# MongoDB\Driver\Server::getLatency

(mongodb >=1.0.0)

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

### Description

final public MongoDB\Driver\Server::getLatency ( ) : string

Returns the latency of this server (i.e. the client's measured » round trip time of an `ismaster` command).

### Parameters

This function has no parameters.

### Return Values

Returns the latency of this server.

### Errors/Exceptions

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

### Examples

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());
?>`

The above example will output something similar to:

    int(592)

### See Also

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