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

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

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3. CLOG Pages are never cached in memory?

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

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5. index row headers like table row headers contain xmin and xmax fields?

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6. UPDATE can be regarded as which 2 separate operations?

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

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

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

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

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