we're back @yomiel @cabanela @jimmy @VIPPER HINT: This error does not mean that you have run out of disk space. It occurs when either the system limit for the maximum number of semaphore sets (SEMMNI), or the system wide maximum number of semaphores (SEMMNS), would be exceeded. You need to raise the respective kernel parameter. Alternatively, reduce PostgreSQL's consumption of semaphores by reducing its "max_connections" parameter.
The PostgreSQL documentation contains more information about configuring your system for PostgreSQL.