Drupal doesn't seem to utilize database slaves











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We are using an AWS RDS cluster for our Drupal databases.



Our Drupal configuration for $databases consist of a default and a slave, but when I look at the usage(1), it seems like Drupal never uses the slave.
Is that just because it suffices with the master, or could we lack configuration?



$databases = array(

  'default' => array(

    'default' => array(

      'driver' => $_ENV['DatabaseDriver'],

      'host' => $_ENV['DatabaseHostMaster'],

      'database' => $_ENV['DatabaseName'],

      'username' => $_ENV['DatabaseUsername'],

      'password' => $_ENV['DatabasePassword']

    )

  )

);



if (!empty($_ENV['DatabaseHostSlave'])) {

  $databases['default']['slave'] = array(

    'driver' => $_ENV['DatabaseDriver'],

    'host' => $_ENV['DatabaseHostSlave'],

    'database' => $_ENV['DatabaseName'],

    'username' => $_ENV['DatabaseUsername'],

    'password' => $_ENV['DatabasePassword']

  );

}


We use a mix of Drupal 7 and 8.



DatabaseConnections






drupal amazon-rds amazon-rds-aurora







share|improve this question


























    up vote
    0
    down vote

    favorite












    We are using an AWS RDS cluster for our Drupal databases.



    Our Drupal configuration for $databases consist of a default and a slave, but when I look at the usage(1), it seems like Drupal never uses the slave.
    Is that just because it suffices with the master, or could we lack configuration?



    $databases = array(
    
  'default' => array(
    
    'default' => array(
    
      'driver' => $_ENV['DatabaseDriver'],
    
      'host' => $_ENV['DatabaseHostMaster'],
    
      'database' => $_ENV['DatabaseName'],
    
      'username' => $_ENV['DatabaseUsername'],
    
      'password' => $_ENV['DatabasePassword']
    
    )
    
  )
    
);
    

    
if (!empty($_ENV['DatabaseHostSlave'])) {
    
  $databases['default']['slave'] = array(
    
    'driver' => $_ENV['DatabaseDriver'],
    
    'host' => $_ENV['DatabaseHostSlave'],
    
    'database' => $_ENV['DatabaseName'],
    
    'username' => $_ENV['DatabaseUsername'],
    
    'password' => $_ENV['DatabasePassword']
    
  );
    
}


    We use a mix of Drupal 7 and 8.



    DatabaseConnections






    drupal amazon-rds amazon-rds-aurora







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      We are using an AWS RDS cluster for our Drupal databases.



      Our Drupal configuration for $databases consist of a default and a slave, but when I look at the usage(1), it seems like Drupal never uses the slave.
      Is that just because it suffices with the master, or could we lack configuration?



      $databases = array(
      
  'default' => array(
      
    'default' => array(
      
      'driver' => $_ENV['DatabaseDriver'],
      
      'host' => $_ENV['DatabaseHostMaster'],
      
      'database' => $_ENV['DatabaseName'],
      
      'username' => $_ENV['DatabaseUsername'],
      
      'password' => $_ENV['DatabasePassword']
      
    )
      
  )
      
);
      

      
if (!empty($_ENV['DatabaseHostSlave'])) {
      
  $databases['default']['slave'] = array(
      
    'driver' => $_ENV['DatabaseDriver'],
      
    'host' => $_ENV['DatabaseHostSlave'],
      
    'database' => $_ENV['DatabaseName'],
      
    'username' => $_ENV['DatabaseUsername'],
      
    'password' => $_ENV['DatabasePassword']
      
  );
      
}


      We use a mix of Drupal 7 and 8.



      DatabaseConnections






      drupal amazon-rds amazon-rds-aurora







      share|improve this question













      We are using an AWS RDS cluster for our Drupal databases.



      Our Drupal configuration for $databases consist of a default and a slave, but when I look at the usage(1), it seems like Drupal never uses the slave.
      Is that just because it suffices with the master, or could we lack configuration?



      $databases = array(
      
  'default' => array(
      
    'default' => array(
      
      'driver' => $_ENV['DatabaseDriver'],
      
      'host' => $_ENV['DatabaseHostMaster'],
      
      'database' => $_ENV['DatabaseName'],
      
      'username' => $_ENV['DatabaseUsername'],
      
      'password' => $_ENV['DatabasePassword']
      
    )
      
  )
      
);
      

      
if (!empty($_ENV['DatabaseHostSlave'])) {
      
  $databases['default']['slave'] = array(
      
    'driver' => $_ENV['DatabaseDriver'],
      
    'host' => $_ENV['DatabaseHostSlave'],
      
    'database' => $_ENV['DatabaseName'],
      
    'username' => $_ENV['DatabaseUsername'],
      
    'password' => $_ENV['DatabasePassword']
      
  );
      
}


      We use a mix of Drupal 7 and 8.



      DatabaseConnections






      drupal amazon-rds amazon-rds-aurora




      drupal amazon-rds amazon-rds-aurora






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 20 hours ago









      webjay

      2,42373042




      2,42373042





























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