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

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

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

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

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6. indexes do not use row versioning?

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7. Rows of TOAST tables are handled in such a way that they are never update?

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

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9. Page free space can often become fragmented?

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

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