MongoDB\Driver\Server::getLatency

(mongodb >=1.0.0)

MongoDB\Driver\Server::getLatency — Returns the latency of this server in milliseconds

说明

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.

参数

此函数没有参数。

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).

错误／异常

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

更新日志

版本	说明
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());

?>

以上例程的输出类似于：

int(592)

参见

MongoDB\Driver\Server::getInfo() - Returns an array of information describing this server
MongoDB\Driver\ServerDescription::getRoundTripTime()
» Server Discovery and Monitoring Specification

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官方地址：https://www.php.net/manual/en/mongodb-driver-server.getlatency.php

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MongoDB\Driver\Server::getLatency

说明

参数

返回值

错误／异常

更新日志

范例

参见

User Contributed Notes