(mongodb >=1.0.0)
MongoDB\Driver\Server::getLatency — Returns the latency of this server
Returns the latency of this server (i.e. the client's measured » round trip time of an ismaster command).
此函数没有参数。
Returns the latency of this server.
Example #1 MongoDB\Driver\Server::getLatency() example
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017/");
$rp = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_PRIMARY);
$server = $manager->selectServer($rp);
var_dump($server->getLatency());
?>
以上例程的输出类似于：
int(592)