Are default mysql parameters in RDS sane?

RDS uses the same set of parameters for all instance sizes and they don't seem to be that far from defaults (max_packet_size being too small etc.)

Has anyone looked at them and reviewed them fo开发者_StackOverflow社区r how sensible they are, especially on relatively bigger instances?

The default buffer size for MyISAM is too small in RDS parameter group, I have made changes of that, make significant improvement in read/write performance. However, just beware, not all MySQL parameters are honored by RDS, only those ones shown in parameter group.

you can always change the parameter set to fit your application.