YII: How do you log slow SQL queries? - sql

Question

I only want to log SQL queries that are slow, where slow is determined by any query that takes longer than a value specified by me. Is this possible? And how do I enable it?
DBProfiler works quite nicely, but it seems to always output to the screen and not the file:
array( //db profiler
'class'=>'ext.db_profiler.DbProfileLogRoute',
'countLimit' => 1, // How many times the same query should be executed to be considered inefficient
'slowQueryMin' => 0.1, // Minimum time for the query to be slow
),
How can I plug into DBProfiler or perhaps in another way so that I can get something written to application.log every time a query is slow?

Answer 1

In your config/main.php in the db component configuration set enableParamLogging and enableProfiling params to true and make sure that:
'log'=>array(
'class'=>'CLogRouter',
'routes'=>array(
array(
'class'=>'CFileLogRoute',
'levels'=>'error, warning',
),
// uncomment the following to show log messages on web pages
array(
'class'=>'CWebLogRoute',
),
),
),
is like this. for more infos CDbConnection and CLogRouter

Answer 2

try dbprofiler extension. my be it will help you...
dbprfiler

Answer 3

I ended up writing my own logging function:
private function slowQueryEvaluator($startTime, $endTime, $identifier) {
$MAX_TIME = 0.1;
$IP = Controller::getRealIpAddress();
$userID = -1;
if (isset(YII::app()->user->id)) {
$userID = YII::app()->user->id;
}
$seconds = $endTime - $startTime;
if ($seconds > $MAX_TIME ) {
YII::log($IP.' - '.$userID.' - '.$seconds.' seconds - '.$identifier);
}
}