#parallel_setup_cost = 1000.0 # 设置计划员对启动并行工作进程的成本的估计 #parallel_tuple_cost = 0.1 # 设置计划员对将一个元组从一个并行工作进程转移到另一个进程的成本的估计值 #min_parallel_table_scan_size = 8MB 设置必须扫描的最小表数据量,以便考虑并行扫描 #min_parallel_index_scan_size = ...
00:00:00 postgres: logical replication launcher 通过以上输出,可以看出 PostgreSQL 安装在“/usr/pgsql-12”目录中,初始化数据库的数据目录为“/var/lib/pgsql/12/data”。同时,操作系统创建了一个新的用户“postgres”。 除此之外,还可以安装一些第三方的扩展包和管理工具: yum install postgresql12-contrib ...
With this setup, any data changes in the employees table in source_db will automatically replicate to the employees table in target_db. Key Considerations and Explanation: Selective Data Replication:Logical replication allows specific tables or rows to be replicated, useful for cases where full repli...
This can lead to latency in your replication setup, because you have to wait until the 16 MB have been created by the master database instance. In many cases, this kind of delay might not be acceptable. 丢失最后一个 XLOG 文件,该文件尚未最终确定(因此未发送到存档并因崩溃而丢失),这通常是...
postgres=#selectpg_replication_origin_session_setup('test_origin'); -- 将当前会话标记为从给定的原点回放,从而允许跟踪回放进度。 只能在当前没有选择原点时使用。使用pg_replication_origin_session_reset 命令来撤销。 pg_replication_origin_session_setup---(1row) postgres=#insertintot1values(100);selectpg...
WalSndLoop(send_data = 0x891d26 <XLogSendLogical>) C++ (gdb) ## 一直等待,直到有wal后调用send_data函数指针指向的XLogSendLogical函数开始写逻辑解码数据 StartLogicalReplication(cmd = 0x18c1b58) C++ (gdb) exec_replication_command(cmd_string = 0x1812418 "START_REPLICATION SLOT \"test_for_recvlog...
/usr/pgsql-12/bin/postgresql-12-setup initdb 初始化完成之后,会在/var/lib/pgsql/12/data 生成pgsql主的配置文件 postgresql.conf,修改主的配置文件 vim postgresql.conf 允许来自任何主机的连接 listen_addresses = '*' 最大连接数,从库的max_connections必须要大于主库的 ...
2. Logical Replication: Allows more granular control over replication, enabling selective data synchronization at a table or row level rather than the entire database. Useful for data migrations or multi-master replication setups. 3. Physical Replication: ...
postgresql repmgr setup 一.soft requires(Master/Slave) OS: CentOS Linux release 7.3.1611 (Core) X64 1.disabled SELINUX # more /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values:...
rhel8.x86_64 -- 环境变量 echo "export PATH=/usr/pgsql-16/bin:$PATH" >> /etc/profile -- 初始化 /usr/pgsql-16/bin/postgresql-16-setup initdb systemctl enable postgresql-16 systemctl start postgresql-16 systemctl status postgresql-16 -- 本地登陆 su - postgres psql -- 安装插件 create...