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.

1 / 10

at any one time Postgres can have several versions of a row?

2 / 10

CLOG files are stored in which directory?

3 / 10

Each page has a layer that usually consists of?

choose 2

4 / 10

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

5 / 10

Information about subtransactions is stored under?

6 / 10

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

7 / 10

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

8 / 10

CLOG contains how many bits for each transaction?

9 / 10

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

10 / 10

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

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