[takeda]

Compared to others my experience with RDS is bad, although I used it last year ago perhaps things improved.

One major issues is that you are restricted to what you can do with it, not all options are available. You can only use extensions that they provide. (this I'm a bit fuzzy about) but changing disk size made service unavailable for ~30 minutes (proportional to new disk size). You weren't able to configure replication, the replication only happens to the backup node. You weren't even able to set up replication across regions.

The replication is kind of a bummer, because if you ever would like to move your data (perhaps to a vm or outside of aws) you would need to have an outage. Also if I remember there was no way to do major version update in place.

There was also another incident (it was caused by bug so hopefully it was fixed and won't happen to anyone else). We had cluster set up with a backup. One day out of nowhere the service stopped working and was unavailable for 1.5 hours. That was quite big issue because we used it for monitoring (zabbix), so any outage makes us blind to issues. Turned out that due to bug their backup routine made a mistake and started doing backup on the master server (normally it supposed to do on slave).