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btree page recycling can be done as soon as page's next-xact label is

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older than current Xmin; we don't have to wait till it's older than
GlobalXmin.
This commit is contained in:
Tom Lane
2003-02-23 23:20:52 +00:00
parent 3bbd6af37c
commit 61b22d3aab
4 changed files with 13 additions and 8 deletions
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4
src/backend/access/nbtree/nbtpage.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.62 2003/02/23 22:43:08 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.63 2003/02/23 23:20:52 tgl Exp $
*
* NOTES
* Postgres btree pages look like ordinary relation pages. The opaque
@@ -544,7 +544,7 @@ _bt_page_recyclable(Page page)
*/
opaque = (BTPageOpaque) PageGetSpecialPointer(page);
if (P_ISDELETED(opaque) &&
TransactionIdPrecedesOrEquals(opaque->btpo.xact, RecentGlobalXmin))
TransactionIdPrecedesOrEquals(opaque->btpo.xact, RecentXmin))
return true;
return false;
}