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 of the below are true about a Pages Item Pointer?

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2. Information about subtransactions is stored under?

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

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

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

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6. CLOG Pages are never cached in memory?

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

choose 2

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8. Which 2 items does a Virtual XID consist of?

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9. indexes do not use row versioning?

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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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