{"kind": "storage", "major": "18", "item": {"slug": "storage-init", "name": "The Initialization Fork", "name_zh": "", "category": "Physical structures", "summary": "Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).", "aliases": [], "content_hash": "a18ade5300bccdd3f31eb018e6647dd9bcca067ae9248db8c1349b8232af810e", "versions": {"10": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/relopts/?v=10", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v10.23/postgresql-10.23.tar.bz2", "label": "10.23", "major": "10", "channel": "stable", "revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "sources": [{"url": "/docs/10/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 10 English manual", "sha256": "a311181299620eb3d6b98ff645deac7c6a81fca5482bf9e19c0f4bdd0d360b30"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

67.5.\u00a0The Initialization Fork

\n
\n
\n
\n\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/10/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "11": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/relopts/?v=11", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v11.22/postgresql-11.22.tar.bz2", "label": "11.22", "major": "11", "channel": "stable", "revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "sources": [{"url": "/docs/11/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 11 English manual", "sha256": "00e370240b23e8a4cd2778e467c249ee2f02bbba330fc892becaa2fc94426661"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

69.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/11/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "12": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=12", "label": "Table AM"}, {"url": "/wiki/relopts/?v=12", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v12.22/postgresql-12.22.tar.bz2", "label": "12.22", "major": "12", "channel": "stable", "revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "sources": [{"url": "/docs/12/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 12 English manual", "sha256": "352e4da151186ae8cdcf2af0ad8371e3134b832564956777f06c5adf0d10b96a"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

69.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/12/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "13": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=13", "label": "Table AM"}, {"url": "/wiki/relopts/?v=13", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v13.23/postgresql-13.23.tar.bz2", "label": "13.23", "major": "13", "channel": "stable", "revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "sources": [{"url": "/docs/13/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 13 English manual", "sha256": "d3b4664d0e7feaf105a8d86964d42a647f28430b81dfb79de31c28347aa73f02"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

69.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/13/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "14": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=14", "label": "Table AM"}, {"url": "/wiki/relopts/?v=14", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v14.24/postgresql-14.24.tar.bz2", "label": "14.24", "major": "14", "channel": "stable", "revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "sources": [{"url": "/docs/14/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 14 English manual", "sha256": "8921d5475675679bcda9a382d1290d9c4668a739b4f91f072ebafeb3c6c563e6"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

70.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/14/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "15": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=15", "label": "Table AM"}, {"url": "/wiki/relopts/?v=15", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v15.19/postgresql-15.19.tar.bz2", "label": "15.19", "major": "15", "channel": "stable", "revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "sources": [{"url": "/docs/15/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 15 English manual", "sha256": "bd530b009f77194e57bd655277fb43b3275445b4a44ad5555738eedaba1348bf"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

73.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/15/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "16": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=16", "label": "Table AM"}, {"url": "/wiki/relopts/?v=16", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "label": "16.15", "major": "16", "channel": "stable", "revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sources": [{"url": "/docs/16/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 16 English manual", "sha256": "da9acd31cf47b567005cab27f65fa48882ac1b14a4c43d19db1dc8aff5893997"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

73.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/16/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "17": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=17", "label": "Table AM"}, {"url": "/wiki/relopts/?v=17", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "/docs/17/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 17 English manual", "sha256": "493adbeb96516a121b293fa1d559e9b6c55b0505cd41edf9c504ab918f64e36a"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

65.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/17/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "18": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=18", "label": "Table AM"}, {"url": "/wiki/relopts/?v=18", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "/docs/18/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 18 English manual", "sha256": "79768878a7e86ebbbac761f6b94f2ddff38a6a9d1acd0aea31f92917a7ca449f"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

66.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/18/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "19": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=19", "label": "Table AM"}, {"url": "/wiki/relopts/?v=19", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v19beta4/postgresql-19beta4.tar.bz2", "label": "19beta4", "major": "19", "channel": "preview", "revision": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}, "sources": [{"url": "/docs/19/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 19 English manual", "sha256": "215c2bb5e619aad2b6e1253d2c3a3abde24f337e247f75835657d03a633403ca"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

66.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/19/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "20": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=20", "label": "Table AM"}, {"url": "/wiki/relopts/?v=20", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.bz2", "label": "20devel", "major": "20", "channel": "devel", "revision": "4d3346909b201ac1648232cf290462a7070c119326f56196f1f0253ed80fae41"}, "sources": [{"url": "/docs/devel/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 20 English manual", "sha256": "71e618de8b39f6e3078f235df8bfa68e53720687a355c06e078fecad4ace746a"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

66.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/devel/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}}}, "snapshot": {"facts": [{"label": "Definition scope", "value": "Same-version core physical storage documentation"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=18", "label": "Table AM"}, {"url": "/wiki/relopts/?v=18", "label": "Storage Parameters"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "/docs/18/storage-init.html", "path": "storage-init.html", "label": "PostgreSQL 18 English manual", "sha256": "79768878a7e86ebbbac761f6b94f2ddff38a6a9d1acd0aea31f92917a7ca449f"}], "sections": [], "signature": "", "description": ["Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed)."], "manual_html": "
\n
\n
\n
\n

66.5.\u00a0The Initialization Fork

\n
\n
\n
\n

Each unlogged table, and each index on an unlogged table, has an initialization fork. The initialization fork is an empty table or index of the appropriate type. When an unlogged table must be reset to empty due to a crash, the initialization fork is copied over the main fork, and any other forks are erased (they will be recreated automatically as needed).

\n
", "manual_path": "/docs/18/storage-init.html", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5"}, "comparison": {"left": "17", "right": "18", "status": "unchanged", "diff": ""}}