Commit915116b

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Correct WAL space calculation formula in docs.

Error pointed out by Fujii Masao, though not his patch.

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Original file line number	Diff line number	Diff line change
`@@ -450,9 +450,9 @@`
`450`	`450`
`451`	`451`	`<para>`
`452`	`452`	`There will always be at least one WAL segment file, and will normally`
`453`		`- not be more than(2 + <varname>checkpoint_completion_target</varname>) * <varname>checkpoint_segments</varname> + 1`
`454`		`-or<varname>checkpoint_segments</> + <xref linkend="guc-wal-keep-segments"> + 1`
`455`		`-files.Each segment file is normally 16 MB (though this size can be`
	`453`	`+ not be morefilesthanthe higher of <xref linkend="guc-wal-keep-segments"> or`
	`454`	`+(2 +<varname>checkpoint_completion_target</varname>) * <varname>checkpoint_segments</varname> + 1.`
	`455`	`+ Each segment file is normally 16 MB (though this size can be`
`456`	`456`	`altered when building the server). You can use this to estimate space`
`457`	`457`	`requirements for <acronym>WAL</acronym>.`
`458`	`458`	`Ordinarily, when old log segment files are no longer needed, they`

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