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Confluence - warning about innodb_log_file_size on AWS Aurora

Jiri Pik

When running Confluence on AWS Aurora i am getting this error

Your innodb_log_file_size of 50,331,648 is too small. You should increase innodb_log_file_size to 256M.

Aurora does not allow to change this parameter.

First, is it a real problem? What could be the consequences?

Second, is there any workaround, e.g. connection string suffix or so?

Accepted answers

Nic Brough -Adaptavist-

Yes, you can lose writes to the database and risk crashes.

You need to increase the log file size. Sorry, there's no other option.

All comments

Nic Brough -Adaptavist-

Yes, you can lose writes to the database and risk crashes.

You need to increase the log file size. Sorry, there's no other option.

Jiri Pik

But for AWS Aurora there is no way to increase this parameter

Jiri Pik

Any workaround?

Nic Brough -Adaptavist-

Again, you need to increase the log file size.

Renato G

FWIW, this is Amazon Support's answer to this question:

The parameter "innodb_log_file_size" is not applicable for Aurora MySQL and doesn't need to be tuned in Aurora. In MySQL, increasing this variable might be helpful to increase the performance of the write operations but it is not valid for Aurora as it uses different storage to handle all write operations effectively. Kindly note that RDS Aurora does not handle logs same way as RDS MySQL instances does, therefore this parameter is inconsequential in RDS Aurora MySQL. This is the reason it is not exposed in the parameter group of your Aurora DB instance. Your tool may detect this but RDS Aurora does not use it. So, you can kindly ignore the message. Having said that, if you are facing any issues regarding this, please let us know. We'll be happy to help you. Similarly, several Aurora parameters are optimized for better performance and cannot be changed in Aurora. You can find a list of the variables available in Aurora RDS in the documentation below:
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/AuroraMySQL.Reference.html#AuroraMySQL.Reference.ParameterGroups

I hope this helps. I am building a Confluence server on Aurora as well.

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