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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-21 21:25:42 +0000 |
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| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-21 21:25:42 +0000 |
| commit | cc59049daf78c3d351c1ec78fb319b5fdeb20d53 (patch) | |
| tree | 74c6471e902926264b639164859c2ae69a3420ed /src/backend/utils/adt/regexp.c | |
| parent | 386a5d4268c7ae13510f0a40243b2277eccb6189 (diff) | |
| download | postgresql-cc59049daf78c3d351c1ec78fb319b5fdeb20d53.tar.gz postgresql-cc59049daf78c3d351c1ec78fb319b5fdeb20d53.zip | |
Improve handling of prune/no-prune decisions by storing a page's oldest
unpruned XMAX in its header. At the cost of 4 bytes per page, this keeps us
from performing heap_page_prune when there's no chance of pruning anything.
Seems to be necessary per Heikki's preliminary performance testing.
Diffstat (limited to 'src/backend/utils/adt/regexp.c')
0 files changed, 0 insertions, 0 deletions