diff --git a/doc/src/sgml/auto-explain.sgml b/doc/src/sgml/auto-explain.sgml
index 8325f0371d..03b2309da8 100644
--- a/doc/src/sgml/auto-explain.sgml
+++ b/doc/src/sgml/auto-explain.sgml
@@ -139,6 +139,27 @@ LOAD 'auto_explain';
+
+
+ auto_explain.log_timing (boolean)
+
+
+ auto_explain.log_timing> configuration parameter
+
+
+
+ auto_explain.log_timing causes EXPLAIN
+ (ANALYZE, TIMING off)> output, rather than just EXPLAIN (ANALYZE)>
+ output. The overhead of repeatedly reading the system clock can slow down the
+ query significantly on some systems, so it may be useful to set this
+ parameter to FALSE when only actual row counts, and not
+ exact times, are needed.
+ This parameter is only effective when auto_explain.log_analyze
+ is also enabled. It defaults to TRUE.
+
+
+
+
auto_explain.log_nested_statements (boolean)