diff --git a/doc/src/sgml/release-15.sgml b/doc/src/sgml/release-15.sgml
index 3019d6c61f2..78aa7c1bb80 100644
--- a/doc/src/sgml/release-15.sgml
+++ b/doc/src/sgml/release-15.sgml
@@ -21,6 +21,11 @@
A dump/restore is not required for those running 15.X.
+
+
+ However, if you regularly create and drop tables exceeding 1GB,
+ see the first changelog entry below.
+
@@ -31,6 +36,43 @@
+
+ Fix failure to remove non-first segments of large tables
+ (Tom Lane)
+
+
+
+ PostgreSQL splits large tables into
+ multiple files (normally with 1GB per file). The logic for dropping
+ a table was broken and would miss removing all but the first such
+ file, in two cases: drops of temporary tables and WAL replay of
+ drops of regular tables. Applications that routinely create
+ multi-gigabyte temporary tables could suffer significant disk space
+ leakage.
+
+
+
+ Orphaned temporary-table files are removed during postmaster start,
+ so the mere act of updating to 15.1 is sufficient to clear any
+ leaked temporary-table storage. However, if you suffered any
+ database crashes while using 15.0, and there might have been
+ large tables dropped just before such crashes, it's advisable
+ to check the database directories for files named according to the
+ pattern
+ NNNN.NN.
+ If there is no matching file named
+ just NNNN (without
+ the .NN suffix), these
+ files should be removed manually.
+
+
+
+
+