RabbitMQ File Size-based Log Rotation Default Size - rabbitmq

Question

I'm new to RabbitMQ and I have an application that uses RabbitMQ as the message broker. Up until this day, I've been using the default settings - no log rotation. I wanted to use the log rotation feature so I set it using:
{log, [
{file, [{file, "MyAppLogs.log"},
{level, info},
{date, "$D0"},
{size, 1073741824},
{count, 30}
]}
]}
Of course testing would take a while if I am to test 1GB file size, so for testing purposes I changed it to 1024 instead. I expected the log will rotate when it reaches 1KB but it did not. I've noticed that the log files would only rotate once the file size reaches 5KB.
So my question is - is the minimum log file size for RabbitMQ file-based log rotation 5KB?
I've looked around the web - especially in the rabbitmq documentation site: https://www.rabbitmq.com/logging.html - however there's no mention of any minimimum size.
Here is the sample output of my the settings that I've used:
Test Settings:
[{file, [{file, "rabbit.log"},
{level, info},
{date, "$D0"},
{size, 1024},
{count, 3}
]}
]}

Answer 1

https://groups.google.com/d/topic/rabbitmq-users/wJGMVGB1cAk/discussion
Hi Renya,
Please always let us know what version of RabbitMQ and Erlang you are using. I can tell you're using Windows - what version?
Log rotation is not necessarily precise due to when it happens in the logging process, as well as buffering.
Thanks -
Luke
NOTE: the RabbitMQ team monitors the rabbitmq-users mailing list and only sometimes answers questions on StackOverflow.

Answer 2

This requires rabbitmq version > 3.7. Put the log rotate logics inside your rabbitmq.conf file like below:
{log, [
{file, [{file, "/var/log/rabbitmq/rabbitmq.log"}, %% log.file
{level, info}, %% log.file.info
{date, "$D0"}, %% log.file.rotation.date
{size, 1024}, %% log.file.rotation.size
{count, 15} %% log.file.rotation.count
]}
]},