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V4.3.1

What is ODP?
Installation and deployment
- Deployment modes
- Deploy ODP by using OCP
- Overview
- Deploy ODP by using the CLI
- Deploy ODP by using obd
Basic operations
Configuration parameter
- Parameter summary
- View and modify parameters
- Global parameters
  - cache_cleaner_clean_interval
  - check_tenant_locality_change
  - client_max_memory_size
  - client_sock_option_flag_out
  - client_tcp_user_timeout
  - cluster_count_high_water_mark
  - congestion_failure_threshold
  - default_inactivity_timeout
  - digest_sql_length
  - enable_async_log
  - enable_binlog_service
  - enable_cached_server
  - enable_flow_control
  - enable_global_ps_cache
  - enable_index_route
  - enable_prometheus
  - enable_qa_mode
  - enable_qos
  - enable_standby
  - enable_stat
  - enable_syslog_wf
  - enable_trace
  - flow_event_queue_threshold
  - grpc_thread_num
  - hot_upgrade_failure_retries
  - hot_upgrade_rollback_timeout
  - ip_listen_mode
  - client_sock_option_flag_out
  - client_tcp_user_timeout
  - cluster_count_high_water_mark
  - congestion_failure_threshold
  - default_inactivity_timeout
  - digest_sql_length
  - enable_global_ps_cache
  - enable_qa_mode
  - enable_syslog_wf
  - flow_event_queue_threshold
  - hot_upgrade_failure_retries
  - hot_upgrade_rollback_timeout
  - ip_listen_mode
  - local_bound_ip
  - log_dir_size_threshold
  - monitor_stat_high_threshold
  - partition_location_expire_relative_time
  - protocol_diagnosis_level
  - proxy_hot_upgrade_check_interval
  - rpc_enable_retry_request_info_log
  - rpc_force_srv_black_list
  - server_detect_mode
  - sock_send_buffer_size_out
  - tunnel_request_size_threshold
  - username_separator
  - server_state_refresh_interval
  - enable_reroute
  - log_file_percentage
  - sequence_prefetch_threshold
  - sock_recv_buffer_size_out
  - enable_congestion
  - current_local_config_version
  - xflush_log_level
  - enable_sync_all_stats
  - monitor_stat_middle_threshold
  - enable_get_rslist_remote
  - delay_update_entry_interval
  - rpc_server_net_max_pending_request
  - enable_monitor_stat
  - enable_primary_zone
  - client_max_connections
  - rpc_support_key_partition_shard_request
  - qa_mode_mock_public_cloud_slb_addr
  - server_tcp_keepidle
  - listen_port
  - stat_table_sync_interval
  - enable_extra_prometheus_metric
  - max_log_file_size
  - rootservice_list
  - flow_low_water_mark
  - rpc_server_entry_expire_time
  - enable_connection_diagnosis
  - rpc_enable_global_index
  - enable_performance_mode
  - enable_partition_table_route
  - rpc_server_net_invalid_time_us
  - fetch_proxy_bin_timeout
  - enable_syslog_file_compress
  - rpc_server_net_handler_expire_time
  - server_detect_fail_threshold
  - need_convert_vip_to_tname
  - sequence_entry_expire_time
  - rpc_net_timeout_base
  - server_tcp_init_cwnd
  - sqlaudit_mem_limited
  - monitor_cost_ms_unit
  - enable_single_leader_node_routing
  - long_async_task_timeout
  - congestion_fail_window
  - mem_leak_check_mod_name
  - fetch_proxy_bin_random_time
  - enable_bad_route_reject
  - monitor_item_limit
  - enable_sequence_prefetch
  - client_session_id_version
  - enable_sharding
  - block_thread_num
  - rpc_max_server_table_entry_num
  - enable_pl_route
  - ldg_info_refresh_interval
  - routing_cache_mem_limited
  - sock_option_flag_out
  - server_tcp_keepintvl
  - proxy_mem_limited
  - monitor_item_max_idle_period
  - enable_transaction_internal_routing
  - task_thread_num
  - detect_server_timeout
  - syslog_io_bandwidth_limit
  - enable_cpu_topology
  - rpc_enable_direct_expire_route_entry
  - skip_proxy_sys_private_check
  - client_tcp_keepidle
  - client_tcp_keepintvl
  - rpc_max_request_batch_size
  - tenant_location_valid_time
  - enable_cpu_isolate
  - proxy_local_cmd
  - config_server_refresh_interval
  - rpc_enable_congestion
  - hot_upgrade_exit_timeout
  - sock_packet_tos_out
  - skip_proxyro_check
  - min_keep_congestion_interval
  - enable_xa_route
  - rpc_listen_port
  - connect_observer_max_retries
  - refresh_json_config
  - shard_scan_thread_num
  - net_accept_threads
  - rpc_enable_force_srv_black_list
  - server_tcp_user_timeout
  - enable_abort_conn_info
  - enable_full_username
  - enable_async_pull_location_cache
  - automatic_match_work_thread
  - enable_obproxy_rpc_service
  - ignore_local_config
  - short_async_task_timeout
  - request_buffer_length
  - monitor_log_level
  - cluster_expire_time
  - enable_trans_detail_stats
  - grpc_client_num
  - rpc_srv_session_pool_inactive_timeout
  - enable_strict_stat_time
  - enable_ob_protocol_v2_with_client
  - rpc_request_timeout
  - monitor_stat_low_threshold
  - qos_stat_clean_interval
  - proxy_info_check_interval
  - local_bound_ipv6_ip
  - rpc_period_task_interval
  - mem_leak_check_class_name
  - prometheus_sync_interval
  - server_tcp_keepcnt
  - monitor_stat_dump_interval
  - obproxy_config_server_url
  - enable_ob_protocol_v2
  - client_tcp_keepcnt
  - sql_table_cache_expire_relative_time
  - internal_cmd_mem_limited
  - enable_strict_kernel_release
  - server_detect_refresh_interval
  - prometheus_cost_ms_unit
  - enable_client_connection_lru_disconnect
  - enable_client_ip_checkout
  - enable_proxy_scramble
  - rpc_enable_reroute
  - enable_causal_order_read
  - refresh_rslist
  - max_syslog_file_count
  - rpc_max_response_batch_size
  - idc_list_refresh_interval
  - stat_dump_interval
  - min_congested_connect_timeout
  - log_cleanup_interval
  - delay_exit_time
  - enable_compression_protocol
  - rpc_enable_parallel_handler
  - enable_cluster_checkout
  - rpc_request_timeout_delta
  - flow_consumer_reenable_threshold
  - sequence_fail_retry_count
  - default_buffer_water_mark
  - slow_transaction_time_threshold
  - congestion_retry_interval
  - net_config_poll_timeout
  - enable_trace_stats
  - connection_diagnosis_option
  - enable_report_session_stats
  - obproxy_sys_password
  - slow_proxy_process_time_threshold
  - flow_high_water_mark
  - enable_full_link_trace
- Multi-level parameters
  - obproxy_force_parallel_query_dop
  - proxy_primary_zone_name
  - enable_transaction_split
  - obproxy_read_consistency
  - read_stale_retry_interval
  - rootservice_cluster_name
  - proxy_route_policy
  - route_diagnosis_level
  - proxy_tenant_name
  - proxy_idc_name
  - binlog_service_ip
  - query_digest_time_threshold
  - enable_server_ssl
  - compression_algorithm
  - obproxy_read_only
  - enable_cloud_full_username
  - observer_query_timeout_delta
  - enable_weak_reroute
  - target_db_server
  - slow_query_time_threshold
  - observer_sys_password
  - mysql_version
  - ob_max_read_stale_time
  - ssl_attributes
  - enable_read_write_split
  - observer_sys_password1
  - enable_client_ssl
Connection management
- Principles
- Network connection
- Client session
- Session status synchronization
- Configure a globally unique client session ID
- Server session
Data routing
- Automatic routing to the primary/standby tenants
- Factors affecting data routing
- Character set-based routing
- ODP routing
- Follower latency threshold
- Read/Write separation
- Function partition key routing
  - String functions
  - Numeric calculation functions
  - Overview
  - FAQ
  - Date calculation functions
- Intra-tenant routing
  - IP address-based routing
  - Global index table-based routing for strong-consistency reads
  - Partitioned table-based routing for strong-consistency reads
  - Replicated table-based routing for strong-consistency reads
  - Strategy-based routing
  - Distributed transaction routing
  - Primary zone-based routing for strong-consistency reads
  - Forcible routing
  - Overview
  - Rerouting
Logs
- obproxy.log
- obproxy_stat.log
- obproxy_error.log
- obproxy_diagnosis.log
- obproxy_digest.log
- Overview
- obproxy_slow.log
Commands
- Overview
- Dedicated ODP commands
  - KILL
  - ALTER
  - ping
  - SHOW
- Compatible MySQL commands
  - SHOW RELAYLOG EVENTS
  - KILL
  - BINLOG
  - SHOW PROCESSLIST
  - SHOW SLAVE HOSTS
High availability mechanism
- High availability testing
- Overview
- High availability of ODP services
- High availability of OceanBase Database
Security and protocols
RPC service port
Operation and maintenance
- Troubleshooting logic
- Performance analysis
- Show Trace
- Routing diagnostics
  - Overview
  - Examples
  - Obtain diagnostic information
  - Diagnostic point troubleshooting
    - PARTITION_ENTRY_LOOKUP_DONE
    - PARTITION_ID_CALC_DONE
    - ROUTE_POLICY
    - HANDLE_RESPONSE
    - ROUTE_INFO
    - EXPR_PARSE
    - Overview
    - CONGESTION_CONTROL
    - RESOLVE_TOKEN
    - SQL_PARSE
    - FETCH_TABLE_RELATED_DATA
    - LOCATION_CACHE_LOOKUP
    - ROUTINE_ENTRY_LOOKUP_DONE
    - RESOLVE_EXPR
    - CALC_ROWID
    - CALC_PARTITION_ID
    - TABLE_ENTRY_LOOKUP_DONE
    - RETRY
- Memory leak diagnostics
- Connection diagnostics
Release Notes
- Versioning rules
- Enterprise Edition
  - V3.2
    - ODP Enterprise Edition V3.2.11
    - ODP Enterprise Edition V3.2.3.5
  - V4.3
    - ODP Enterprise Edition V4.3.1
    - ODP Enterprise Edition V4.3.0
  - V4.2
    - ODP Enterprise Edition V4.2.3
    - ODP Enterprise Edition V4.2.2
    - ODP Enterprise Edition V4.2.1
  - V4.0
    - ODP Enterprise Edition V4.0.0
  - V4.1
    - ODP Enterprise Edition V4.1.0
- Community Edition
  - V4.2
    - ODP Community Edition V4.2.0
    - ODP Community Edition V4.2.1
    - ODP Community Edition V4.2.3
  - V4.3
    - ODP Community Edition V4.3.1
  - V4.0
    - ODP Community Edition V4.0.0
  - V4.1
    - ODP Community Edition V4.1.0

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SHOW RELAYLOG EVENTS

Last Updated：2026-04-14 09:41:35 Updated

Note

Only the keyword syntax is supported. The functionality does not actually take effect. This statement returns an empty result set.

Purpose

You can use this statement to query the event information in the relay log of a replica. If you do not specify log_name, the first relay log is queried by default.

Syntax

SHOW RELAYLOG EVENTS
    [IN 'log_name']
    [FROM pos]
    [LIMIT [offset,] row_count]
    [channel_option]

channel_option:
    FOR CHANNEL channel

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