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# Collect the checksum information about columns

Last Updated：2025-01-10 06:15:54 Updated

Description

You can query the column_checksum information.

Statement

OceanBase Database V4.0.0 and later:

SELECT * FROM CDB_OB_COLUMN_CHECKSUM_ERROR_INFO;

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OceanBase Cloud Platform

V4.3.3

Document Overview
Product Introduction
- What is OceanBase Cloud Platform?
- Differences between the features of OCP Enterprise Edition and OCP Community Edition
- System architecture
- Features
- Limits
  - System requirements
  - Dependencies
Deploy OceanBase Cloud Platform (OCP)
- Deploy OceanBase Cloud Platform (OCP) Enterprise Edition
  - Deployment overview
    - Deploy OCP cluster in the Single-node
    - Deploy OCP cluster in the High-availability
  - Prepare the deployment environment
    - Install OAT
    - Add a server
    - Check the environment
  - Deploy OCP
    - Plan resources
      - Planning resources of a single node OCP
        OCP-Server specifications
        MetaDB resources
        MonitorDB resources
        Host resources
      - Planning resources of a high availability OCP
        OCP-Server specifications
        MetaDB resources
        MonitorDB resources
        Host resources
    - Deploy OCP
      - Deploying a single point of OCP
        Prepare installation media
        Create MetaDB
        Install OCP
        Initialize system parameters
      - Deploying a high availability of OCP
        Prepare installation media
        Create MetaDB
        Install OCP
        Register an OCP cluster
        Initialize system parameters
    - Check after deployment
  - Deployment FAQ
    - Optimize MonitorDB parameters
    - F5 Big-IP LTM and alert configuration
      - Connect OBProxy to F5 Big-IP LTM
      - Connect OCP-Console to F5 Big-IP LTM
      - Monitor the OCP service health
    - Ubuntu deployment FAQ
    - EulerOS deployment FAQ
    - Client requirements
    - Start and stop OCP
  - Appendix
    - Uninstall OCP
    - Check the NTP offset
- Deploy OceanBase Cloud Platform (OCP) Community Edition
  - Overview
  - Installation process
  - Installation planning
    - User planning
    - Host planning
    - Disk and directory planning
    - Port planning
  - Prepare for the installation
  - Deploy OCP on the GUI
  - Use Docker to deploy OCP
  - Post-deployment check
  - Appendix
    - Install Docker
    - Uninstall OCP
    - Restart OCP
    - FAQ about deployment
Upgrade OceanBase Cloud Platform (OCP)
- Upgrade OceanBase Cloud Platform (OCP) Enterprise Edition
  - Overview
  - Considerations
  - Preparations
  - Upgrade OCP
    - Take over OCP
    - Upgrade OCP
  - Verify after upgrade
    - Verify the cluster feature
    - Verify the tenant feature
    - Verify the host feature
    - Verify the software package feature
    - Verify the OBProxy feature
    - Verify the backup and restore feature
    - Verify the alert feature
    - Verify the task feature
    - Verify the password box feature
  - Appendix
    - Change a user's password
    - Version mapping
- Upgrade OceanBase Cloud Platform (OCP) Community Edition
  - Upgrade OCP on the GUI
  - Upgrade OCP using Docker containers
  - Post-upgrade check
Quick Start
- OCP operations
- Log on to the OCP console
- Upload a software package
- Add a host
- Create a cluster
- Create a tenant
- Create a user
- Create an OBProxy cluster
Cluster Management
- Overview
- Create a cluster
  - Create a distributed cluster
  - Create a standalone centralized database
- Manage clusters
  - Create a standby cluster
  - View the details of a cluster
  - Upgrade a standalone centralized database to a distributed cluster
  - Take over a cluster
  - Restart a cluster
  - Stop a cluster
  - Move out a cluster
  - Delete a cluster
  - Change the password
  - Enable automatic detection of deadlocks
  - Disable automatic detection of deadlocks
  - Manage O&M configuration
    - Overview
    - Manage parameters
    - View the parameter modification history
  - Manage CPU binding configurations
- Manage Arbitration Service
  - Arbitration service Overview
  - Create an arbitration service
  - Take over an arbitration service
  - Stop an arbitration service
  - Start an arbitration service
  - Upgrade an arbitration service
  - Restart an arbitration service
  - Migrate an arbitration service
  - Delete an arbitration service
  - Add an arbitration service
  - Replace an arbitration service
  - Remove an arbitration service
- Manage zones of a cluster
  - Add a zone
  - Edit a zone
  - Restart a zone
  - Stop a zone
  - Delete a zone
- Manage OBServers of a cluster
  - Add an OBServer node
  - Restart a faulty OBServer node
  - Stop an OBServer service
  - Stop the observer process
  - Replace an OBServer node
  - Reinstall an OBServer
  - Delete an OBServer
- Upgrade an OceanBase cluster
- View the topology of a cluster
- Overview of cluster tenant management
- Manage cluster resource
  - View the unit distribution
  - View resource usage
- Manage major compaction of a cluster
  - Modify the major compaction settings of a cluster
  - Perform a major compaction
  - View details of a major compaction
  - View statistics of a major compaction
- Manage cluster parameter templates
- Manage cluster parameters
  - Parameter types
  - View parameters
  - Modify parameters
  - View the history of parameter changes
Tenant Management
- Tenant and resource management
- View tenant overview information
- Create a primary tenant
- Manage unit specifications
- View OCP resource unit specifications
- Manage tenants
  - View the details of a tenant
  - Create a standby tenant
  - Copy a tenant
  - Rename a tenant
  - Lock a tenant
  - Clone a tenant
  - Delete a tenant
  - Change the password of the sys tenant
  - Configure full link tracking for a tenant
  - Modify the allowlist of a tenant
  - Modify zone priorities
  - Manage the binlog service for a tenant
  - Manage service names
- Manage topulogy of a tenant
  - View the topology of a tenant
  - View the topology of primary/standby relationships of a tenant
- Manage replicas of a tenant
  - Add a replica
  - Edit a tenant replica in a zone
  - Delete a tenant replica from a zone
- Manage databases
- Manage users and permissions under a tenant
  - Manage users in a MySQL tenant
  - Manage user under an Oracle tenant
    - User overview under an Oracle tenant
    - Create a user under an Oracle tenant
    - Change the password of a user under an Oracle tenant
    - Delete a user under an Oracle tenant
    - Create a role under an Oracle tenant
    - Manage users
    - Manage roles
  - System privileges in a MySQL tenant
- Manage resource isolation
  - Overview
  - Create a resource group
  - Create a resource isolation plan
  - Enable or disable a resource isolation plan
  - Modify a resource isolation plan
  - Delete a resource isolation plan
  - Modify a resource group
  - Delete a resource group
- Manage the resources of a tenant
- Manage major compaction under a tenant
  - Modify major compaction settings of a tenant
  - View details of tenant major compaction
  - Perform a major compaction
- Manage statistical information
  - Overview
  - Collect statistics
  - Manage statistics collection tasks
- Manage tenant parameter templates
- Manage tenant parameters
  - View the parameters
  - Modify a parameter
  - View the parameter modification history
OBProxy Management
- OBProxy management overview
- View details on the OBProxy page
- Create an OBProxy cluster
- Manage OBProxy Clusters
  - View details on the Overview page of an OBProxy cluster
  - Add a connectable OceanBase cluster
  - Manage load balancing
  - Change the password of the proxysys user
  - Change the password of the proxyro user
  - Move out an OBProxy cluster
  - Delete an OBProxy cluster
  - Upgrade an OBProxy cluster
  - Manage CPU core binding configurations
  - Stop or start an ODP cluster
  - Restart an ODP cluster
  - Delete a connected OceanBase cluster
  - Manage the proxyro account
- Manage OBProxy Servers
  - Add an OBProxy
  - Take over an OBProxy
  - Delete an OBProxy
  - Restart an OBProxy
  - Stop or start an OBProxy
  - Remove an OBProxy
  - Launch an OBProxy
  - Upgrade an OBProxy
  - Refresh OBProxy configurations
- Request analysis
- Parameter management
- Client configuration
- OBProxy parameters descpription
Binlog Service Management
- Binlog service overview
- Create a binlog cluster
- Manage Binlog Clusters
  - View information about a binlog cluster
  - Start and stop a binlog cluster
  - Restart a binlog cluster
  - Delete a binlog cluster
  - Manage Binlog Instance
    - View a binlog instance
    - Configure throttling
    - Start and stop a binlog instance
    - Restart a binlog instance
    - Manage binlog instance parameters
  - Manage Binlog Server
    - Add a binlog node
    - Start and stop a binlog server
    - Delete a binlog server
    - Clear binlog instances on a host
- Manage binlog cluster parameters
Host Management
- Host management operations
- View details of a host
- Add a host
- View the details of tasks on a host
- Modify a host
- Restart OCP-Agent
- Reinstall OCP Agent
- Remove a host
- Perform host standardization checks
- Host standardization check items
- OCP-Agent processes
- OCP-Agent O&M Script Instructions
Alert Management
- Overview
- Alert-related concepts
- Manage alert rules
  - Create an alert rule
  - View an alert rule
  - Copy an alert rule
  - Edit an alert rule
  - Delete an alert rule
  - Alert rule groups
  - Export alert rule configurations
- Manage alert templates
  - Create an alert template
  - Set alert objects
  - Export alert templates
  - View an alert template
  - Copy an alert template
  - Edit an alert template
  - Delete an alert template
- Manage alert channels
  - Create an alert channel
  - View an alert channel
  - Edit an alert channel
  - Copy an alert channel
  - Delete an alert channel
  - Examples of alert channel configuration
  - Examples of alert channel configuration
- Manage alert push
  - Create an alert push
  - View an alert push
  - Edit an alert push
  - Delete an alert push
- View alert events
- Manage blocking conditions
  - Create a blocking condition
  - Edit an alert blocking condition
  - Delete an alert blocking condition
- OCP alert template tag
- Optional monitoring metrics for custom alerts
Dashboard Management
- Monitoring dashboard overview
- Manage dashboards
- Manage groups
- Manage charts
Performance Monitoring
- Manage monitoring
  - Overview
  - View database performance data
  - View host performance data
  - View OBServer node performance data
  - View the performance and SQL monitoring data of a tenant
  - View transaction performance data
  - View storage and cache monitoring data
  - View database object monitoring data
  - View OBKV-Table monitoring data
  - View OBKV-HBase monitoring data
  - View subscription connection monitoring charts
  - View performance monitoring data of a binlog instance
  - View resource monitoring data of a binlog instance
  - View host resource monitoring data
  - View host process monitoring data
  - View service monitoring data
  - View system monitoring data
  - View performance monitoring
  - Drill-down monitoring
  - Integrate monitoring data to an external time-series system
- Use the custom monitoring feature
  - Overview
  - View collection items
  - Manage indicator items
    - Create a metric
    - Manage metrics
  - Manage charts
    - Create a chart
    - Manage charts
  - OCP metrics
Diagnostics and Tuning
- SQL Diagnostics
  - SQL Diagnostics Introduction
    - SQL diagnostics overview
    - SQL statement execution statistics
    - SQL execution plans
  - View the OceanBase Autonomy Service page
  - Diagnose suspicious SQL statements
  - Diagnose top SQL statements
  - View Comparison of Top SQL Statements
  - Diagnose slow SQL statements
  - Diagnose parallel SQL statements
  - Diagnose high-risk SQL statements
  - Diagnose new SQL statements
  - View details of an SQL statement
  - View outlines
  - View the SQL collection enable/disable history
  - View SQL request analysis
  - Parameters related to SQL performance diagnostics
- Transaction Diagnostics
  - Overview of transaction
  - Diagnose transactions
  - Diagnose XA transactions and suspended transactions
- Manage sessions
  - Manage the sessions of a tenant
  - View session statistics
  - View row lock analytics
  - # View row lock analytics
- View the Optimization Center page
- View the capacity center
- View diagnostics reports
  - Manage ASH reports
  - Performance report
O&M Management
- Manage Information Collection
  - Overview
  - Configure information collection items
  - Create an information collection task
  - View information collection details
  - Download an information collection report
- Manage Plans
  - Overview
  - Manage plans
  - View plan execution details
- Manage Inspection
  - Inspection
  - Configure inspection items
  - Configure Scheduling Rules
    - Configure a scheduling rule for a single object
    - Configure a global scheduling rule
  - Initiate Inspection
    - Initiate an inspection for a single object
    - Initiate a global inspection
  - View an inspection task
  - Manage Inspection reports
    - View an inspection report
    - Download an inspection report
Backup and Recovery
- Overview
- Backup and restore guide
- Overview
- Backup now
  - Back up cluster now
  - Back up a tenant now
- Regular backup
  - Manage cluster-level backup strategy
    - Create a cluster-level backup strategy
    - Modify a cluster-level backup strategy
    - Delete a cluster-level backup strategy
    - Pause backup scheduling
    - View a cluster-level backup stategy
  - Manage tenant-level backup strategy
    - Create a tenant-level backup strategy
    - Modify a tenant-level backup strategy
    - Delete a tenant-level backup strategy
    - Pause backup scheduling
    - View a tenant-level backup stategy
- Manage backup tasks
  - View backup tasks
  - View second backup tasks
- Initiate a restore task
- Regular recovery
  - Create a sampling strategy for recovery
  - View sampling strategies
  - View sampling tasks
- View restore tasks
- Manage backup and recovery service
  - View services
  - Install a service
  - Add a node
  - Upgrade the version of a service
  - Update service configurations
  - Copy a service
  - Delete a service
  - Stop a service on a node
  - Restart a service on a node
  - View O\&M tasks
  - Uninstall a service on a node
Disaster Recovery
- Switching primary and standby tenants
  - Switchover
  - Failover
  - Decouple a standby tenant from its primary tenant
  - Create a standby tenant for a primary tenant managed by another OCP cluster
- Switching primary and standby databases
  - Routine primary/standby cluster switchover
  - Primary/Standby cluster switchover for disaster recovery
  - Decouple a standby cluster from the primary cluster
  - Start the original primary cluster in read-only mode after a failover
- OCP Manage OCP clusters in the multi-cluster mode
  - OCP multi-cluster mode overview
  - Register an OCP cluster
  - View Leader \& Follower Details
  - Manage OCP cluster parameters
  - Switch an OCP cluster in daily maintenance
  - Switch an OCP cluster in a failover
  - Delete a faulty follower OCP cluster
  - Unbind a leader and a follower OCP cluster
  - Enable the OCP multi-cluster mode
Log Management
- Query logs
- Download logs
- Configure trace query parameters
- Trace query
- About OpenSearch
Software Package Management
- Upload a software package
- Download a software package
- Delete a software package
System Management
- Manage password box
  - Create a credential
  - Export a credential
  - Import a credential
  - Verify a credential
  - Edit a credential
  - Delete a credential
  - Batch operations on credentials
- Manage users
  - Manage a user
    - Users overview
    - Create a user
    - View users
    - Edit a user
    - Copy a user
    - Change a user password
    - Delete a user
    - Logon history
  - Manage a role
    - Role overview
    - Create a role
    - Copy a role
    - View a role
    - Edit a role
    - Delete a role
    - Default OCP roles
- Manage tags
  - Overview
  - Create a tag
  - Modify objects bound to a tag
  - Edit a tag
  - Delete a tag
- View operation records
- Manage external integration
  - # Overview
  - # Create an SSO integration task
  - # Enable/Disable an SSO integration task
  - # Edit an SSO integration task
  - # Delete an SSO integration task
- Manage system parameters
  - View system parameters
  - Modify system parameters
  - OCP configuration parameters
- Manage tasks
- User center management
  - Configure personal information
  - Change your logon password
  - Log off the OCP console
SQL Tuning Practices
- Locate General Abnormal SQL Statements
  - How can I locate SQL statements with high CPU load in a tenant?
  - How can I locate slow SQL statements that take a long time in a tenant?
  - How can I locate SQL statements for full-table scans in a tenant?
  - How can I locate distributed SQL statements in a tenant?
  - How can I locate remote SQL statements in a tenant?
  - How can I locate slow hard-parsed SQL statements in a tenant?
  - How can I locate erroneous SQL statements in a tenant?
- Customize Abnormal SQL Statement Determining Rules
  - Conditions
  - Custom column rules
- General SQL Performance Tuning Scenarios
  - Execution Plan Optimization
    - SQL statement performance deterioration caused by plan changes
  - Index Optimization
    - No suitable indexes
    - Inappropriate index of an SQL statement
    - Invalid index of an SQL statement
O&M Best practices
- Upgrade an OceanBase cluster
- Migrate a resource unit from an OceanBase Database tenant
- Expand the high availability of OceanBase clusters and tenants
- Reduce the high availability of OceanBase clusters and tenants
- Scale out an OceanBase cluster and scale up an OceanBase Database tenant
- Scale in an OceanBase cluster and scale down an OceanBase Database tenant
- Troubleshoot host issues in an OceanBase cluster
- Migrate a cluster between IDCs in OCP
- Migrate an OceanBase cluster to another IDC
- Perform a failover between primary and standby OceanBase clusters for disaster recovery in a scenario with two IDCs
- Perform a switchover between primary and standby OceanBase Database tenants in a scenario with two IDCs
- Use the arbitration service of OceanBase Database to achieve HA in a scenario with two IDCs
- Scale out an OBProxy cluster
- Scale in an OBProxy cluster
- Replace an OBProxy
- Move out an OBProxy cluster
- Take over OBProxies
- Delete an OBProxy
- Perform a failover
- Decouple a standby tenant from the primary tenant
- Automatic routing to the new primary tenant after a switchover
- Back up an OceanBase cluster
- Use the backup and restore module to restore data
- Monitor the business load of OceanBase Database
- Integrate OCP monitoring into Prometheus
- Configure custom monitoring
- Perform an inspection in OCP to detect potential risks in an OceanBase cluster
- Check clog synchronization
- Check the NIC rate
- Check the availability of an auto-increment column
- Send alert messages to a DingTalk group
- Send alert messages to a Feishu group
- Send alert messages to a WeChat Enterprise group
- Send alert messages through email
- Push alert messages through HTTP
Reference Guide
- Alarm reference
  - Overview
  - OceanBase alerts
    - ob_cannot_connected
    - ob_cluster_rs_not_same
    - ob_cluster_status_check_failed
    - ob_cluster_exists_inactive_server
    - ob_cluster_exists_index_fail_table
    - ob_cluster_frozen_version_delta_over_threshold
    - ob_cluster_merge_error
    - ob_cluster_merge_timeout
    - ob_cluster_no_frozen
    - ob_cluster_no_merge
    - ob_cluster_operation_info
    - ob_cluster_sync_failed
    - ob_cpu_assigned_percent_over_threshold
    - ob_cpu_percent_over_threshold
    - ob_host_connection_percent_over_threshold
    - ob_host_disk_readonly
    - ob_tenant_expired_trans_exist
    - ob_host_load1_per_cpu_over_threshold
    - ob_host_partition_count_over_threshold
    - OceanBase log alerts
    - ob_mem_assigned_percent_over_threshold
    - ob_server_sstable_percent_over_threshold
    - ob_tenant_long_trans_exist
    - ob_tenant_operation_info
    - ob_tenant500_mem_hold_over_threshold
    - ob_tenant500_mem_hold_percent_over_threshold
    - tenant_active_memstore_percent_over_threshold
    - tenant_cpu_percent_over_threshold
    - tenant_memstore_percent_over_threshold
    - obproxy_process_dead
    - obproxyd_process_dead
    - obproxy_cannot_connected
    - ob_cluster_sync_delay_time_too_long
    - ob_host_data_disk_percent_over_threshold
    - ob_host_log_disk_percent_over_threshold
    - ob_host_install_disk_percent_over_threshold
    - ob_tenant_exists_expired_xa_trans
    - ob_cluster_active_session_count_over_threshold
    - ob_tenant_active_session_count_over_threshold
    - ob_host_active_session_count_over_threshold
    - ob_tenant_slow_sql_exists
    - ob_tenant_large_trans_exist
    - same_alarm_rule_detect_too_many_targets
    - ob_tenant_expired_trans_exist
    - ob_tenant_long_trans_exist
    - ob_tenant_task_timeout
    - ob_host_task_timeout
    - ob_tenant_log_disk_usage_high
    - ob_tenant_no_compaction
    - ob_tenant_no_frozen
    - ob_tenant_compaction_error
    - host_operation
    - obproxy_host_operation
    - obproxy_cluster_operation
    - ob_host_operation
    - refresh_location_cache_failed
    - ob_tenant_log_stream_degraded
    - arbitration_service_unavailable
    - observer_process_stop
    - obproxyd_process_stop
    - obproxy_process_stop
    - standby_tenant_sync_delay_too_long
    - standby_tenant_sync_status_error
    - obproxy_client_connections_usage_over_threshold
    - ob_tenant_request_queue_over_threshold
    - oas_anomaly_sql_from_anomaly_event_analysis_cpu_percent_high
    - oas_anomaly_sql_from_anomaly_event_analysis_perf_degradation
    - oas_anomaly_sql_from_anomaly_event_analysis_plan_changed
    - oas_anomaly_sql_from_sql_inspection_perf_degradation
    - oas_anomaly_sql_from_sql_inspection_plan_changed
    - os_observer_not_exist
    - refresh_location_cache_failed_by_metric
    - ob_tenant_cpu_usage_over_threshold
    - ob_tenant_partition_replica_absent
    - ob_tenant_partition_leader_absent
    - ob_tenant500_storage_short_meta_mem_hold_high
    - obproxy_core_dump
    - ob_server_cannot_connect_arbitration
    - agent_process_count_abnormal
  - Application alerts
    - ob_cluster_inspection_not_passed
    - ob_host_ssd_wear_indicator_over_threshold
    - ob_host_mem_percent_over_threshold
    - ob_host_net_recv_percent_over_threshold
    - ob_host_net_send_percent_over_threshold
    - ob_host_tcp_retrans_percent_over_threshold
    - ob_host_cpu_percent_over_threshold
    - inc_backup_delay
    - base_backup_fail
    - base_backup_too_long_time_no_one_success_task
    - backup_process_dead
    - backup_storage_capacity_over_threshold
    - backup_storage_capacity_retry_times_exceeded
    - backup_storage_capacity_timeout_or_interrupted
    - ocp_remote_server_time_diff_too_large
    - monitor_exporter_unavailable
    - system_obproxy_unavailable
    - host_unavailable
    - host_ntp_offset_too_large
    - host_ntp_service_not_exist
    - host_agent_res_memory_over_threshold
    - host_agent_open_fd_count_over_threshold
    - host_agent_goroutine_count_over_threshold
    - partition_create_failed
    - obagent_dead
    - host_disk_readonly
    - ic_server_connect_failed Inter-Connector
    - vpc_connect_failed
    - node_load1_peak
    - Host log alerts
    - base_backup_timeout
    - base_secondary_backup_fail
    - ocp_meta_db_disconnected
    - ocp_http_request_timeout
    - ocp_http_request_too_many_errors_occur
    - ocp_alarm_detect_timeout
    - odp_instance_compress_failed
    - odp_instance_expanse_failed
    - odp_sql_execute_failed
    - odp_sql_query_slow
    - agentd_process_stop
    - mgragent_process_stop
    - monagent_process_stop
    - ocp_contingency_failed
    - ob_host_invalid_disk_exists
    - ob_cluster_recyclebin_disk_used_over_threshold
    - ob_host_monitordb_disconnected
    - upgrade_ocp_agent_failed
    - host_agent_version_not_same
    - ocp_collect_metric_failure_rate_high
  - OAS alerts
    - os_cpu_irq_error
    - os_tsar_cpu_sys_abnormal
    - os_observer_fd_usage
    - os_tsar_cpu_util_full
    - os_tsar_cpu_util_hwm
    - os_kernel_io_hang
    - os_tsar_sda_ioawait
    - os_tsar_nvme_ioawait
    - os_tsar_traffic_drop
    - os_tsar_traffic_error
    - os_observer_core_dump
    - os_nic_1000m_full
    - os_nic_1000m_hwm
    - os_tsar_traffic_overload
    - node_file_root_usage
    - node_file_inode_usage
    - os_kernel_ntp_down
    - os_kernel_ntp_delay
    - node_memory_peak
    - os_home_file_usage
    - node_file_data1_usage
    - node_file_datalog1_usage
    - sql_audit_collect_lost_percent_over_threshold
  - Appendix
    - Exception handling for OceanBase cluster compaction
    - Apply throttling to an OceanBase cluster
    - Network troubleshooting
    - Execute the alert clearance plan
- API Reference
  - Overview
  - API call description
  - Rules for generating a signature by using AK/SK
  - Task return structure
  - Cluster management
    - Query OceanBase clusters
    - Create an OceanBase cluster
    - Delete an OceanBase cluster
    - Stop an OceanBase cluster
    - Start an OceanBase cluster
    - Restart an OceanBase cluster
    - Upgrade an OceanBase cluster
    - # Move out an OceanBase cluster
    - # Perform a takeover precheck on an OceanBase cluster
    - # Take over an OceanBase cluster
    - Query zones of an OceanBase cluster
    - Create a zone for an OceanBase cluster
    - Delete a zone from an OceanBase cluster
    - Stop a zone in an OceanBase cluster
    - Start a zone in an OceanBase cluster
    - Restart a zone in an OceanBase cluster
    - Add an OBServer
    - Delete multiple OBServers at a time
    - Stop an OBServer
    - Start an OBServer
    - Restart an OBServer
    - Replace an OBServer
    - Change the password of an OceanBase cluster
    - Query the description information of the OceanBase cluster parameters
    - Query parameters of an OceanBase cluster
    - Modify parameters of an OceanBase cluster
    - Query the list of OBServers in an OceanBase cluster
    - Query the list of OBServers in a zone
    - Perform a switchover pre-check
    - Perform a failover pre-check
    - Perform a switchover
    - Perform a failover
    - Obtain resource statistics of an OceanBase cluster
    - Obtain resource statistics of all OBServer nodes in a cluster
    - Query the list of resource units in an OceanBase cluster
  - Tenant management
    - Query tenants of a cluster
    - Query all tenants
    - Query details about a tenant
    - Create a tenant
    - Create a standby tenant
    - Delete a tenant
    - Lock a tenant
    - Unlock a tenant
    - Query units of a tenant
    - Delete a unit from a tenant
    - Add a replica for a tenant
    - Delete a replica of a tenant
    - Modify a replica of a tenant
    - Modify zone priorities of a tenant
    - Change the administrator password of a tenant
    - Modify the whitelist of a tenant
    - Query parameters of a tenant
    - Modify parameters of a tenant
    - Obtain a list of unit specifications
    - Create a resource unit specification
    - Delete a resource unit specification
    - # Perform a switchover precheck
    - # Perform a switchover
    - # Perform a batch switchover precheck
    - # Perform a batch switchover
    - # Perform a failover precheck
    - # Perform a failover
    - # Perform a batch failover precheck
    - # Perform a batch failover
  - OBProxy management
    - Create an OBProxy cluster
    - Delete an OBProxy cluster
    - Query OBProxy clusters
    - Query details about an OBProxy cluster
    - Update configurations of an OBProxy cluster
    - Add an OBProxy
    - Take over an OBProxy
    - Delete an OBProxy
    - Restart an OBProxy
    - Upgrade an OBProxy
    - Add a connectable OceanBase cluster for an OBProxy cluster
    - Remove a connectable OceanBase cluster from an OBProxy cluster
    - Query the description information of the OBProxy parameters
    - Query parameters of an OBProxy cluster
  - Database management
    - Query databases
    - Create a database
    - Modify a database
    - Delete a database
    - Query the list of database users
    - Query database user details
    - Create a database user
    - Delete a database user
    - Change the password of a database user
    - Lock a database user
    - Unlock a database user
    - Query the list of database roles
    - Query database role details
    - Create a database role
    - Delete a database role
    - Query database objects
    - Grant global privileges to a user
    - Revoke global privileges of a user
    - Change global privileges of a user
    - Grant global privileges to a role
    - Revoke global privileges of a role
    - Change global privileges of a role
    - Grant roles to a user
    - Revoke roles of a user
    - Change roles of a user
    - Grant roles to a role
    - Revoke roles of a role
    - Change roles of a role
    - Grant database privileges to a user
    - Revoke database privileges of a user
    - Change database privileges of a user
    - Grant object privileges to a user
    - Revoke object privileges of a user
    - Change object privileges of a user
    - Grant object privileges to a role
    - Revoke object privileges of a role
    - Change object privileges of a role
  - Monitoring
    - Query the description information of monitoring metrics
    - Query monitoring data
    - Query monitoring data by tag
  - Alerts
    - Call an alert API
    - Alert events
      - Query the alert event list
      - Query alert events
    - Alert notifications
      - Query alert notifications
  - Inspection
    - Query all inspection tasks
    - Query inspection objects
    - View the details of an inspection report
    - Initiate an inspection
    - # Query the last inspection result of an inspection item
    - # Query the last inspection result of an inspection object
  - SQL performance
    - Query performance indicators of an SQL statement
    - Query the performance indicator trend of an SQL statement
    - Query SQL text
    - Query performance indicators of an execution plan
    - Query the performance indicator trend of an execution plan
    - Query the operator structure of an execution plan
    - Query the list of slow SQL statements
    - Query snapshots
    - Generate a performance report
    - Query a performance report
  - Backup and recovery
    - Query backup capabilities of a cluster
    - Create a backup strategy for a cluster
    - Modify the backup strategy of a cluster
    - Delete the backup strategy of a cluster
    - Query the backup strategy of a cluster
    - Query the backup overview of a cluster
    - Query data backup tasks of a cluster
    - Query log backup tasks of a cluster
    - Query recovery tasks of a cluster
    - Immediately back up a cluster
    - Parse cluster backup data
    - # Start backup scheduling for a cluster
    - # Stop backup scheduling for a cluster
    - Initiate tenant recovery
    - Preview a restore task
    - Add restore resources
    - Clear added restore resources
    - Initiate a data backup for a tenant
    - Create a backup strategy for a tenant
    - Delete the backup strategy of a tenant
    - View the data backup tasks of a tenant
    - View the log backup tasks of a tenant
    - View restore tasks
    - Parse the backup information of a tenant
    - Query the backup strategy of a tenant
    - # Modify the backup strategy of a tenant
    - # Start backup scheduling for a tenant
    - # Stop backup scheduling for a tenant
  - Host management
    - Query regions
    - Query details about a region
    - Add region information
    - Delete a region
    - Query IDCs
    - Query details about an IDC
    - Add IDC information
    - Delete an IDC
    - Query host types
    - Query details about a host type
    - Add host type information
    - Delete a host type
    - Query hosts
    - Query details about a host
    - Add multiple hosts at a time
    - Delete a host
    - Delete multiple hosts at a time
  - Software packages
    - Query software packages
    - Upload a software package
    - Delete a software package
  - O&M tasks management
    - Query tasks
    - Query details about a task
    - Retry a task
    - Roll back a task
    - Query subtask logs
    - Retry a subtask
    - Skip a subtask
    - Cancel a subtask
  - System management
    - Health examination
      - Query the basic information of an OCP application
      - Query OCP server time
      - Query OCP application status
    - Operation Audit
      - Query event history
    - Agent management
      - Query OCP Agent details on a host
      - Stop the OCP Agent process on a host
      - Batch stop the OCP Agent processes on hosts
      - Restart the OCP Agent process on a host
      - Batch restart the OCP Agent processes on hosts
      - Query OCP Agent processes on a host
      - Restart the OCP Agent process on a host
      - Stop the OCP Agent process on a host
- Metric reference
  - Overview of metrics
  - Monitoring metrics list
  - OceanBase cluster
    - QPS
    - Query response time
    - TPS
    - Transaction response time
    - Request queue time
    - Number of sessions
    - TPS
    - Number of transaction logs
    - Transaction log volume
    - Time consumed by transaction logs
    - IOPS
    - IO time-consuming
    - I/O Throughput
    - Process memory
    - Process CPU utilization
    - Process file descriptors
    - Number of process threads
    - sys500 memory occupation
    - Error logs
  - OceanBase Database tenant
    - QPS
    - Response time (SQL mode)
    - Sessions
    - SQL execution plan category
    - SQL execution plan time
    - Wait events
    - Metrics related to time consumption of wait events
    - Request waiting queue
    - Request waiting queue time consuming
    - Request queue size
    - Tenant CPU cost
    - Tenant thread usage
    - memroy usage pecent
    - MemStore usage
    - Rpc package rt
    - RPC packet throughput
    - Cursors
    - Clog synchronization delay
    - DB time metrics
    - Metrics for the SQL execution phase
    - Frontend workload metrics
    - Background workload metrics
    - PX worker thread usage
    - TPS
    - Transaction response time
    - Transaction response time details
    - Number of transaction logs
    - Transaction log volume
    - Time consumed by transaction logs
    - Lock waits
    - Time consumed by lock waits
    - TPS
    - Partitions
    - Number of XA transactions
    - Number of XA statements
    - Transaction table read request hits
    - Average execution duration of XA statements
    - MemStore
    - IOPS
    - IO time-consuming
    - I/O Throughput
    - Cache size
    - Cache hit rates
    - Number of cache requests
    - Frozen MemStores
    - # Log disk
    - # Data disk
    - Objects
    - # QPS (OBKV-Table)
    - # Response time (OBKV-Table)
    - # Average number of statement lines processed (OBKV-Table)
    - # QPS (OBKV_Hbase)
    - # Response time (OBKV-HBase)
    - # Average number of statement lines processed (OBKV-HBase)
  - Binlog Service
    - Sending Delay
    - Associate RPS
    - Network Traffic
    - Binlog Delay
    - Binlog RPS
    - CPU
    - memory used
    - memory
    - disk used
    - Binlog Disk Write Rate
    - disk ratio
    - FD count
    - network bytes
  - OBProxy cluster
    - TPS
    - QPS
    - Client connections
    - Server connections
    - Average response time for each SQL statement
    - Memory for the obproxy process
    - OBProxy CPU usage
    - Number of file descriptors for the obproxy process
    - Number of threads in the obproxy process
    - Log error
    - Route table queries
    - Net bytes
  - Host
    - Linux system load
    - CPU Utilization
    - I/O usage
    - I/O queue length
    - IOPS
    - Time consumed by I/O operations
    - I/O throughput
    - Network throughput
    - TCP retransmission rate
    - Packet forwarding
    - NTP clock offset
    - Inode usage
    - Memory
    - Memory usage
    - Disk
    - Process resident memory
    - Process CPU utilization
    - Number of process file descriptors
    - Number of process threads
    - Number of OCP-Agent process goroutines
- Information Collection Reference
  - Major Compaction Exceptions
    - # Collect information about the major compaction status of zones of a cluster
    - # Collect information about the ongoing major compaction in a cluster
    - # Collect suggestions provided based on historical major compactions
    - # Collect diagnostic information about major compactions
    - # Collect information about DAG warnings in OceanBase Database
    - # Collect RootService task records
    - # Collect the last-one-day records of major compaction events scheduled by RootService
    - # Collect the checksum information about tablets
    - # Collect the checksum information about columns
    - # Collect major compaction parameter settings
    - # Collect the major compaction time
  - OCP Agent Exceptions
    - # Collect panic logs of the mgragent process
    - # Collect panic logs of the monagent process
    - # Collect information about goroutines of the agent processes
  - Cluster Exceptions
    - # Collect information about bad disks
    - # Collect information about OBServer nodes in a cluster
    - # Collect obstack information on a cluster node
    - Collect information about the core dump file of the observer process
    - Collect host logs containing the CRASH ERROR keyword
    - Collect connectivity information of the sys tenant
  - CPU Exceptions
    - # Collect information about processes with high CPU utilization on a cluster node
    - # Collect information about threads with high CPU utilization in an observer process
  - Data Disk Full
    - # Collect the data disk usage information of nodes in a cluster
    - # Collect incremental data generated during cluster compactions
    - # Collect information about the disk space occupied by temporary files of a tenant
    - # Collect information about sizes of data of different versions in major SSTables
    - # Collect information about the macroblock utilization of nodes
  - Memory Exceptions
    - Collect information about modules with highest memory usage
    - Collect memory allocation sampling data of OBServer nodes
    - Collect KV cache information of a tenant
    - Collect memory leakage detection information
    - Collect MemStore information of a tenant
  - Host Exceptions
    - Collect logs from the /var/log/messages directory of a host
    - Collect host information by running the df -h command
  - Other Tenants Exceptions
    - Collect host logs containing the dump tenant info keyword
    - Collect host logs containing the dump tenant disk usage keyword
    - Collect host logs containing the dump tenant info keyword
- Error codes reference
  - OCP error codes
  - OBServer error codes
    - MySQL mode
      - Overview
      - 0001 to 3999
      - 4000 to 4499
      - 4500 to 4999
      - 5000 to 5999
      - 6000 to 6999
      - 7000 to 7999
      - 8000 to 8999
      - 9000 to 9499
      - 9500 to 9999
      - 10000 to 12000
      - 22998, 30926, 38104, and 38105
    - Oracle mode
      - Overview
      - ORA-00000 to ORA-00999
      - ORA-01000 to ORA-01499
      - ORA-01500 to ORA-01999
      - ORA-02000 to ORA-04999
      - ORA-05000 to ORA-10000
      - ORA-10000 to ORA-19999
      - ORA-20000 to ORA-29999
      - ORA-30000 to ORA-49999
      - ORA-50000 to ORA-99999
      - PLS-00000 to PLS-00999
FAQ
- FAQ about deployment
- FAQ on upgrade
- FAQ on O&M
  - FAQ on accounts and passwords
  - FAQ on host management
  - FAQ on OceanBase cluster
  - FAQ on OceanBase tenants
  - FAQ on OBProxy
  - FAQ on the OCP software package
  - FAQ on backup and recovery
- FAQ on monitoring
  - FAQ on monitoring metrics
  - FAQ on SQL monitoring
  - FAQ about resource usage
  - Use OCP-Agent to pull time-series monitoring data
- FAQ on alerts
- FAQ on the OCP system
- OCP multi-cluster FAQ
Appendix
- OCP background tasks
- Tables managed by the daemon
- Component listening port list
- Processes
- Install and configure OCI
- AWS S3 protocol
Release Notes
- V4.3
  - OCP V4.3.3
  - OCP V4.3.2
  - OCP V4.3.1
  - OCP V4.3.0