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Client connections

Last Updated：2023-08-15 11:20:59 Updated

This topic describes the monitoring metric client connections in an OBProxy cluster.

Client connections

Definition

The number of connections established between an OBProxy cluster and the client at the current point in time.

Description

Metric	Metric field name	Unit
-	current_session_client	count

Calculation expression

sum(odp_current_session{sessionType="client",@LABELS}) by (@GBLABELS)

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OceanBase Cloud Platform

V3.3.1Enterprise Edition

Document Overview
Product Introduction
- What is OceanBase Cloud Platform?
- System architecture
- Features
- Limits
  - System requirements
  - Dependencies
Deployment Guide
- Product Introduction
  - What is OceanBase Cloud Platform?
  - System architecture
- Deployment
  - Overview
  - Deploy OCP on a single node
  - Deploy OCP clusters in the multi-cluster mode
- Plan resources
  - OCP-Server specifications
  - MetaDB resources
  - MonitorDB resources
  - Host resources
- Prepare the deployment environment
  - Standardize a host
  - Check the environment
- Deploy OCP on a single node
  - Prepare installation media
  - Generate a configuration file
  - Multi-zone deployment
  - Deploy 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
Quick Start
- OCP operations
- Upload a software package
- Add a host
- Create a cluster
- Create a tenant
- Create a user
- Create an OBProxy cluster
User Guide
- OCP overview
- Log on to the OceanBase Cloud Platform console
- Features
  - Clusters
    - Cluster management
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    - Overview of the cluster details page
  - Tenants
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  - Manage tenant parameter templates
- Manage hosts
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  - Add a host
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- Manage software packages
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- Manage OBProxies
  - Create an OBProxy cluster
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  - Upgrade an OBProxy
  - Add an OBProxy
  - Refresh OBProxy configurations
  - Monitor OBProxy cluster performance
  - OBProxy cluster parameter management
  - Add a connectable OceanBase cluster
  - Delete an OBProxy cluster
  - Upgrade all OBProxies in an OBProxy cluster
  - Restart all OBProxies in an OBProxy cluster
  - Delete a connected OceanBase cluster
- Use backup and recovery
  - Backup and recovery management operations
  - Backup and recovery guide
  - Create a backup strategy
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  - Install a service
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- Manage alerts
  - Alert-related concepts
  - Create an alert item
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  - Alert groups
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  - Create a blocking condition
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  - Add a filtering keyword
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- Use system management
  - Role overview
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  - Use the inspection feature
    - Initiate an inspection
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    - View inspection rules
- Manage OCP clusters in the multi-cluster mode
  - Register an OCP cluster
  - Leader \& Follower Details
  - Manage OCP cluster parameters
  - Switch an OCP cluster in daily maintenance
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  - Delete a faulty follower OCP cluster
  - Unbind a leader and a follower OCP cluster
- Manage OCP in multi-zone mode
  - View details of multiple zones
  - Manage parameters in multi-zone mode
- Appendix
  - OCP configuration parameters
  - SQL performance module
  - OCP resource unit specifications
  - OCP error table
  - OCP alert template variables
  - Call an alert API
  - OCP background tasks
  - Monitoring metrics
  - Examples of alert channel configuration
  - OBProxy startup parameters
  - System privileges in a MySQL tenant
  - Component listening port list
  - OCP-Agent processes
  - Enable the OCP multi-cluster mode
  - PAM permission denied
  - Failed to upload the software package
  - Check the sudo permissions of a user
  - Default OCP roles
  - FAQ about multi-zone mode
  - FAQ about OBProxy takeover
  - Diagnose XA transactions and suspended transactions
Metric reference
- Overview of metrics
- 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
  - Time consumed by I/O operations
  - I/O throughput
- OceanBase Database tenant
  - QPS
  - Response time
  - Sessions
  - SQL execution plan types
  - Wait events
  - Time consumed by waiting events
  - Request queue
  - Request queue time
  - CPU utilization
  - MemStore usage
  - Time consumed by RPC packets
  - RPC packet throughput
  - opened_cursors
  - Clog synchronization delay
  - TPS
  - Transaction response time
  - Number of transaction logs
  - Transaction log volume
  - Time consumed by transaction logs
  - Lock waits
  - Time consumed by lock waits
  - TPS
  - MemStore
  - IOPS
  - Time consumed by I/O operations
  - I/O throughput
  - Cache size
  - Cache hit rates
  - Number of cache requests
- OBProxy cluster
  - TPS
  - Requests per second
  - Client connections
  - Server connections
  - Average response time for each SQL statement
  - Average error packets per second
  - Average route table queries per second
  - Average bytes in a network request or response
- Host
  - Linux system load
  - CPU utilization
  - IOPS
  - Time consumed by I/O operations
  - I/O throughput
  - Network throughput
  - Memory
  - Disk
Troubleshooting
- Failed to register a follower OCP cluster
- Failed to add credentials to the password box
- Restricted OCP logon
- Failed to view logs in OCP
- Failed to upload the software package
- Do IO Bench error
- Check the sudo permissions of a user
- PAM permission denied
- Resolve the problem of no sudo permissions when adding a host
- Questions about OCP-Agent
  - Exceptions of the ocp_agent processes
  - System resource constraints and PAM
- Appendix
  - Processes
  - OCP-Agent O\&M script
Alert Reference
- Alert Reference
- 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
  - ob_log_alarm
  - 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
  - ob_zone_sstable_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_full_clog_sync_delay
  - ob_tenant_readonly_clog_sync_delay
  - ob_tenant_logonly_clog_sync_delay
  - ob_tenant_slow_sql_exists
  - ob_tenant_large_trans_exist
  - same_alarm_rule_detect_too_many_targets
  - ob_tenant_task_timeout
  - ob_tenant_memtable_release_timeout
- 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
  - no_enough_exporter
  - 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_unavaliable
  - 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
  - vpc_connect_failed
- Appendix
  - Set an alert-blocking condition
  - Modify alert thresholds
  - Exception handling for OceanBase cluster compaction
  - OCP-Agent script
  - Apply throttling to an OceanBase cluster
  - Network troubleshooting
  - Tables managed by the daemon
  - Examples of alert channel configuration
API Reference
- Overview
- API call description
- Cluster information
  - Query 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
  - 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 parameter metadata of an OceanBase cluster
  - Query parameters of an OceanBase cluster
  - Modify parameters of an OceanBase cluster
  - Query servers
  - Query servers in a zone
- Tenant information
  - Query tenants of a cluster
  - Query all tenants
  - Query details about a tenant
  - Create a 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
  - OceanBase database management
    - Query databases
    - Create a database
    - Modify a database
    - Delete a database
- Hosts
  - Query regions
  - Query details about a region
  - Add a region
  - Delete a region
  - Query IDCs
  - Query details about an IDC
  - Add an IDC
  - Delete an IDC
  - Query host types
  - Query details about a host type
  - Add a host type
  - 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
- 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 parameter metadata of an OBProxy
  - Query parameters of an OBProxy cluster
- Monitoring
  - Query the metadata of a monitoring metric
  - Query monitoring data
  - Query monitoring data and attach a tag to the data
- Alerts
  - Alert events
    - Query the alert event list
    - Query alert events
  - Alert notifications
    - Query alert notifications
- Task management
  - Query tasks
  - Query details about a task
  - Retry a task
  - Roll back a task
  - Query logs of a subtask instance
  - Retry a subtask
  - Skip a subtask
  - Cancel a subtask
- OCP event history
  - Query event history
- OceanBase user and privilege management
  - Query database user details
  - 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 database role details
  - 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
- OCP Agent management
  - Query OCP Agent details on a host
  - Stop basic OCP Agent processes on a host
  - Batch stop basic OCP Agent processes on a host
  - Restart basic OCP Agent processes on a host
  - Batch restart basic OCP Agent processes on a host
  - Query OCP Agent processes on a host
  - Restart OCP Agent processes on a host
  - Stop OCP Agent processes on a host
- 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
- 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
  - Initiate tenant recovery
- Others
  - Query the basic information of an OCP application
  - Query OCP server time
  - Query OCP application status
- Appendix
  - Task information
  - View alerts through APIs
FAQ
- FAQ on deployment
- FAQ on upgrade
- FAQ on monitoring
  - FAQ on monitoring metrics
  - FAQ on SQL monitoring
  - FAQ about resource usage
- FAQ on alerts
- FAQ on O&M
  - FAQ on accounts and passwords
  - FAQ on host management
  - FAQ on OceanBase clusters
  - FAQ on OceanBase tenants
  - FAQ on OBProxy
  - FAQ on the OCP software package
  - FAQ on backup and recovery
- FAQ on the OCP system
- OCP multi-cluster FAQ