walreceiver启动后通过recovery.conf文件中的primary_conninfo参数信息连向主库,主库通过连接参数replication=true启动walsender进程。 walreceiver执行identify_system命令,获取主库systemid/timeline/xlogpos等信息,执行TIMELINE_HISTORY命令拉取history文件。 执行wal_startstreaming开始启动流复制,通过walrcv_receive获取WAL日志...
• IDENTIFY_SYSTEM:这需要服务器识别自己。服务器回复四个字段(systemid、timeline、xlogpos、dbname)。This requires the server to identify itself. The server replies with four fields (systemid, timeline, xlogpos, dbname). • TIMELINE_HISTORY tli:这请求服务器发送给定时间线的时间线历史文件。响应由...
pg_ident.conf: new ways to identify users in PostgreSQL Query jumbling for DDL and utility statements New function: bt_multi_page_stats New function: pg_split_walfile_name pg_walinspect, pg_waldump: collecting page images from WALDecember 31, 2022 • PostgreSQL PostgreSQL 16: part 3 or...
Your Postgres commands in one place. Learn how to use psql to list and create Postgres databases, show your tables, enter your Postgres terminal, and more.
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Postgres service allows you to provision PostgreSQL databases instances and store your data in them. PostgreSQL is an object-oriented relational database management system to store data securely for ...
Built-in platform and CLI tools help you understand system performance at a glance, with key metrics like CPU, IOPS, connections, and storage resources. Postgres Insights enhances database performance with automated assistance for monitoring cache hit ratio, index hits, and slow queries. ...
The pgpro_pwr module, designed to identify the most resource-intensive operations in the database, has been updated to version 4.7 and received additional features - a mechanism of intermediate samples for collecting relatively rapidly changing data, new report tables, in particular related to sessio...
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Not all of Postgres' internals are included or even wrapped. This isn't due to it not being possible, it's simply due to it being an incredibly large task. If you identify internal Postgres APIs you need, open an issue and we'll get them exposed, at least through thepgrx::pg_sysmo...