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Avoid marking buffer dirty when VACUUM has no work to do.

author Simon Riggs <simon@2ndQuadrant.com>

2011年11月18日 16:06:53 +0000 (16:06 +0000)

committer Simon Riggs <simon@2ndQuadrant.com>

2011年11月18日 16:06:53 +0000 (16:06 +0000)

commit c1458cc495ff800cd176a1c2e56d8b62680d9b71

tree b13653180e37885d81bfbdd838318506d742caf9 tree

parent f6438f66226e37851e11a93edebae0198a875100 commit | diff

Avoid marking buffer dirty when VACUUM has no work to do.
When wal_level = 'hot_standby' we touched the last page of the
relation during a VACUUM, even if nothing else had happened.
That would alter the LSN of the last block and set the mtime
of the relation file unnecessarily. Noted by Thom Brown.

src/backend/access/nbtree/nbtpage.c diff | blob | blame | history

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