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

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

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3. Page free space can often become fragmented?

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4. Information about subtransactions is stored under?

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

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6. In Postgres, tables are often referred to as which of the below?

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

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8. If a transaction is read only which kind of Transaction ID is it allocated?

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9. a transaction containing a savepoint is will still be considered as only a single transaction?

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10. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

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