doc: Fix description WAL writer in glossary

The WAL writer is an auxiliary process, but its description in the
glossary did not match that.

This is inexact since d3014fff4cd4.

Author: Masahiro Ikeda
Discussion: https://postgr.es/m/d3a5a4278fd8d9e7a47c6aa4db9e9a39@oss.nttdata.com
Backpatch-through: 15

diff --git a/doc/src/sgml/glossary.sgml b/doc/src/sgml/glossary.sgml
index ada723a5227aa9323d4179b7a27e7c0852e6c6cb..a93517ae1a93ca1ce9cee895eb4a9a314fc1d508 100644 (file)
--- a/doc/src/sgml/glossary.sgml
+++ b/doc/src/sgml/glossary.sgml
@@ -2028,7 +2028,8 @@
    WAL writer (process)
    
     
-     A process that writes WAL records
+     An auxiliary process
+     that writes WAL records
      from shared memory to
      WAL files.