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Improve documentation of data_sync_retry

Reflecting an updated parameter value requires a server restart, whichwas not mentioned in the documentation and in postgresql.conf.sample.Reported-by: Thomas PotyDiscussion:https://postgr.es/m/15659-0cd812f13027a2d8@postgresql.org

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doc/src/sgml
- config.sgml
src/backend/utils/misc
- postgresql.conf.sample

2 files changed

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`‎doc/src/sgml/config.sgml‎`

Lines changed: 2 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -8791,7 +8791,8 @@ dynamic_library_path = 'C:\tools\postgresql;H:\my_project\lib;$libdir'`
`8791`	`8791`	`<para>`
`8792`	`8792`	`When set to off, which is the default, <productname>PostgreSQL</productname>`
`8793`	`8793`	`will raise a PANIC-level error on failure to flush modified data files`
`8794`		`- to the filesystem. This causes the database server to crash.`
	`8794`	`+ to the filesystem. This causes the database server to crash. This`
	`8795`	`+ parameter can only be set at server start.`
`8795`	`8796`	`</para>`
`8796`	`8797`	`<para>`
`8797`	`8798`	`On some operating systems, the status of data in the kernel's page`

`‎src/backend/utils/misc/postgresql.conf.sample‎`

Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -719,7 +719,9 @@`
`719`	`719`
`720`	`720`	`#exit_on_error = off# terminate session on any error?`
`721`	`721`	`#restart_after_crash = on# reinitialize after backend crash?`
`722`		`-#data_sync_retry = off# retry or panic on failure to fsync data?`
	`722`	`+#data_sync_retry = off# retry or panic on failure to fsync`
	`723`	`+# data?`
	`724`	`+# (change requires restart)`
`723`	`725`
`724`	`726`
`725`	`727`	`#------------------------------------------------------------------------------`

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Commitb3a1568

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2 files changed

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`‎doc/src/sgml/config.sgml‎`

`‎src/backend/utils/misc/postgresql.conf.sample‎`

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