doc: Mention the rename of wal_keep_segments GUC in release note.

Commit f5dff45962 renamed wal_keep_segments to wal_keep_size.
This commit adds the mention to this change in the release note.

Author: Fujii Masao
Reviewed-by: David Steele
Discussion: https://postgr.es/m/dc4768f2-1eff-d2fc-35ba-6b2985b7cb6c@oss.nttdata.com

diff --git a/doc/src/sgml/release-13.sgml b/doc/src/sgml/release-13.sgml
index 95d6631faab813b18ae523c9ff8444496c4ddacc..18e6497a7f21b18d046b2e0d83ac34378ac8bb51 100644 (file)
--- a/doc/src/sgml/release-13.sgml
+++ b/doc/src/sgml/release-13.sgml
@@ -209,6 +209,28 @@ Author: Fujii Masao 
 
     
 
+
+     
+      Rename configuration parameter wal_keep_segments
+      to  (Fujii Masao)
+     
+
+     
+      This determines how much WAL to retain for the standby server,
+      specified in megabytes rather than number of files. If you
+      previously used wal_keep_segments,
+      the following formula will give you an approximately equivalent setting:
+
+wal_keep_size = wal_keep_segments * wal_segment_size (typically 16MB)
+
+     
+    
+
+    
+