YSQL Follower Reads: Missing Configurable Replication Lag Threshold
When using YSQL follower reads in YugabyteDB, the goal is to achieve read scaling while maintaining a predictable bound on data staleness. The current implementation relies on an internal lag heuristic to decide when to redirect a follower‑read query to the leader, but this threshold is not exposed as a configurable GUC or visible metric, leaving operators u
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