Manual:InitEditCount.php/pt-br

Detalhes
O arquivo initEditCount.php é um script de manutenção para inicializar o campo   do banco de dados, com base no número de linhas na tabela de revision.

Options
initEditCount.php accepts two options.

Background mode will be automatically used if multiple servers are listed in the load balancer, usually indicating a replication environment. So first it calculates counts of replica DB if it found it then script run job in background mode to avoids locking tables or lagging replica DBs with large updates.