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. Information about subtransactions is stored under?

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

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4. CLOG files are stored in which directory?

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

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6. Page header sizes can be easily displayed using the <choose from answers> extension

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7. Postgres table physical data files are always cross compatible across platforms?

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

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

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10. Which 2 of the below represent transaction IDs used for row versioning?

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