Hi, On 2023-01-27 12:48:43 +0530, Bharath Rupireddy wrote: > Looking at the patch, the feature, in its current shape, focuses on > improving replication lag (by throttling WAL on the primary) only when > synchronous replication is enabled. Why is that? Why can't we design > it for replication in general (async, sync, and logical replication)? > > Keeping replication lag under check enables one to provide a better > RPO guarantee as discussed in the other thread > https://www.postgresql.org/message-id/CAHg%2BQDcO_zhgBCMn5SosvhuuCoJ1vKmLjnVuqUEOd4S73B1urw%40mail.gmail.com.
I think something narrower and easier to achieve is a good thing. We've already had loads of discussion for the more general problem, without a lot of actual progress. Greetings, Andres Freund
