Re: Performance for a big application

The 5Qps limit is for connecting to the instance from an external connection, e.g. if you connect to the MySQL instance using a MySQL admin software. The idea here is that you can manage your data using a external connection This feature is not really intended to allow you run the application on an external server and just use GoogleSQL as data store.

When you connect from Appengine to the mysql instance, technically there's no limit QPS-wise, but I did see a limit of 100 concurrent connections. If you close the connections fast enough, or use a connection pool, you should have no problem handling that small load of 200qps.