At every page load I log small row just for testing purpose, but, my app.log grows rapidly because of logging of cookies, server and session globals.
2015-05-15 08:20:50 [126.96.36.199][-][info][application] $_COOKIE = [
$_SESSION = [
$_SERVER = [
In which point of code is this log triggered?
I find the answer here: http://www.yiiframework.com/doc-2.0/guide-runtime-logging.html#message-formatting