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

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

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

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4. Page free space can often become fragmented?

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5. Each page has a layer that usually consists of?

choose 2

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6. CLOG contains how many bits for each transaction?

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7. What does an Item Pointer contain?

choose 3

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

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9. CLOG Pages are never cached in memory?

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

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