在PG 12以前的版本,备库提升为主库需在备库主机上执行命令或者通过生成触发文件进行触发,在PG 12中,可通过客户端连接到数据库后执行pg_promote函数实现. 下面以一个简单的例子进行说明. 搭建流复制环境 参照PostgreSQL DBA(31) - Backup&Recovery#4(搭建流复制) ,注意在PG 12,recovery.conf文件已废弃,相关的配...
Add function pg_promote() to promote standbys to primaries (Laurenz Albe, Michaël Paquier) Previously, this operation was only possible by using pg_ctl or creating a trigger file. 1. 2. 3. 4. 2. 函数说明 AI检测代码解析 pg_promote(wait boolean DEFAULT true, wait_seconds integer DEFAULT...
pg_promote --- t (1 row) wait: 表示是否等待备库的 promotion 完成或者 wait_seconds 秒之后返回成功,默认值为 true。 wait_seconds: 等待时间,单位秒,默认 60 #也可通过su - postgres -c "pg_ctl promote"命令完成 日志信息: 2021-09-10 11:29:30.698 CST,,,25036,,613acf22.61cc,6,,2021-09-...
备库执行 pg_ctl promote 就报：pg_ctl ：PID file "/postmaster.pid" does not exist ...
方法/步骤 1 1.配置备库recovery.conf配置recovery.confrecovery_target_timeline='latest'standby_mode=onprimary_conninfo='host=192.168.16.26 port=5432 user=repuser' 这个IP要修改为主库的IP#trigger_file='/home/postgres/pgdata/.postgresql.trigger.1921' 并且把这一行...
[postgres@pg01 ~]$ mkdir /var/lib/pgsql/12/arch 1. 主备库传输相关参数 listen_addresses = '*' # (修改)监听所有IP max_connections = 100 # (修改)最大连接数,据说从机需要大于或等于该值 1. 2. 主库信息配置 - pg_hba.conf 在pg_hba.conf文件的最后加入主备库的信息,由于主备库身份是可以...
RemovePromoteSignalFiles函数强制删除signaling standby promotion请求的文件。如果不删除,这些文件的存在会过早触发promotion。删除这些文件通常是没有必要的,因为它们仅仅在standby promotion过程中存在。然而会存在竞态情况: 如果pg_ctl promote被执行并在提升过程中创建了这些文件,这些文件会存在,即使数据库已经是新的...
Objective To investigate the effect and mechanism underlying in which TSPG promote human CD34 + hematopoietic stem and progenitor cells to differentiate into erythroid-lineage cells. Materials and methods The effect of TSPG on erythroid differentiation of purified CD34 + cells derived from umbilical ...
To identify RoHS-compliant products upfront, please note that the package description of a product which has already been converted to green always starts with "PG". Halogen free products feature an H instead of G as the pac...
PG-TQFP-144-27 General Information Package MaterialPG Package FamilyTQFP Terminals144 Version27 Exposed PaddleYes Dimensions Body Length (mm)16 Body Width (mm)16 Min. Terminal Pitch (mm)0.4 Diagrams Footprint Dimensions Package...