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Connection and Authentication Parameters: These parameters control how clients connect and authenticate to Greenplum Database.
gp_vmem_idle_resource_timeout
listen_addresses
max_connections
max_prepared_transactions
superuser_reserved_connections
tcp_keepalives_count
tcp_keepalives_idle
tcp_keepalives_interval
unix_socket_directory
unix_socket_group
unix_socket_permissions
Security and Authentication Parameters
authentication_timeout
db_user_namespace
krb_caseins_users
krb_server_keyfile
krb_srvname
password_encryption
ssl
ssl_ciphers