How to Disable Microseconds Precision (for a Performance Boost)

Warning: You are browsing the documentation for Symfony 3.x, which is no longer maintained.

Consider upgrading your projects to Symfony 7.3.

Setting the parameter use_microseconds to false forces the logger to reduce the precision in the datetime field of the log messages from microsecond to second, avoiding a call to the microtime(true) function and the subsequent parsing. Disabling the use of microseconds can provide a small performance gain speeding up the log generation. This is recommended for systems that generate a large number of log events.

        1
2
3
4
5
6
7
8
        # app/config/config.yml
monolog:
    use_microseconds: false
    handlers:
        applog:
            type: stream
            path: /var/log/symfony.log
            level: error
    

        1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
        <!-- app/config/config.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:monolog="http://symfony.com/schema/dic/monolog"
    xsi:schemaLocation="http://symfony.com/schema/dic/services
        https://symfony.com/schema/dic/services/services-1.0.xsd
        http://symfony.com/schema/dic/monolog
        https://symfony.com/schema/dic/monolog/monolog-1.0.xsd">

    <monolog:config use-microseconds="false">
        <monolog:handler
            name="applog"
            type="stream"
            path="/var/log/symfony.log"
            level="error"
        />
    </monolog:config>
</container>
    

        1
2
3
4
5
6
7
8
9
10
11
        // app/config/config.php
$container->loadFromExtension('monolog', [
    'use_microseconds' => false,
    'handlers' => [
        'applog' => [
            'type'  => 'stream',
            'path'  => '/var/log/symfony.log',
            'level' => 'error',
        ],
    ],
]);
    

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.

TOC

Version