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AWS AmazonRDS: New aurora_write_delay_ms system variable in Aurora MySQL

Service: AmazonRDS · 2026-09-30 · Documentation low

File: AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.848.md

Summary

Adds a release note about a new system variable aurora_write_delay_ms that adds a configurable delay to write operations on the writer when physical replication lag is high, to help prevent Aurora Replica restarts.

Security assessment

This is a replication/availability feature note with no authentication, encryption, or access-control implications.

Evidence

Introduced a new system variable `aurora_write_delay_ms` that adds a configurable delay to write operations (such as DML statements) on the writer instance when physical replication lag is high, helping prevent Aurora Replica restarts.

Diff

diff --git a/AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.848.md b/AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.848.md
index 3d32e61..52d6d92 100644
--- a//AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.848.md
+++ b//AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.848.md
@@ -34,0 +35,2 @@ If you have any questions or concerns, AWS Support is available on the community
+  * Introduced a new system variable `aurora_write_delay_ms` that adds a configurable delay to write operations (such as DML statements) on the writer instance when physical replication lag is high, helping prevent Aurora Replica restarts.
+