PostgreSQL 面试题与答案
问题 26. How do you perform database replication in PostgreSQL?
PostgreSQL supports various replication methods, including streaming replication and logical replication. Streaming replication is a physical replication method, while logical replication replicates changes at the SQL level.
问题 27. Explain the difference between a hot standby and a warm standby in PostgreSQL replication.
A hot standby is a replica that is actively applying changes from the primary server and is ready for failover. A warm standby is a replica that is not actively applying changes but can quickly take over in case of a primary failure.
问题 28. What is the purpose of the pg_dumpall utility in PostgreSQL?
The pg_dumpall utility is used to create a SQL script that can reconstruct an entire PostgreSQL database cluster, including all databases, users, and privileges.
问题 29. Explain the concept of table partitioning in PostgreSQL and its benefits.
Table partitioning involves dividing a large table into smaller, more manageable pieces called partitions. It can improve query performance, simplify data management, and enhance maintenance operations.
问题 30. What is the purpose of the pg_stat_bgwriter view in PostgreSQL?
The pg_stat_bgwriter view provides statistics about the background writer process in PostgreSQL, helping monitor and optimize the writing of dirty buffers to disk.
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