.file ] Closing file C:/l/output.txt

What ELK settings does control timeout between input file edit&save and it's opening by logstash?

Moved to Logstash 7 timeout between input file modification and output file write control