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Start on Cloud

A unified distributed database ready for your transactional, analytical, and AI workloads.

DEPLOY YOUR WAY

OceanBase Cloud

The best way to deploy and scale OceanBase

OceanBase Enterprise

Run and manage OceanBase on your infra

TRY OPEN SOURCE

OceanBase Community Edition

The free, open-source distributed database

OceanBase seekdb

Open source AI native search database

Customer Stories

Real-world success stories from enterprises across diverse industries.

View All
BY USE CASES

Mission-Critical Transactions

Global & Multicloud Application

Elastic Scaling for Peak Traffic

Real-time Analytics

Active Geo-redundancy

Database Consolidation

Comprehensive knowledge hub for OceanBase.

Blog

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Official technical guides, tutorials, API references, and manuals for all OceanBase products.

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OceanBase Database Proxy

V4.3.0

  • What is ODP?
  • Installation and deployment
    • Deployment modes
    • Deploy ODP by using OCP
    • Overview
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  • Basic operations
  • Configuration parameter
    • Parameter summary
    • View and modify parameters
    • Global parameters
      • check_tenant_locality_change
      • client_max_memory_size
      • enable_async_log
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      • enable_cached_server
      • enable_flow_control
      • enable_index_route
      • enable_prometheus
      • enable_qos
      • enable_standby
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      • grpc_thread_num
      • max_syslog_file_time
      • metadb_server_state_refresh_interval
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      • prometheus_listen_port
      • proxy_id
      • refresh_idc_list
      • server_routing_mode
      • sock_packet_mark_out
      • sql_table_cache_mem_limited
      • stack_size
      • syslog_level
      • work_thread_num
      • cluster_count_high_water_mark
      • congestion_failure_threshold
      • default_inactivity_timeout
      • 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
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      • need_convert_vip_to_tname
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      • routing_cache_mem_limited
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      • client_tcp_keepintvl
      • task_thread_num
      • tenant_location_valid_time
      • rpc_enable_direct_expire_route_entry
      • config_server_refresh_interval
      • rpc_max_request_batch_size
      • hot_upgrade_exit_timeout
      • rpc_enable_congestion
      • min_keep_congestion_interval
      • shard_scan_thread_num
      • rpc_listen_port
      • enable_abort_conn_info
      • refresh_json_config
      • enable_obproxy_rpc_service
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      • rootservice_list
      • server_tcp_user_timeout
      • enable_trans_detail_stats
      • enable_full_username
      • rpc_enable_force_srv_black_list
      • automatic_match_work_thread
      • monitor_cost_ms_unit
      • ignore_local_config
      • short_async_task_timeout
      • request_buffer_length
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      • monitor_stat_low_threshold
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      • proxy_idc_name
      • binlog_service_ip
      • query_digest_time_threshold
      • enable_server_ssl
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      • 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
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    • Principles
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      • 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
      • Replication 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
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    • High availability testing
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  • Security and protocols
  • Operation and maintenance
    • Troubleshooting logic
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    • 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
      • V4.2
        • 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
      • V4.3
        • ODP Enterprise Edition V4.3.0
    • Community Edition
      • V4.2
        • ODP Community Edition V4.2.0
        • ODP Community Edition V4.2.1
        • ODP Community Edition V4.2.3
      • V4.0
        • ODP Community Edition V4.0.0
      • V4.1
        • ODP Community Edition V4.1.0

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What is ODP? Deployment modes Deploy ODP by using OCP Overview Deploy ODP by using the CLI Use OBD to deploy ODP Basic operations Parameter summary View and modify parameters check_tenant_locality_change client_max_memory_size enable_async_log enable_binlog_service enable_cached_server enable_flow_control enable_index_route enable_prometheus enable_qos enable_standby enable_stat enable_trace grpc_thread_num max_syslog_file_time metadb_server_state_refresh_interval normal_pl_update_threshold prometheus_listen_port proxy_id refresh_idc_list server_routing_mode sock_packet_mark_out sql_table_cache_mem_limited stack_size syslog_level work_thread_num cluster_count_high_water_mark congestion_failure_threshold default_inactivity_timeout 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 qos_stat_item_limit qos_stat_item_limit rpc_enable_retry_request_info_log server_detect_mode sock_send_buffer_size_out tunnel_request_size_threshold username_separator cache_cleaner_clean_interval digest_sql_length rpc_force_srv_black_list client_sock_option_flag_out 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 server_tcp_keepintvl flow_low_water_mark sock_packet_tos_out enable_connection_diagnosis rpc_server_entry_expire_time enable_performance_mode enable_sharding block_thread_num rpc_server_net_invalid_time_us rpc_enable_global_index enable_syslog_file_compress enable_partition_table_route server_detect_fail_threshold fetch_proxy_bin_timeout sequence_entry_expire_time rpc_server_net_handler_expire_time
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request_buffer_length

Last Updated:2026-04-14 09:41:35  Updated
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request_buffer_length specifies the maximum length of the request buffer allocated to each request.

Attribute Description
Parameter type Capacity
Default value 4KB
Value range [1KB, 16MB]
Effective only after ODP restart No

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