Group Replication System Variables can choose whether a member is marked online after it has received and certified all transactions that it missed before it joined the group ( TRANSACTIONS_CERTIFIED ), or only after it has received, certified, and applied them ( TRANSACTIONS_APPLIED ). • group_replication_recovery_compression_algorithms The value of this system variable can be changed while Group Replication is running, but the change only takes effect after you stop and restart Group Replication on the group member. group_replication_recovery_compression_algorithms  specifies the compression algorithms permitted for Group Replication distributed recovery connections for state transfer from a donor’s binary log. The available algorithms are the same as for the  protocol_compression_algorithms  system variable. For more information, see Section 4.2.8, “Connection Compression Control” . This setting does not apply if the server has been set up to support cloning (see Section 18.5.3.2, “Cloning for Distributed Recovery” ) and a remote cloning operation is used during distributed recovery. For this method of state transfer, the clone plugin’s  clone_enable_compression  setting applies. • group_replication_recovery_get_public_key The value of this system variable can be changed while Group Replication is running, but the change only takes effect after you stop and restart Group Replication on the group member. group_replication_recovery_get_public_key  specifies whether to request from the source the public key required for RSA key pair-based password exchange. If group_replication_recovery_public_key_path  is set to a valid public key file, it takes Command-Line Format --group-replication-recovery- compression-algorithms=value Introduced 8.0.18 System Variable Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Set Default Value uncompressed Valid Values zlib zstd uncompressed Command-Line Format --group-replication-recovery-get- public-key[={OFF|ON}] System Variable Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Boolean Default Value OFF 3822