MongoDB\Driver\Server::getLatency

(mongodb >=1.0.0)

MongoDB\Driver\Server::getLatencyReturns the latency of this server in milliseconds

說明

final public MongoDB\Driver\Server::getLatency(): ?integer

Returns the latency of this server in milliseconds. This is the client's measured ? round trip time of a hello command.

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

Returns the latency of this server in milliseconds, or null if no latency has been measured (e.g. client is connected to a load balancer).

錯(cuò)誤/異常

更新日志

版本 說明
PECL mongodb 1.11.0 This method will return null if no latency has been measured. In earlier versions, an integer was always returned and an unset value might be reported as -1.

范例

示例 #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());

?>

以上例程的輸出類似于:

int(592)

參見