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-rw-r--r--railties/guides/source/active_record_querying.textile3
1 files changed, 3 insertions, 0 deletions
diff --git a/railties/guides/source/active_record_querying.textile b/railties/guides/source/active_record_querying.textile
index 5970a45839..e46410ce59 100644
--- a/railties/guides/source/active_record_querying.textile
+++ b/railties/guides/source/active_record_querying.textile
@@ -1400,6 +1400,9 @@ A threshold of +nil+ disables automatic EXPLAINs.
The default threshold in development mode is 0.5 seconds, and +nil+ in test and
production modes.
+INFO. Automatic EXPLAIN gets disabled if Active Record has no logger, regardless
+of the value of the threshold.
+
h5. Disabling Automatic EXPLAIN
Automatic EXPLAIN can be selectively silenced with +ActiveRecord::Base.silence_auto_explain+: