{"Entry":{"collection":"tool","key":"pg-walsummary","name":"pg_walsummary","aliases":["pg_walsummary"],"metadata":{"aliases":["pg_walsummary"],"category":"Server applications","content_hash":"f0a32a58398e9e46cf8e3bbde7ee517839ecb9907499a197c30a6857fb88af97","imported_at":"2026-09-30T00:40:34.499161+08:00","name":"pg_walsummary","name_zh":"","slug":"pg-walsummary","summary":"pg_walsummary — print contents of WAL summary files"}},"Definition":{"Collection":"tool","Key":"pg-walsummary","SourceDatabase":"center","Version":"18","SourceTable":"command_tool","SourceKey":"pg-walsummary","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","Facts":{"comparison_data":{"environment":[],"options":[{"description":"By default, pg_walsummary prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block.","names":["-i","--individual"],"signature":"-i --individual"},{"description":"Do not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents.","names":["-q","--quiet"],"signature":"-q --quiet"},{"description":"Display version information, then exit.","names":["-V","--version"],"signature":"-V --version"},{"description":"Shows help about pg_walsummary command line arguments, and exits.","names":["-?","--help"],"signature":"-? --help"}],"synopsis":["pg_walsummary [ option ...] [ file ...]"]},"comparison_hash":"fb64f9cdf40e6149d88aceecaf06dca1b50a947b10b4f3e3cfe4e833dd789128","description":["pg_walsummary — print contents of WAL summary files"],"environment":[],"facts":[{"label":"Documented executable","value":"pg_walsummary"},{"label":"Executable version","value":"18.6"},{"label":"Reference inventory","value":"Server applications"},{"label":"Option definition groups","value":"4"}],"manual_html":"\u003cdiv\u003e\u003cdiv class=\"refentry\" id=\"APP-PGWALSUMMARY\"\u003e\n\u003cdiv class=\"titlepage\"\u003e\u003c/div\u003e\n\u003cdiv class=\"refnamediv\"\u003e\n\u003ch2\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_walsummary — print contents of WAL summary files\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsynopsisdiv\"\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv class=\"cmdsynopsis\"\u003e\n\u003cp id=\"id-1.9.5.15.4.1\"\u003e\u003ccode class=\"command\"\u003epg_walsummary\u003c/code\u003e [\u003cem class=\"replaceable\"\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...] [\u003cem class=\"replaceable\"\u003e\u003ccode\u003efile\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.5\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e is used to print the contents of WAL summary files. These binary files are found in the \u003ccode class=\"literal\"\u003epg_wal/summaries\u003c/code\u003e subdirectory of the data directory, and can be converted to text using this tool. This is not ordinarily necessary, since WAL summary files primarily exist to support \u003ca class=\"link\" href=\"/docs/18/continuous-archiving.html#BACKUP-INCREMENTAL-BACKUP\" title=\"25.3.3. Making an Incremental Backup\"\u003eincremental backup\u003c/a\u003e, but it may be useful for debugging purposes.\u003c/p\u003e\n\u003cp\u003eA WAL summary file is indexed by tablespace OID, relation OID, and relation fork. For each relation fork, it stores the list of blocks that were modified by WAL within the range summarized in the file. It can also store a \"limit block,\" which is 0 if the relation fork was created or truncated within the relevant WAL range, and otherwise the shortest length to which the relation fork was truncated. If the relation fork was not created, deleted, or truncated within the relevant WAL range, the limit block is undefined or infinite and will not be printed by this tool.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.6\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-i\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--individual\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eBy default, \u003ccode class=\"literal\"\u003epg_walsummary\u003c/code\u003e prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDisplay version information, then exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShows help about \u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e command line arguments, and exits.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.7\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003eThe environment variable \u003ccode class=\"envar\"\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode class=\"literal\"\u003ealways\u003c/code\u003e, \u003ccode class=\"literal\"\u003eauto\u003c/code\u003e and \u003ccode class=\"literal\"\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.8\"\u003e\n\u003ch2\u003eSee Also\u003c/h2\u003e\u003cspan class=\"simplelist\"\u003e\u003ca class=\"xref\" href=\"/docs/18/app-pgbasebackup.html\" title=\"pg_basebackup\"\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_basebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e, \u003ca class=\"xref\" href=\"/docs/18/app-pgcombinebackup.html\" title=\"pg_combinebackup\"\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_combinebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","manual_path":"app-pgwalsummary.html","options":[{"description":"By default, pg_walsummary prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block.","names":["-i","--individual"],"signature":"-i --individual","source_url":"/docs/18/app-pgwalsummary.html","summary":"By default, pg_walsummary prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block."},{"description":"Do not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents.","names":["-q","--quiet"],"signature":"-q --quiet","source_url":"/docs/18/app-pgwalsummary.html","summary":"Do not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents."},{"description":"Display version information, then exit.","names":["-V","--version"],"signature":"-V --version","source_url":"/docs/18/app-pgwalsummary.html","summary":"Display version information, then exit."},{"description":"Shows help about pg_walsummary command line arguments, and exits.","names":["-?","--help"],"signature":"-? --help","source_url":"/docs/18/app-pgwalsummary.html","summary":"Shows help about pg_walsummary command line arguments, and exits."}],"related":[],"release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[],"signature":"pg_walsummary [ option ...] [ file ...]","sources":[{"anchor":"","file":"app-pgwalsummary.html","label":"18.6 English manual · app-pgwalsummary.html","sha256":"d2721b711c04cfa23f2edc8552533bf1d515eec2406ce1ec728b71fd41d9f2ea","url":"/docs/18/app-pgwalsummary.html"},{"anchor":"","file":"reference-server.html","label":"Server applications inventory","sha256":"e9f8bbcc8e3641fadd1d20991e8aad6b532155b786ba5a1b7b364ec4f1a5bef3","url":"/docs/18/reference-server.html"}],"synopsis":["pg_walsummary [ option ...] [ file ...]"],"tables":[{"columns":[{"key":"signature","label":"Option and arguments"},{"key":"summary","label":"Description"}],"key":"options","rows":[{"signature":{"text":"-i --individual","url":"/docs/18/app-pgwalsummary.html"},"summary":"By default, pg_walsummary prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block."},{"signature":{"text":"-q --quiet","url":"/docs/18/app-pgwalsummary.html"},"summary":"Do not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents."},{"signature":{"text":"-V --version","url":"/docs/18/app-pgwalsummary.html"},"summary":"Display version information, then exit."},{"signature":{"text":"-? --help","url":"/docs/18/app-pgwalsummary.html"},"summary":"Shows help about pg_walsummary command line arguments, and exits."}],"title":"Documented options"}]},"ManualEvidence":{"manual_path":"app-pgwalsummary.html","release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"anchor":"","file":"app-pgwalsummary.html","label":"18.6 English manual · app-pgwalsummary.html","sha256":"d2721b711c04cfa23f2edc8552533bf1d515eec2406ce1ec728b71fd41d9f2ea","url":"/docs/18/app-pgwalsummary.html"},{"anchor":"","file":"reference-server.html","label":"Server applications inventory","sha256":"e9f8bbcc8e3641fadd1d20991e8aad6b532155b786ba5a1b7b364ec4f1a5bef3","url":"/docs/18/reference-server.html"}]},"MeasuredEvidence":{}},"Text":{"Collection":"tool","Key":"pg-walsummary","SourceDatabase":"center","Version":"18","Locale":"en","Title":"pg_walsummary","Summary":"pg_walsummary — print contents of WAL summary files","BodyHTML":"\u003cdiv\u003e\u003cdiv id=\"APP-PGWALSUMMARY\"\u003e\n\u003cdiv\u003e\u003c/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e\u003cspan\u003e\u003cspan\u003epg_walsummary\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_walsummary — print contents of WAL summary files\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv\u003e\n\u003cp id=\"id-1.9.5.15.4.1\"\u003e\u003ccode\u003epg_walsummary\u003c/code\u003e [\u003cem\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...] [\u003cem\u003e\u003ccode\u003efile\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.5.15.5\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan\u003epg_walsummary\u003c/span\u003e is used to print the contents of WAL summary files. These binary files are found in the \u003ccode\u003epg_wal/summaries\u003c/code\u003e subdirectory of the data directory, and can be converted to text using this tool. This is not ordinarily necessary, since WAL summary files primarily exist to support \u003ca href=\"/docs/18/continuous-archiving.html#BACKUP-INCREMENTAL-BACKUP\" rel=\"nofollow\"\u003eincremental backup\u003c/a\u003e, but it may be useful for debugging purposes.\u003c/p\u003e\n\u003cp\u003eA WAL summary file is indexed by tablespace OID, relation OID, and relation fork. For each relation fork, it stores the list of blocks that were modified by WAL within the range summarized in the file. It can also store a \u0026#34;limit block,\u0026#34; which is 0 if the relation fork was created or truncated within the relevant WAL range, and otherwise the shortest length to which the relation fork was truncated. If the relation fork was not created, deleted, or truncated within the relevant WAL range, the limit block is undefined or infinite and will not be printed by this tool.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.5.15.6\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-i\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--individual\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eBy default, \u003ccode\u003epg_walsummary\u003c/code\u003e prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don\u0026#39;t care about the contents.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDisplay version information, then exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShows help about \u003cspan\u003epg_walsummary\u003c/span\u003e command line arguments, and exits.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.5.15.7\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003eThe environment variable \u003ccode\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode\u003ealways\u003c/code\u003e, \u003ccode\u003eauto\u003c/code\u003e and \u003ccode\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.5.15.8\"\u003e\n\u003ch2\u003eSee Also\u003c/h2\u003e\u003cspan\u003e\u003ca href=\"/docs/18/app-pgbasebackup.html\" title=\"pg_basebackup\" rel=\"nofollow\"\u003e\u003cspan\u003e\u003cspan\u003epg_basebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/docs/18/app-pgcombinebackup.html\" title=\"pg_combinebackup\" rel=\"nofollow\"\u003e\u003cspan\u003e\u003cspan\u003epg_combinebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","ContentHash":"59d25ac73aedcad31ae687f13be18e2d446b2ba786dc0f2bde66aae1fa3d6378","Payload":{"description":["pg_walsummary — print contents of WAL summary files"],"manual_html":"\u003cdiv\u003e\u003cdiv class=\"refentry\" id=\"APP-PGWALSUMMARY\"\u003e\n\u003cdiv class=\"titlepage\"\u003e\u003c/div\u003e\n\u003cdiv class=\"refnamediv\"\u003e\n\u003ch2\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_walsummary — print contents of WAL summary files\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsynopsisdiv\"\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv class=\"cmdsynopsis\"\u003e\n\u003cp id=\"id-1.9.5.15.4.1\"\u003e\u003ccode class=\"command\"\u003epg_walsummary\u003c/code\u003e [\u003cem class=\"replaceable\"\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...] [\u003cem class=\"replaceable\"\u003e\u003ccode\u003efile\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.5\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e is used to print the contents of WAL summary files. These binary files are found in the \u003ccode class=\"literal\"\u003epg_wal/summaries\u003c/code\u003e subdirectory of the data directory, and can be converted to text using this tool. This is not ordinarily necessary, since WAL summary files primarily exist to support \u003ca class=\"link\" href=\"/docs/18/continuous-archiving.html#BACKUP-INCREMENTAL-BACKUP\" title=\"25.3.3. Making an Incremental Backup\"\u003eincremental backup\u003c/a\u003e, but it may be useful for debugging purposes.\u003c/p\u003e\n\u003cp\u003eA WAL summary file is indexed by tablespace OID, relation OID, and relation fork. For each relation fork, it stores the list of blocks that were modified by WAL within the range summarized in the file. It can also store a \"limit block,\" which is 0 if the relation fork was created or truncated within the relevant WAL range, and otherwise the shortest length to which the relation fork was truncated. If the relation fork was not created, deleted, or truncated within the relevant WAL range, the limit block is undefined or infinite and will not be printed by this tool.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.6\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-i\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--individual\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eBy default, \u003ccode class=\"literal\"\u003epg_walsummary\u003c/code\u003e prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDisplay version information, then exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShows help about \u003cspan class=\"application\"\u003epg_walsummary\u003c/span\u003e command line arguments, and exits.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.7\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003eThe environment variable \u003ccode class=\"envar\"\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode class=\"literal\"\u003ealways\u003c/code\u003e, \u003ccode class=\"literal\"\u003eauto\u003c/code\u003e and \u003ccode class=\"literal\"\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.5.15.8\"\u003e\n\u003ch2\u003eSee Also\u003c/h2\u003e\u003cspan class=\"simplelist\"\u003e\u003ca class=\"xref\" href=\"/docs/18/app-pgbasebackup.html\" title=\"pg_basebackup\"\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_basebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e, \u003ca class=\"xref\" href=\"/docs/18/app-pgcombinebackup.html\" title=\"pg_combinebackup\"\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_combinebackup\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","related":[],"sections":[],"tables":[{"columns":[{"key":"signature","label":"Option and arguments"},{"key":"summary","label":"Description"}],"key":"options","rows":[{"signature":{"text":"-i --individual","url":"/docs/18/app-pgwalsummary.html"},"summary":"By default, pg_walsummary prints one line of output for each range of one or more consecutive modified blocks. This can make the output a lot briefer, since a relation where all blocks from 0 through 999 were modified will produce only one line of output rather than 1000 separate lines. This option requests a separate line of output for every modified block."},{"signature":{"text":"-q --quiet","url":"/docs/18/app-pgwalsummary.html"},"summary":"Do not print any output, except for errors. This can be useful when you want to know whether a WAL summary file can be successfully parsed but don't care about the contents."},{"signature":{"text":"-V --version","url":"/docs/18/app-pgwalsummary.html"},"summary":"Display version information, then exit."},{"signature":{"text":"-? --help","url":"/docs/18/app-pgwalsummary.html"},"summary":"Shows help about pg_walsummary command line arguments, and exits."}],"title":"Documented options"}]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}