pagevis

Visualise database pages in ascii code

STAT

PIGSTY

pagevis : Visualise database pages in ascii code

Overview

ID	Extension	Package	Version	Category	License	Language
6860	pagevis	pagevis	`0.1`	STAT	MIT	SQL

Attribute	Has Binary	Has Library	Need Load	Has DDL	Relocatable	Trusted
----d-r	No	No	No	Yes	yes	no

Relationships
See Also	pg_buffercache pageinspect toastinfo pg_visibility pg_freespacemap pgstattuple pgfincore pgcozy pg_prewarm

Packages

Type	Repo	Version	PG Major Compatibility	Package Pattern	Dependencies
EXT	PIGSTY	`0.1`	18 17 16 15 14	`pagevis`	-
RPM	PIGSTY	`0.1`	18 17 16 15 14	`pagevis_$v`	-
DEB	PIGSTY	`0.1`	18 17 16 15 14	`postgresql-$v-pagevis`	-

Linux / PG	PG18	PG17	PG16	PG15	PG14
el8.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
el8.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
el9.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
el9.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
el10.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
el10.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
d12.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
d12.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
d13.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
d13.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u22.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u22.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u24.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u24.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u26.x86_64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1
u26.aarch64	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1	PIGSTY 0.1

Package	Version	OS	ORG	SIZE	File URL
`pagevis_18`	`0.1`	el8.x86_64	pigsty	8.1 KiB	pagevis_18-0.1-1PIGSTY.el8.x86_64.rpm
`pagevis_18`	`0.1`	el8.aarch64	pigsty	8.1 KiB	pagevis_18-0.1-1PIGSTY.el8.aarch64.rpm
`pagevis_18`	`0.1`	el9.x86_64	pigsty	8.2 KiB	pagevis_18-0.1-1PIGSTY.el9.x86_64.rpm
`pagevis_18`	`0.1`	el9.aarch64	pigsty	8.1 KiB	pagevis_18-0.1-1PIGSTY.el9.aarch64.rpm
`pagevis_18`	`0.1`	el10.x86_64	pigsty	8.2 KiB	pagevis_18-0.1-1PIGSTY.el10.x86_64.rpm
`pagevis_18`	`0.1`	el10.aarch64	pigsty	8.2 KiB	pagevis_18-0.1-1PIGSTY.el10.aarch64.rpm
`postgresql-18-pagevis`	`0.1`	d12.x86_64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~bookworm_amd64.deb
`postgresql-18-pagevis`	`0.1`	d12.aarch64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~bookworm_arm64.deb
`postgresql-18-pagevis`	`0.1`	d13.x86_64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~trixie_amd64.deb
`postgresql-18-pagevis`	`0.1`	d13.aarch64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~trixie_arm64.deb
`postgresql-18-pagevis`	`0.1`	u22.x86_64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~jammy_amd64.deb
`postgresql-18-pagevis`	`0.1`	u22.aarch64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~jammy_arm64.deb
`postgresql-18-pagevis`	`0.1`	u24.x86_64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~noble_amd64.deb
`postgresql-18-pagevis`	`0.1`	u24.aarch64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~noble_arm64.deb
`postgresql-18-pagevis`	`0.1`	u26.x86_64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~resolute_amd64.deb
`postgresql-18-pagevis`	`0.1`	u26.aarch64	pigsty	5.2 KiB	postgresql-18-pagevis_0.1-1PIGSTY~resolute_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`pagevis_17`	`0.1`	el8.x86_64	pigsty	8.1 KiB	pagevis_17-0.1-1PIGSTY.el8.x86_64.rpm
`pagevis_17`	`0.1`	el8.aarch64	pigsty	8.1 KiB	pagevis_17-0.1-1PIGSTY.el8.aarch64.rpm
`pagevis_17`	`0.1`	el9.x86_64	pigsty	8.2 KiB	pagevis_17-0.1-1PIGSTY.el9.x86_64.rpm
`pagevis_17`	`0.1`	el9.aarch64	pigsty	8.1 KiB	pagevis_17-0.1-1PIGSTY.el9.aarch64.rpm
`pagevis_17`	`0.1`	el10.x86_64	pigsty	8.2 KiB	pagevis_17-0.1-1PIGSTY.el10.x86_64.rpm
`pagevis_17`	`0.1`	el10.aarch64	pigsty	8.2 KiB	pagevis_17-0.1-1PIGSTY.el10.aarch64.rpm
`postgresql-17-pagevis`	`0.1`	d12.x86_64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~bookworm_amd64.deb
`postgresql-17-pagevis`	`0.1`	d12.aarch64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~bookworm_arm64.deb
`postgresql-17-pagevis`	`0.1`	d13.x86_64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~trixie_amd64.deb
`postgresql-17-pagevis`	`0.1`	d13.aarch64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~trixie_arm64.deb
`postgresql-17-pagevis`	`0.1`	u22.x86_64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~jammy_amd64.deb
`postgresql-17-pagevis`	`0.1`	u22.aarch64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~jammy_arm64.deb
`postgresql-17-pagevis`	`0.1`	u24.x86_64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~noble_amd64.deb
`postgresql-17-pagevis`	`0.1`	u24.aarch64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~noble_arm64.deb
`postgresql-17-pagevis`	`0.1`	u26.x86_64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~resolute_amd64.deb
`postgresql-17-pagevis`	`0.1`	u26.aarch64	pigsty	5.2 KiB	postgresql-17-pagevis_0.1-1PIGSTY~resolute_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`pagevis_16`	`0.1`	el8.x86_64	pigsty	8.1 KiB	pagevis_16-0.1-1PIGSTY.el8.x86_64.rpm
`pagevis_16`	`0.1`	el8.aarch64	pigsty	8.1 KiB	pagevis_16-0.1-1PIGSTY.el8.aarch64.rpm
`pagevis_16`	`0.1`	el9.x86_64	pigsty	8.2 KiB	pagevis_16-0.1-1PIGSTY.el9.x86_64.rpm
`pagevis_16`	`0.1`	el9.aarch64	pigsty	8.1 KiB	pagevis_16-0.1-1PIGSTY.el9.aarch64.rpm
`pagevis_16`	`0.1`	el10.x86_64	pigsty	8.2 KiB	pagevis_16-0.1-1PIGSTY.el10.x86_64.rpm
`pagevis_16`	`0.1`	el10.aarch64	pigsty	8.2 KiB	pagevis_16-0.1-1PIGSTY.el10.aarch64.rpm
`postgresql-16-pagevis`	`0.1`	d12.x86_64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~bookworm_amd64.deb
`postgresql-16-pagevis`	`0.1`	d12.aarch64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~bookworm_arm64.deb
`postgresql-16-pagevis`	`0.1`	d13.x86_64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~trixie_amd64.deb
`postgresql-16-pagevis`	`0.1`	d13.aarch64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~trixie_arm64.deb
`postgresql-16-pagevis`	`0.1`	u22.x86_64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~jammy_amd64.deb
`postgresql-16-pagevis`	`0.1`	u22.aarch64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~jammy_arm64.deb
`postgresql-16-pagevis`	`0.1`	u24.x86_64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~noble_amd64.deb
`postgresql-16-pagevis`	`0.1`	u24.aarch64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~noble_arm64.deb
`postgresql-16-pagevis`	`0.1`	u26.x86_64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~resolute_amd64.deb
`postgresql-16-pagevis`	`0.1`	u26.aarch64	pigsty	5.2 KiB	postgresql-16-pagevis_0.1-1PIGSTY~resolute_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`pagevis_15`	`0.1`	el8.x86_64	pigsty	8.1 KiB	pagevis_15-0.1-1PIGSTY.el8.x86_64.rpm
`pagevis_15`	`0.1`	el8.aarch64	pigsty	8.1 KiB	pagevis_15-0.1-1PIGSTY.el8.aarch64.rpm
`pagevis_15`	`0.1`	el9.x86_64	pigsty	8.2 KiB	pagevis_15-0.1-1PIGSTY.el9.x86_64.rpm
`pagevis_15`	`0.1`	el9.aarch64	pigsty	8.1 KiB	pagevis_15-0.1-1PIGSTY.el9.aarch64.rpm
`pagevis_15`	`0.1`	el10.x86_64	pigsty	8.2 KiB	pagevis_15-0.1-1PIGSTY.el10.x86_64.rpm
`pagevis_15`	`0.1`	el10.aarch64	pigsty	8.2 KiB	pagevis_15-0.1-1PIGSTY.el10.aarch64.rpm
`postgresql-15-pagevis`	`0.1`	d12.x86_64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~bookworm_amd64.deb
`postgresql-15-pagevis`	`0.1`	d12.aarch64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~bookworm_arm64.deb
`postgresql-15-pagevis`	`0.1`	d13.x86_64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~trixie_amd64.deb
`postgresql-15-pagevis`	`0.1`	d13.aarch64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~trixie_arm64.deb
`postgresql-15-pagevis`	`0.1`	u22.x86_64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~jammy_amd64.deb
`postgresql-15-pagevis`	`0.1`	u22.aarch64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~jammy_arm64.deb
`postgresql-15-pagevis`	`0.1`	u24.x86_64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~noble_amd64.deb
`postgresql-15-pagevis`	`0.1`	u24.aarch64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~noble_arm64.deb
`postgresql-15-pagevis`	`0.1`	u26.x86_64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~resolute_amd64.deb
`postgresql-15-pagevis`	`0.1`	u26.aarch64	pigsty	5.2 KiB	postgresql-15-pagevis_0.1-1PIGSTY~resolute_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`pagevis_14`	`0.1`	el8.x86_64	pigsty	8.1 KiB	pagevis_14-0.1-1PIGSTY.el8.x86_64.rpm
`pagevis_14`	`0.1`	el8.aarch64	pigsty	8.1 KiB	pagevis_14-0.1-1PIGSTY.el8.aarch64.rpm
`pagevis_14`	`0.1`	el9.x86_64	pigsty	8.2 KiB	pagevis_14-0.1-1PIGSTY.el9.x86_64.rpm
`pagevis_14`	`0.1`	el9.aarch64	pigsty	8.1 KiB	pagevis_14-0.1-1PIGSTY.el9.aarch64.rpm
`pagevis_14`	`0.1`	el10.x86_64	pigsty	8.2 KiB	pagevis_14-0.1-1PIGSTY.el10.x86_64.rpm
`pagevis_14`	`0.1`	el10.aarch64	pigsty	8.2 KiB	pagevis_14-0.1-1PIGSTY.el10.aarch64.rpm
`postgresql-14-pagevis`	`0.1`	d12.x86_64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~bookworm_amd64.deb
`postgresql-14-pagevis`	`0.1`	d12.aarch64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~bookworm_arm64.deb
`postgresql-14-pagevis`	`0.1`	d13.x86_64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~trixie_amd64.deb
`postgresql-14-pagevis`	`0.1`	d13.aarch64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~trixie_arm64.deb
`postgresql-14-pagevis`	`0.1`	u22.x86_64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~jammy_amd64.deb
`postgresql-14-pagevis`	`0.1`	u22.aarch64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~jammy_arm64.deb
`postgresql-14-pagevis`	`0.1`	u24.x86_64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~noble_amd64.deb
`postgresql-14-pagevis`	`0.1`	u24.aarch64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~noble_arm64.deb
`postgresql-14-pagevis`	`0.1`	u26.x86_64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~resolute_amd64.deb
`postgresql-14-pagevis`	`0.1`	u26.aarch64	pigsty	5.2 KiB	postgresql-14-pagevis_0.1-1PIGSTY~resolute_arm64.deb

Source

Repository

github.com/hollobon/pagevis

Source Tarball

pagevis-0.1.tar.gz

pig build pkg pagevis;		# build rpm/deb

Install

Make sure PGDG and PIGSTY repo available:

pig repo add pgsql -u   # add both repo and update cache

Install this extension with pig:

pig install pagevis;		# install via package name, for the active PG version

pig install pagevis -v 18;   # install for PG 18
pig install pagevis -v 17;   # install for PG 17
pig install pagevis -v 16;   # install for PG 16
pig install pagevis -v 15;   # install for PG 15
pig install pagevis -v 14;   # install for PG 14

Create this extension with:

CREATE EXTENSION pagevis;

Usage

pagevis: ASCII visualization of PostgreSQL database pages

pagevis provides an ASCII-graphical representation of the contents of a PostgreSQL database page. It requires the pageinspect extension.

Function

-- show_page(relation, block_number, line_width)
SELECT show_page('my_table', 0, 64);

Output Characters

Character	Meaning
`P`	Page header
`U`	Unused line pointer
`N`	Normal line pointer
`R`	Redirect line pointer
`D`	Dead line pointer
(space)	Free space (the “hole”)
`[n]`	Tuple number (overlaid on tuple header)
`H`	Tuple header
`#`	Tuple data
`-`	Tuple invisible to current transaction (dead)
`.`	Inter-tuple padding

Example

SELECT show_page('pvtest', 0, 64);
                             show_page
------------------------------------------------------------------
 PPPPPPPPPPPPPPPPPPPPPPPP001N002N003N004N005N006N007N008N009N010N
 011N012N013N014N015N016N017N018N019N020N...

 [226]HHHHHHHHHHHHHHHHHHH####....[225]HHHHHHHHHHHHHHHHHHH####....
 [224]HHHHHHHHHHHHHHHHHHH####....[223]HHHHHHHHHHHHHHHHHHH####....

The page header (P) and line pointers (N) appear at the start, free space in the middle, and tuples grow from the end of the page backward. The page is full when no more space remains between line pointers and tuples.

Requires superuser access (uses pageinspect’s get_raw_page).