我正在尝试测试wait_timeout
似乎被忽略的 MySQL 设置。
PHP 脚本:
<?php
function microtime_float()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
$sql = mysqli_connect('localhost','root','root','mysql');
$query = "SHOW VARIABLES WHERE Variable_name='wait_timeout';";
$result = $sql->query($query) or die($query.'<br />'.$sql->error);
$row = $result->fetch_object();
echo "wait_timeout = " . $row->Value . "<br/>\n";
$time_start = microtime_float();
$query = "SELECT SLEEP(2) FROM mysql.user;";
$sql->query($query) or die($query.'<br />'.$sql->error);
$time_end = microtime_float();
$time = $time_end - $time_start;
echo "Query completed in $time seconds<br/>\n";
echo "You got the page";
脚本输出:
wait_timeout = 2
Query completed in 8.0005459785461 seconds
You got the page
我的配置
mariadb-server-5.3.5
php5.3.6
为了强制 MySQL 在一定时间后超时查询,我需要做什么?