GNU Artanis will create a connection pool when you run art work. Its size is decided by db.poolsize. The pool is increasing by default for development and test. It is strongly recommended you to set db.pool to fixed when you deploy. The increasing pool will cause the effects that is similar to the memory leak. If you set it to fixed, then the request handler will be safely scheduled when there’s no available DB connection, and it will be awake when it’s available.