# Class **Phalcon\Db\Profiler**[](# "永久链接至标题") Instances of Phalcon\Db can generate execution profiles on SQL statements sent to the relational database. Profiled information includes execution time in miliseconds. This helps you to identify bottlenecks in your applications. ~~~ <?php $profiler = new \Phalcon\Db\Profiler(); //Set the connection profiler $connection->setProfiler($profiler); $sql = "SELECT buyer_name, quantity, product_name FROM buyers LEFT JOIN products ON buyers.pid=products.id"; //Execute a SQL statement $connection->query($sql); //Get the last profile in the profiler $profile = $profiler->getLastProfile(); echo "SQL Statement: ", $profile->getSQLStatement(), "\n"; echo "Start Time: ", $profile->getInitialTime(), "\n"; echo "Final Time: ", $profile->getFinalTime(), "\n"; echo "Total Elapsed Time: ", $profile->getTotalElapsedSeconds(), "\n"; ~~~ ### Methods[](# "永久链接至标题") public [*Phalcon\Db\Profiler*]()**startProfile** (*string* $sqlStatement, [*unknown* $sqlVariables], [*unknown* $sqlBindTypes]) Starts the profile of a SQL sentence public **stopProfile** () Stops the active profile public **getNumberTotalStatements** () Returns the total number of SQL statements processed public **getTotalElapsedSeconds** () Returns the total time in seconds spent by the profiles public **getProfiles** () Returns all the processed profiles public **reset** () Resets the profiler, cleaning up all the profiles public **getLastProfile** () Returns the last profile executed in the profiler | - [索引](# "总目录") - [下一页](# "Class Phalcon\Db\Profiler\Item") | - [上一页](# "Class Phalcon\Db\Index") | - [API Indice](#) »