PHP: the mysqlnd slow query log (incl. backtrace)

(Ulf Wendel) Sometimes you forget about what you did years ago, for example the ability of mysqlnd write back traces of slow queries into the PHP error log . Regardless if you use mysqlnd with ext/mysql, ext/mysqli or PDO_MYSQL, mysqlnd is able to tell you which of your code has executed a slow quer

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