http://symfony.com/legacy/doc/gentle-introduction/1_4/en/16-Application-Management-Tools#chapter_16_sub_symfony_logs

Log levels: emerg, alert, crit, err, warning, notice, info, and debug

Set log level:

• frontend/config/factories.yml
  • dev:
      logger:
        param:
          level: err

Log from anywhere:

• ullCoreTools::sfLog($level, $message)

View log

• ksystemlog
  • apt-get install ksystemlog
  • Provides good and simple filter option
• Or on the command line
  • tail -f log/frontend_dev.log | grep xyz

Log in the production environment

http://blog.jetienne.com/2009/05/symfony-and-log-in-prod.html

settings.yml

• prod:
    .settings:
      logging_enabled:        on

factories.yml

• prod:
    logger:
      class:   sfFileLogger
      param:
        level:   err
        loggers: ~
        file: %SF_LOG_DIR%/%SF_APP%_%SF_ENVIRONMENT%.log
  

Enable MySQL binary log

• sudo vi /etc/mysql/my.cnf
  • Uncomment line starting with "log_bin"
• sudo /etc/init.d/mysql restart

View log:

• mysqlbinlog /var/log/mysql/mysql-bin.000001