Commitebd33f2

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doc: mention more changes needed to use huge pages

Report by Laurence Parry

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Original file line number	Diff line number	Diff line change
`@@ -1360,6 +1360,13 @@ $ <userinput>sysctl -w vm.nr_hugepages=3170</userinput>`
`1360`	`1360`	`this setting through reboots.`
`1361`	`1361`	`</para>`
`1362`	`1362`
	`1363`	`+ <para>`
	`1364`	`+ It is also necessary to give the database server operating system`
	`1365`	`+ user permission to use huge pages by setting`
	`1366`	`+ <varname>vm.hugetlb_shm_group</> via <application>sysctl</>, and`
	`1367`	`+ permission to lock memory with <command>ulimit -l</>.`
	`1368`	`+ </para>`
	`1369`	`+`
`1363`	`1370`	`<para>`
`1364`	`1371`	`The default behavior for huge pages in`
`1365`	`1372`	`<productname>PostgreSQL</productname> is to use them when possible and`

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