v2.1
- 关于MogDB
- 快速入门
- MogDB实训平台
- 容器化安装
- 单节点安装
- 访问数据库
- 使用命令行访问MogDB
- 使用图形工具访问MogDB
- 使用中间件访问MogDB
- 使用编程语言访问MogDB
- 使用样本数据集Mogila
- 特性描述
- 高性能
- 高可用
- 维护性
- 数据库安全
- 企业级特性
- 应用开发接口
- AI能力
- 安装指南
- 管理指南
- AI特性指南
- 概述
- Predictor:AI查询时间预测
- X-Tuner:参数调优与诊断
- SQLdiag:慢SQL发现
- Anomaly-detection:数据库指标采集、预测与异常监控
- Index-advisor:索引推荐
- DeepSQL:库内AI算法
- DB4AI:数据库原生AI引擎
- 安全指南
- 开发者指南
- 应用程序开发教程
- 开发规范
- 基于JDBC开发
- 概述
- JDBC包、驱动类和环境类
- 开发流程
- 加载驱动
- 连接数据库
- 连接数据库(以SSL方式)
- 执行SQL语句
- 处理结果集
- 关闭连接
- 日志管理
- 示例:常用操作
- 示例:重新执行应用SQL
- 示例:通过本地文件导入导出数据
- 示例:从MY向MogDB进行数据迁移
- 示例:逻辑复制代码示例
- 示例:不同场景下连接数据库参数配置
- JDBC接口参考
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- 基于ODBC开发
- 基于libpq开发
- 基于Psycopg开发
- 调试
- 附录
- 存储过程
- 用户自定义函数
- PL/pgSQL-SQL过程语言
- 定时任务
- 自治事务
- 逻辑复制
- Foreign Data Wrapper
- 物化视图
- 资源负载管理
- 应用程序开发教程
- 性能优化指南
- 参考指南
- 系统表及系统视图
- 系统表和系统视图概述
- 系统表
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CHAIN
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_OPT_MODEL
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_TXN_SNAPSHOT
- GS_WLM_INSTANCE_HISTORY
- GS_WLM_OPERATOR_INFO
- GS_WLM_PLAN_ENCODING_TABLE
- GS_WLM_PLAN_OPERATOR_INFO
- GS_WLM_EC_OPERATOR_INFO
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTHID
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_EXTENSION_DATA_SOURCE
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_FOREIGN_TABLE
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_RANGE
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PG_WORKLOAD_GROUP
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- 系统视图
- GET_GLOBAL_PREPARED_XACTS(废弃)
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_INSTANCE_TIME
- GS_LABELS
- GS_MASKING
- GS_MATVIEWS
- GS_SESSION_MEMORY
- GS_SESSION_CPU_STATISTICS
- GS_SESSION_MEMORY_CONTEXT
- GS_SESSION_MEMORY_DETAIL
- GS_SESSION_MEMORY_STATISTICS
- GS_SQL_COUNT
- GS_WLM_CGROUP_INFO
- GS_WLM_PLAN_OPERATOR_HISTORY
- GS_WLM_REBUILD_USER_RESOURCE_POOL
- GS_WLM_RESOURCE_POOL
- GS_WLM_USER_INFO
- GS_STAT_SESSION_CU
- GS_TOTAL_MEMORY_DETAIL
- MPP_TABLES
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_INVALID_BACKENDS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_GTT_RELSTATS
- PG_GTT_STATS
- PG_GTT_ATTACHED_PIDS
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_SECLABELS
- PG_SETTINGS
- PG_SHADOW
- PG_STATS
- PG_STAT_ACTIVITY
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_REPLICATION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_TABLES
- PG_TDE_INFO
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VARIABLE_INFO
- PG_VIEWS
- PLAN_TABLE
- GS_FILE_STAT
- GS_OS_RUN_INFO
- GS_REDO_STAT
- GS_SESSION_STAT
- GS_SESSION_TIME
- GS_THREAD_MEMORY_CONTEXT
- 系统函数
- 支持的数据类型
- SQL语法
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER DATABASE
- ALTER DATA SOURCE
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER EXTENSION
- ALTER FOREIGN TABLE
- ALTER FUNCTION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER LARGE OBJECT
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER OPERATOR
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER RULE
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER SYSTEM SET
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLE SUBPARTITION
- ALTER TABLESPACE
- ALTER TEXT SEARCH CONFIGURATION
- ALTER TEXT SEARCH DICTIONARY
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER USER MAPPING
- ALTER VIEW
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- CONNECT BY
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE CAST
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE DATABASE
- CREATE DATA SOURCE
- CREATE DIRECTORY
- CREATE EXTENSION
- CREATE FOREIGN TABLE
- CREATE FUNCTION
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE OPERATOR
- CREATE PACKAGE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE RULE
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLE SUBPARTITION
- CREATE TABLESPACE
- CREATE TEXT SEARCH CONFIGURATION
- CREATE TEXT SEARCH DICTIONARY
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE USER MAPPING
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CAST
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATA SOURCE
- DROP DIRECTORY
- DROP EXTENSION
- DROP FOREIGN TABLE
- DROP FUNCTION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP OPERATOR
- DROP OWNED
- DROP PACKAGE
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROW LEVEL SECURITY POLICY
- DROP ROLE
- DROP RULE
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TEXT SEARCH CONFIGURATION
- DROP TEXT SEARCH DICTIONARY
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP USER MAPPING
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXECUTE DIRECT
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- INSERT
- LOCK
- MOVE
- MERGE INTO
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- PURGE
- REASSIGN OWNED
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- REINDEX
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHUTDOWN
- SNAPSHOT
- START TRANSACTION
- TIMECAPSULE TABLE
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- SQL参考
- GUC参数说明
- Schema
- Information Schema
- DBE_PERF
- 概述
- OS
- Instance
- Memory
- File
- Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
- Session/Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- SESSION_CPU_RUNTIME
- SESSION_MEMORY_RUNTIME
- STATEMENT_IOSTAT_COMPLEX_RUNTIME
- LOCAL_ACTIVE_SESSION
- Transaction
- Query
- STATEMENT
- SUMMARY_STATEMENT
- STATEMENT_COUNT
- GLOBAL_STATEMENT_COUNT
- SUMMARY_STATEMENT_COUNT
- GLOBAL_STATEMENT_COMPLEX_HISTORY
- GLOBAL_STATEMENT_COMPLEX_HISTORY_TABLE
- GLOBAL_STATEMENT_COMPLEX_RUNTIME
- STATEMENT_RESPONSETIME_PERCENTILE
- STATEMENT_USER_COMPLEX_HISTORY
- STATEMENT_COMPLEX_RUNTIME
- STATEMENT_COMPLEX_HISTORY_TABLE
- STATEMENT_COMPLEX_HISTORY
- STATEMENT_WLMSTAT_COMPLEX_RUNTIME
- STATEMENT_HISTORY
- Cache/IO
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
- GLOBAL_STAT_DB_CU
- GLOBAL_STAT_SESSION_CU
- Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_GET_BGWRITER_STATUS
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- Lock
- Wait Events
- Configuration
- Operator
- Workload Manager
- Global Plancache
- RTO
- 附录
- DBE_PLDEBUGGER Schema
- DBE_PLDEBUGGER Schema概述
- DBE_PLDEBUGGER.turn_on
- DBE_PLDEBUGGER.turn_off
- DBE_PLDEBUGGER.local_debug_server_info
- DBE_PLDEBUGGER.attach
- DBE_PLDEBUGGER.next
- DBE_PLDEBUGGER.continue
- DBE_PLDEBUGGER.abort
- DBE_PLDEBUGGER.print_var
- DBE_PLDEBUGGER.info_code
- DBE_PLDEBUGGER.step
- DBE_PLDEBUGGER.add_breakpoint
- DBE_PLDEBUGGER.delete_breakpoint
- DBE_PLDEBUGGER.info_breakpoints
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.finish
- DBE_PLDEBUGGER.set_var
- DB4AI Schema
- 工具参考
- 工具一览表
- 客户端工具
- 服务端工具
- 系统内部使用的工具
- mogdb
- gs_backup
- gs_basebackup
- gs_ctl
- gs_initdb
- gs_install
- gs_install_plugin
- gs_install_plugin_local
- gs_preinstall
- gs_sshexkey
- gs_tar
- gs_uninstall
- gs_upgradectl
- gs_expansion
- gs_dropnode
- gs_probackup
- gstrace
- kdb5_util
- kadmin.local
- kinit
- klist
- krb5kdc
- kdestroy
- pg_config
- pg_controldata
- pg_recvlogical
- pg_resetxlog
- pg_archivecleanup
- pssh
- pscp
- transfer.py
- FAQ
- gs_collector工具支持收集的系统表和视图列表
- 插件
- 数据库报错信息
- SQL标准错误码说明
- 第三方库错误码说明
- GAUSS-00001 - GAUSS-00100
- GAUSS-00101 - GAUSS-00200
- GAUSS 00201 - GAUSS 00300
- GAUSS 00301 - GAUSS 00400
- GAUSS 00401 - GAUSS 00500
- GAUSS 00501 - GAUSS 00600
- GAUSS 00601 - GAUSS 00700
- GAUSS 00701 - GAUSS 00800
- GAUSS 00801 - GAUSS 00900
- GAUSS 00901 - GAUSS 01000
- GAUSS 01001 - GAUSS 01100
- GAUSS 01101 - GAUSS 01200
- GAUSS 01201 - GAUSS 01300
- GAUSS 01301 - GAUSS 01400
- GAUSS 01401 - GAUSS 01500
- GAUSS 01501 - GAUSS 01600
- GAUSS 01601 - GAUSS 01700
- GAUSS 01701 - GAUSS 01800
- GAUSS 01801 - GAUSS 01900
- GAUSS 01901 - GAUSS 02000
- GAUSS 02001 - GAUSS 02100
- GAUSS 02101 - GAUSS 02200
- GAUSS 02201 - GAUSS 02300
- GAUSS 02301 - GAUSS 02400
- GAUSS 02401 - GAUSS 02500
- GAUSS 02501 - GAUSS 02600
- GAUSS 02601 - GAUSS 02700
- GAUSS 02701 - GAUSS 02800
- GAUSS 02801 - GAUSS 02900
- GAUSS 02901 - GAUSS 03000
- GAUSS 03001 - GAUSS 03100
- GAUSS 03101 - GAUSS 03200
- GAUSS 03201 - GAUSS 03300
- GAUSS 03301 - GAUSS 03400
- GAUSS 03401 - GAUSS 03500
- GAUSS 03501 - GAUSS 03600
- GAUSS 03601 - GAUSS 03700
- GAUSS 03701 - GAUSS 03800
- GAUSS 03801 - GAUSS 03900
- GAUSS 03901 - GAUSS 04000
- GAUSS 04001 - GAUSS 04100
- GAUSS 04101 - GAUSS 04200
- GAUSS 04201 - GAUSS 04300
- GAUSS 04301 - GAUSS 04400
- GAUSS 04401 - GAUSS 04500
- GAUSS 04501 - GAUSS 04600
- GAUSS 04601 - GAUSS 04700
- GAUSS 04701 - GAUSS 04800
- GAUSS 04801 - GAUSS 04900
- GAUSS 04901 - GAUSS 05000
- GAUSS 05001 - GAUSS 05100
- GAUSS 05101 - GAUSS 05200
- GAUSS 05201 - GAUSS 05300
- GAUSS 05301 - GAUSS 05400
- GAUSS 05401 - GAUSS 05500
- GAUSS 05501 - GAUSS 05600
- GAUSS 05601 - GAUSS 05700
- GAUSS 05701 - GAUSS 05800
- GAUSS 05801 - GAUSS 05900
- GAUSS 05901 - GAUSS 06000
- GAUSS 06001 - GAUSS 06100
- GAUSS 06101 - GAUSS 06200
- GAUSS 06201 - GAUSS 06300
- GAUSS 06301 - GAUSS 06400
- GAUSS 06401 - GAUSS 06500
- GAUSS 06501 - GAUSS 06600
- GAUSS 06601 - GAUSS 06700
- GAUSS 06701 - GAUSS 06800
- GAUSS 06801 - GAUSS 06900
- GAUSS 06901 - GAUSS 07000
- GAUSS 07001 - GAUSS 07100
- GAUSS 07101 - GAUSS 07200
- GAUSS 07201 - GAUSS 07300
- GAUSS 07301 - GAUSS 07400
- GAUSS 07401 - GAUSS 07480
- GAUSS 50000 - GAUSS 50999
- GAUSS 51000 - GAUSS 51999
- GAUSS 52000 - GAUSS 52999
- GAUSS 53000 - GAUSS 53699
- 错误日志信息参考
- 系统表及系统视图
- 故障诊断指南
- 常见故障定位手段
- 常见故障定位案例
- core问题定位
- 权限/会话/数据类型问题定位
- 服务/高可用/并发问题定位
- 表/分区表问题定位
- 文件系统/磁盘/内存问题定位
- SQL问题定位
- 索引问题定位
- 源码解析
- 常见问题解答 (FAQs)
- 术语表
推荐参数设置及新建测试库
在安装完数据库之后,推荐执行以下shell脚本来进行初始化参数设置。
注意:
执行脚本前,请确保脚本中提到的所有相关文件目录已存在。如没有,需要执行
mkdir -p <文件目录>
命令提前创建。例如:执行
gs_guc set -I all -N all -c "archive_dest='/ogarchive'"
前,可先执行ls -l
查看是否存在该目录,若不存在,需执行mkdir -p ogarchive
创建此目录。
!/bin/bash
source ~/.bashrc
##连接访问相关参数
##listen_addresses : 数据库服务器监听本地的IP地址,* 监听所有IP,重启生效
##remote_read_mode : 开启远程读功能,non_authentication指不进行证书认证,重启生效
##password_encryption_type : 数据库密码加密类型,1指采用sha256和md5两种方式分别对密码加密
##password_reuse_time : 检查密码重用的天数,0表示不检查
##password_lock_time : 账号的锁定时间,0表示不锁定
##password_effect_time : 密码有效时间,0表示长期有效
##session_timeout : 不进行任何操作的会话断开时间,0表示永不断开
function SecureAccess(){
gs_guc set -I all -N all -c "listen_addresses = '*'"
gs_guc set -I all -N all -c "remote_read_mode=non_authentication"
gs_guc set -I all -N all -c "password_encryption_type=1"
gs_guc set -I all -N all -c "password_reuse_time=0"
gs_guc set -I all -N all -c "password_lock_time=0"
gs_guc set -I all -N all -c "password_effect_time=0"
gs_guc set -I all -N all -c "session_timeout=0"
}
##wal相关参数
##wal_level : 写入wal日志信息的详细程度,logical级别的wal信息支持逻辑解析,重启生效
##full_page_writes : 全量检查点情况下,第一次checkpoint后会将每个页面内容全部记录到wal日志,建议设置为off以及使用增量检查点及双写功能
##wal_log_hints : 同full_page_writes,包含提示位的非关键信息,重启生效
##xloginsert_locks : 并发写预写式日志锁的个数,提高写预写式日志的效率,重启生效
##advance_xlog_file_num : 提前初始化xlog文件的数目,在高并发情况下可减少创建xlog文件的性能影响,重启生效
function WAL(){
gs_guc set -I all -N all -c "wal_level=logical"
gs_guc set -I all -N all -c "full_page_writes=off"
gs_guc set -I all -N all -c "wal_log_hints=off"
gs_guc set -I all -N all -c "xloginsert_locks=48"
gs_guc set -I all -N all -c "advance_xlog_file_num=10"
}
##复制相关参数
##wal_keep_segments : wal文件保留数量,每个文件16MB,增大此值,在重做备库过程中可有效避免wal被移除的错误
##max_wal_senders : 上游节点sender线程的总数量,包括流复制和逻辑复制,重启生效
##most_available_sync : 最大可用模式,当同步备库故障后自动降级为异步,不阻塞主库数据变更,重启生效
##catchup2normal_wait_time : 异步备变同步备过程中,阻塞主库数据变更的时间,0表示不阻塞,重启生效
##enable_slot_log : 将主节点的复制槽信息同步到集群内其他节点,避免集群内各节点的slot不一致
##max_replication_slots : 最大复制槽的数量,包含物理复制槽和逻辑复制槽,重启生效
##wal_receiver_timeout : wal receiver线程超时时间,增加此值可减少由于网络抖动导致的复制关系重建次数
##sync_config_strategy : 该参数用以设置主备节点间数据库参数配置信息的同步方案,由于通常环境中备库服务器配置与主库并非1:1,因此如果同步参数配置,可能导致某些参数对于备库硬件资源而言过大,设置为none_node表示不同步,重启生效
function replicationAndSlots(){
gs_guc set -I all -N all -c "wal_keep_segments=1024"
gs_guc set -I all -N all -c "max_wal_senders=16"
gs_guc set -I all -N all -c "most_available_sync=on"
gs_guc set -I all -N all -c "catchup2normal_wait_time=0"
gs_guc set -I all -N all -c "enable_slot_log=on"
gs_guc set -I all -N all -c "max_replication_slots=32"
gs_guc set -I all -N all -c "wal_receiver_timeout=60s"
gs_guc set -I all -N all -c "sync_config_strategy=none_node"
}
##日志相关参数
##log_duration : 已完成SQL语句的执行时间是否要记录到日志中,需要结合log_statement使用
##log_line_prefix : 每条日志的前缀信息,时间戳、用户名、数据库名、客户端ip和端口、线程id、会话id
##log_checkpoints : 记录checkpoint信息到日志里
function dbLog(){
gs_guc set -I all -N all -c "log_duration=off"
gs_guc set -I all -N all -c "log_line_prefix='%m %u %d %r %p %S'"
gs_guc set -I all -N all -c "log_checkpoints=on"
}
##vacuum相关参数
##vacuum_cost_limit : vacuum线程开销限制,达到此值后开始休眠
##autovacuum_max_workers : autovacuum的最大并发数,每个worker都要消耗maintenance_work_mem大小的内存
##autovacuum_naptime : autovacuum的休眠时间,减少此值增加autovacuum的频率,统计信息更准确,但磁盘会更加繁忙
##autovacuum_vacuum_cost_delay : autovacuum的开销延迟,减少此值增加了autovacuum的频率
##autovacuum_io_limits : autovacuum线程每秒触发的io上限
##scale_factor 与 threshold 结合使用,触发条件一般是:表数据量 * scale_factor + threshold
##autovacuum_vacuum_scale_factor : 触发vacuum的缩放系统
##autovacuum_analyze_scale_factor : 触发analyze的缩放系数
##autovacuum_vacuum_threshold : 触发vacuum的阈值
##autovacuum_analyze_threshold : 触发analyze的阈值
function VACUUM(){
gs_guc set -I all -N all -c "vacuum_cost_limit=1000"
gs_guc set -I all -N all -c "autovacuum_max_workers=10"
gs_guc set -I all -N all -c "autovacuum_naptime=20s"
gs_guc set -I all -N all -c "autovacuum_vacuum_cost_delay=10"
gs_guc set -I all -N all -c "autovacuum_vacuum_scale_factor=0.05"
gs_guc set -I all -N all -c "autovacuum_analyze_scale_factor=0.02"
gs_guc set -I all -N all -c "autovacuum_vacuum_threshold=200"
gs_guc set -I all -N all -c "autovacuum_analyze_threshold=200"
gs_guc set -I all -N all -c "autovacuum_io_limits=104857600"
}
##性能统计相关参数
##instr_unique_sql_count : dbe_perf.statement表中的记录数
##enable_wdr_snapshot : 是否开启wdr快照功能,默认每小时执行一次,保留8天时间,类似oracle的AWR
##log_min_duration_statement : 慢sql阈值,执行时间超过这个值的sql会记录到statement_history表中
##track_activity_query_size : 当前执行query的文本字节数,重启生效
##enable_instr_rt_percentile : 是否开启计算系统中80%和95%的SQL响应时间的功能,off表示关闭sql响应时间信息计算功能
function perfStats(){
gs_guc set -I all -N all -c "instr_unique_sql_count=200000"
gs_guc set -I all -N all -c "enable_wdr_snapshot=on"
gs_guc set -I all -N all -c "log_min_duration_statement=200"
gs_guc set -I all -N all -c "track_activity_query_size=2048"
gs_guc set -I all -N all -c "enable_instr_rt_percentile=off"
}
##其他参数
##cstore_buffers : 列存共享缓存区大小,在不使用列存存储的场景可将此参数调到最低来节省内存开销,重启生效
##local_syscache_threshold : 每个会话的最大缓存大小,设置过高会引发动态内存不足,即数据库级别的OOM
##standby_shared_buffers_fraction : 备节点使用shared_buffer的比例
##checkpoint_segments : 触发全量checkpoint的wal数量,即使开启增量检查点,此参数依然有效
##checkpoint_completion_target : checkpoint间隔内完成全量checkpoint所需的时间
##max_files_per_process : 进程允许打开的最大文件数量
##behavior_compat_options : 数据库兼容性配置选项,参数值display_leading_zero会展示小数点前面的0
##lc_messages : 信息语言显示格式
##lc_monetary : 货币的显示格式
##lc_numeric : 数值的显示格式
##lc_time : 时间和时区的显示格式
function otherKeyParams(){
gs_guc set -I all -N all -c "cstore_buffers=16MB"
gs_guc set -I all -N all -c "local_syscache_threshold=32MB"
gs_guc set -I all -N all -c "standby_shared_buffers_fraction=1"
gs_guc set -I all -N all -c "checkpoint_segments=1024"
gs_guc set -I all -N all -c "checkpoint_completion_target=0.8"
gs_guc set -I all -N all -c "max_files_per_process=100000"
gs_guc set -I all -N all -c "behavior_compat_options='display_leading_zero'"
gs_guc set -I all -N all -c "lc_messages='en_US.UTF-8'"
gs_guc set -I all -N all -c "lc_monetary='en_US.UTF-8'"
gs_guc set -I all -N all -c "lc_numeric='en_US.UTF-8'"
gs_guc set -I all -N all -c "lc_time='en_US.UTF-8'"
}
##客户端白名单
##详细信息请参考pg_hba.conf文件
function setHba(){
gs_guc set -I all -N all -h "host all all 0.0.0.0/0 md5"
}
##max_process_memory : 整个实例允许使用的最大内存,由于要预留一部分内存给操作系统,所以这个参数需要根据RAM大小动态调整,调整规则:RAM * n% / 数据库实例数量,重启生效
##shared_buffers : 行存共享缓存区大小,建议设置为max_process_memory的40%,重启生效
##max_connections : 数据库实例允许的最大连接数,设置过高会引起动态内存不足的错误,需结合业务使用设定,重启生效
##work_mem : 工作内存一般指排序、hash或join占用的内存,对于复杂query,增大此内存可减少临时文件的使用
##maintenance_work_mem : 维护内存一般指vacuum或create index使用的内存,增加此参数可提高效率
##wal_buffers : wal缓存大小,调整此参数对数据库性能有一定影响
##max_prepared_transactions : 预编译事务的数量,建议与max_connections保持一致
## 判断RAM的大小,将数据库内存大小分4个阶梯,分别是4GB、8GB、64GB
## 当RAM小于等于4G,建议使用数据库默认参数
## 其他三个阶梯有相应的建议参数值
memory=`free -g|awk '{print $2}' |sed -n 2p`
if [[ $memory -le 4 ]]
then
echo "Defined values of specify parameters or use the default parameters"
else
if [[ $memory -gt 4 ]] && [[ $memory -le 8 ]]
then
gs_guc set -I all -N all -c "max_process_memory=$((memory*6/10))GB"
gs_guc set -I all -N all -c "shared_buffers=$((memory*2/10))GB"
gs_guc set -I all -N all -c "max_connections=500"
gs_guc set -I all -N all -c "work_mem=16MB"
gs_guc set -I all -N all -c "maintenance_work_mem=512MB"
gs_guc set -I all -N all -c "wal_buffers=128MB"
gs_guc set -I all -N all -c "max_prepared_transactions=500"
elif [[ $memory -gt 8 ]] && [[ $memory -le 64 ]]
then
gs_guc set -I all -N all -c "max_process_memory=$((memory*7/10))GB"
gs_guc set -I all -N all -c "shared_buffers=$((memory*2/10))GB"
gs_guc set -I all -N all -c "max_connections=1000"
gs_guc set -I all -N all -c "work_mem=32MB"
gs_guc set -I all -N all -c "maintenance_work_mem=1GB"
gs_guc set -I all -N all -c "wal_buffers=512MB"
gs_guc set -I all -N all -c "max_prepared_transactions=1000"
elif [[ $memory -gt 64 ]]
then
gs_guc set -I all -N all -c "max_process_memory=$((memory*8/10))GB"
gs_guc set -I all -N all -c "shared_buffers=$((memory*3/10))GB"
gs_guc set -I all -N all -c "max_connections=3000"
gs_guc set -I all -N all -c "work_mem=64MB"
gs_guc set -I all -N all -c "maintenance_work_mem=2GB"
gs_guc set -I all -N all -c "wal_buffers=1GB"
gs_guc set -I all -N all -c "max_prepared_transactions=3000"
else
echo "There may be a problem with the script, please contact us for support."
fi
WAL
replicationAndSlots
dbLog
VACUUM
perfStats
otherKeyParams
fi
SecureAccess
setHba
重启数据库,使参数生效
gs_om -t stop && gs_om -t start
在数据库init完成之后,如果需要进行测试,推荐新建数据库和新用户来进行测试。比如如果需要创建一个用于TPCC测试的数据库和用户,则执行以下命令。
CREATE DATABASE tpcc_db;
\c tpcc_db
CREATE USER tpcc_usr WITH PASSWORD "tpcc@1234";
alter user tpcc_usr sysadmin;
GRANT ALL ON schema public TO tpcc_usr;