PostgreSQL 14 Internals Quiz

Created by Paul Sammy

PostgreSQL 14 Internals Chapter 3

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 3.

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1. status of a subtransaction is written into CLOG?

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2. at any one time Postgres can have several versions of a row?

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3. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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4. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

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5. When a transaction is committed Postgres uses a special <replace with answer> structure?

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6. When a row is created, its xmin value is set to the transaction ID of which command?

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7. virtual IDs exist only in PGDATA/pg_vxid when not cached?

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8. psql provides a special mode that allows you to continue a transaction after a failure?

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9. Which of the below are true about a Pages Item Pointer?

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10. UPDATE can be regarded as which 2 separate operations?

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