Voroa Postgres
Read replicas: serve reads from a second copy of your database
What a read replica is, why moving heavy read queries off the primary protects your writes, and what a replica can never be trusted to do for you today.
What this covers
A read replica is a copy of your database that receives every change from the primary and answers read queries only. It helps when reads are what is hurting you, which is common: a dashboard, a report or a search page can be expensive enough to slow down the writes everyone else depends on. Sending those queries to a replica keeps them off the primary entirely. The catch is lag. A replica is always slightly behind, so a page that writes a row and immediately reads it back from the replica can correctly find nothing.
Read replicas are not available on Voroa today.