Did you run it on HHVM? That class is implemented in HHVM https://docs.hhvm.com/hack/reference/class/AsyncMysqlConnectionPool/ https://docs.hhvm.com/hack/refere

Did you run it on HHVM? That class is implemented in HHVM https://docs.hhvm.com/hack/reference/class/AsyncMysqlConnectionPool/ https://docs.hhvm.com/hack/reference/class/AsyncMysqlConnect...