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. Which function can we use to find the current transaction ID?

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

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3. If a transaction aborts, all page changes are reverted(rolled back) in place?

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

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

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6. The page header is located in the highest address?

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

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8. The page Special Space is located at the start of the page with highest address

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9. Information about subtransactions is stored under?

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10. Page free space can often become fragmented?

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