不记录 WAL 的表（UNLOGGED）
已记录的来源状态与原始语言说明；缺少版本证据时明确标为未知。
来源快照记录 PostgreSQL 8.1–18 的变化节点；历史矩阵独立记录 7.4–18 的状态。两者均未记录 PostgreSQL 19 或 20 的支持状态，较新版本明确保留为未知。这些来源声明与运行测量相互独立。
性能
说明
此类表比普通表提供更好的更新性能，但不具有崩溃安全性：在服务器崩溃时其内容会自动清除。其内容也不会传播到从库。
所选版本: PostgreSQL 18
支持
比较版本
原始文档链接
已记录旧标识: 201
完整来源事实与出处
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
{
"Key": "unlogged-tables",
"SourceKind": "yaml",
"SourceDatabase": "center",
"SourceTable": "featurematrix.yaml",
"SourceKey": "Unlogged tables",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"Name": "Unlogged tables",
"NameLocale": "en",
"GroupKey": "performance",
"GroupName": "Performance",
"GroupLocale": "en",
"Ordinal": 52,
"GroupOrder": 5,
"Facts": {
"feature": {
"description": "Such tables provide better update performance than regular tables, but are not crash-safe: their contents are automatically cleared in case of a server crash. Their contents do not propagate to replication slaves, either.",
"name": "Unlogged tables",
"versions": {
"9.1": "Yes"
}
},
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"versions": {
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"min": 8.1
}
},
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"Original": "Yes"
},
{
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"Original": "Yes"
},
{
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},
{
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},
{
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},
{
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{
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},
{
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"Original": "Yes"
},
{
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},
{
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"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
"Version": "8.2",
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"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
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},
{
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"Supported": false,
"Original": "No"
},
{
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"EvidenceKind": "yaml-default-no",
"TransitionVersion": "",
"Supported": false,
"Original": "No"
},
{
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"Supported": true,
"Original": "Yes"
},
{
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},
{
"Version": "9.3",
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},
{
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},
{
"Version": "9.5",
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"Original": "Yes"
},
{
"Version": "9.6",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.1",
"Supported": true,
"Original": "Yes"
}
],
"Texts": [
{
"Locale": "en",
"Title": "Unlogged tables",
"BodyHTML": "\u003cp\u003eSuch tables provide better update performance than regular tables, but are not crash-safe: their contents are automatically cleared in case of a server crash. Their contents do not propagate to replication slaves, either.\u003c/p\u003e\n",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"ContentHash": "6476587c955364855f8028e2896863b81c2a45b03db5380831dbecba64d5b904",
"Payload": {
"description": "Such tables provide better update performance than regular tables, but are not crash-safe: their contents are automatically cleared in case of a server crash. Their contents do not propagate to replication slaves, either.",
"name": "Unlogged tables",
"versions": {
"9.1": "Yes"
}
}
},
{
"Locale": "zh-Hans",
"Title": "不记录 WAL 的表（UNLOGGED）",
"BodyHTML": "\u003cp\u003e此类表比普通表提供更好的更新性能，但不具有崩溃安全性：在服务器崩溃时其内容会自动清除。其内容也不会传播到从库。\u003c/p\u003e\n",
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"Payload": {
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"name": "不记录 WAL 的表（UNLOGGED）"
}
}
],
"GroupTitles": {
"en": "Performance",
"zh-Hans": "性能"
},
"LegacyIDs": [
"201"
]
}