diff --git a/Documentation/ApiOverview/ErrorAndExceptionHandling/Examples/Index.rst b/Documentation/ApiOverview/ErrorAndExceptionHandling/Examples/Index.rst
index bc5dd4f3a0..5fadca34e5 100644
--- a/Documentation/ApiOverview/ErrorAndExceptionHandling/Examples/Index.rst
+++ b/Documentation/ApiOverview/ErrorAndExceptionHandling/Examples/Index.rst
@@ -134,6 +134,13 @@ In :file:`config/system/settings.php` or :file:`config/system/additional.php`:
 
    $GLOBALS['TYPO3_CONF_VARS'] = array_replace_recursive($GLOBALS['TYPO3_CONF_VARS'], $changeSettings);
 
+..  note::
+    PHP warnings, among other things, are added to the TYPO3 log via 
+    the [Writer configuration](https://docs.typo3.org/permalink/t3coreapi:logging-configuration-writer) of Logging API. 
+    In production or from a performance perspective, you may not want this. 
+    The default value is :php:`\Psr\Log\LogLevel::WARNING`. 
+    Depending on requirements, the loglevel can be increased to :PHP:`\Psr\Log\LogLevel::ERROR`
+    (or higher).
 
 In :file:`.htaccess`: