Frozen page map
Recorded source states and original language descriptions. Missing version evidence stays unknown.
The source snapshot records transitions for PostgreSQL 8.1–18. The historical matrix records independent cells for 7.4–18. Neither records support for PostgreSQL 19 or 20; newer versions remain unknown. These source claims are distinct from runtime measurements.
Performance
Description
Frozen page data in visibility map to prevent re-vacuuming already-frozen pages during wraparound.
Selected version: PostgreSQL 18
Yes
Compare versions
Original documentation links
Recorded legacy identifiers: 287
Complete source facts and provenance
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
{
"Key": "frozen-page-map",
"SourceKind": "yaml",
"SourceDatabase": "center",
"SourceTable": "featurematrix.yaml",
"SourceKey": "Frozen page map",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"Name": "Frozen page map",
"NameLocale": "en",
"GroupKey": "performance",
"GroupName": "Performance",
"GroupLocale": "en",
"Ordinal": 13,
"GroupOrder": 5,
"Facts": {
"feature": {
"description": "Frozen page data in visibility map to prevent re-vacuuming already-frozen pages during wraparound.",
"name": "Frozen page map",
"versions": {
"9.6": "Yes"
}
},
"group": "Performance",
"versions": {
"max": 18,
"min": 8.1
}
},
"Cells": [
{
"Version": "10",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "11",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "12",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "13",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "14",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "15",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "16",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "17",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "18",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
},
{
"Version": "8.1",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "8.2",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "8.3",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "8.4",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.0",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.1",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.2",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.3",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.4",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.5",
"State": "no",
"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "9.6",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.6",
"Supported": true,
"Original": "Yes"
}
],
"Texts": [
{
"Locale": "en",
"Title": "Frozen page map",
"BodyHTML": "\u003cp\u003eFrozen page data in visibility map to prevent re-vacuuming already-frozen pages during wraparound.\u003c/p\u003e\n",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"ContentHash": "4a91f2f67f0a569bfd6e11dc1449133a89dcd21050941faded5425925357c0cb",
"Payload": {
"description": "Frozen page data in visibility map to prevent re-vacuuming already-frozen pages during wraparound.",
"name": "Frozen page map",
"versions": {
"9.6": "Yes"
}
}
},
{
"Locale": "zh-Hans",
"Title": "已冻结页面映射",
"BodyHTML": "\u003cp\u003e可见性映射中的冻结页面数据，防止在回卷期间重新清理已冻结的页面。\u003c/p\u003e\n",
"SourceHash": "071091951021357a5f492adb04caed6febf4d315ac2626ca027a48dd8ec01d50",
"ContentHash": "79e9f11ac3eaa0d858a029e5cbfa746ff1cbbd46292746c81e14caebe4dac99e",
"Payload": {
"description": "可见性映射中的冻结页面数据，防止在回卷期间重新清理已冻结的页面。",
"name": "已冻结页面映射"
}
}
],
"GroupTitles": {
"en": "Performance",
"zh-Hans": "性能"
},
"LegacyIDs": [
"287"
]
}