Throttling deploy requests
You now have the option to manage the speed of your deploy requests by configuring the throttler. Normally, you don't need to get involved, as the Vitess tablet throttler automatically identifies when replication lag is high on your database, and slows down migration progress. However, we're giving you additional control over migration throttling if the defaults are insufficient in mitigating load on your database.
The throttle setting is a value between 0 and 95, where 0 means no throttling and 95 is nearly fully throttled, drastically slowing down migrations. The throttle setting can be configured at the database level, keyspace level, or per-deploy request.
For more information, see the Throttling deploy requests documentation.