To guarantee the instance stability and security, ApsaraDB for PPAS has the following restrictions.
|Modify database parameter settings||Currently not supported|
|Database root permission||RDS does not offer the superuser permission to users.|
|Database backup||You can back up data only through pg_dump.|
|Data migration to the cloud||You can only use psql to restore data backed up by pg_dump.|
|Set up database replication||
|Restart an RDS instance||You must restart an instance through the RDS console or APIs.|
|Network settings||If the access mode of the instance is safe connection mode, enabling net.ipv4.tcp_timestamps in SNAT mode is not allowed.|