diff --git a/doc/src/sgml/release-19.sgml b/doc/src/sgml/release-19.sgml
index 253fa07179a..7939d44aa36 100644
--- a/doc/src/sgml/release-19.sgml
+++ b/doc/src/sgml/release-19.sgml
@@ -303,6 +303,22 @@ large analytical queries to manually enable <acronym>JIT</acronym>.
 </para>
 </listitem>
 
+<!--
+Author: Masahiko Sawada <msawada@postgresql.org>
+2026-11-02 [8628df889] Make parallel vacuum processes share the cost limit.
+-->
+
+<listitem>
+<para>
+Make the leader and workers of a <link linkend="parallel-vacuum">parallel vacuum</link> share the cost-based vacuum delay limit (Bharath Rupireddy)
+<ulink url="&commit_baseurl;8628df889">&sect;</ulink>
+</para>
+
+<para>
+Previously each process slept based only on the cost it incurred itself, so a parallel vacuum could consume several times the budget set by <link linkend="guc-vacuum-cost-limit"><varname>vacuum_cost_limit</varname></link>.  As a result, <link linkend="sql-vacuum"><command>VACUUM</command></link> with parallel workers and cost-based delay enabled can run slower than in previous releases.
+</para>
+</listitem>
+
 <!--
 Author: Amit Kapila <akapila@postgresql.org>
 2025-11-18 [3edaf29fa] Rename two columns in pg_stat_subscription_stats.