Document SQL_WARNING_THRESHOLD.

Fix #429.

3 files changed, 7 insertions, 1 deletions

diff --git a/README.rst b/README.rst
index 6635837..c99c10f 100644
--- a/README.rst
+++ b/README.rst
@@ -186,6 +186,11 @@ The debug toolbar has two settings that can be set in ``settings.py``:
      with client-side frameworks. For example, when using with Angular.js, set
      this to 'ng-non-bindable' or 'class="ng-non-bindable"'. Defaults to ''.
 
+   * ``SQL_WARNING_THRESHOLD``
+
+     The SQL panel highlights queries that took more that this amount of time,
+     in milliseconds, to execute. The default is 500.
+
    Example configuration::
 
        def custom_show_toolbar(request):
diff --git a/debug_toolbar/utils/settings.py b/debug_toolbar/utils/settings.py
index 482781b..af9821f 100644
--- a/debug_toolbar/utils/settings.py
+++ b/debug_toolbar/utils/settings.py
@@ -19,6 +19,7 @@ CONFIG_DEFAULTS = {
         'debug_toolbar',
     ),
     'ROOT_TAG_ATTRS': '',
+    'SQL_WARNING_THRESHOLD': 500,   # milliseconds
 }
 
 
diff --git a/debug_toolbar/utils/tracking/db.py b/debug_toolbar/utils/tracking/db.py
index 7b8092c..dd49e39 100644
--- a/debug_toolbar/utils/tracking/db.py
+++ b/debug_toolbar/utils/tracking/db.py
@@ -135,7 +135,7 @@ class NormalCursorWrapper(object):
                 'stacktrace': stacktrace,
                 'start_time': start_time,
                 'stop_time': stop_time,
-                'is_slow': (duration > CONFIG.get('SQL_WARNING_THRESHOLD', 500)),
+                'is_slow': duration > CONFIG['SQL_WARNING_THRESHOLD'],
                 'is_select': sql.lower().strip().startswith('select'),
                 'template_info': template_info,
             }