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authorHeikki Linnakangas <heikki.linnakangas@iki.fi>2009-01-22 19:25:00 +0000
committerHeikki Linnakangas <heikki.linnakangas@iki.fi>2009-01-22 19:25:00 +0000
commitbf136cf6e376ae1a636341e5c8471c55299f9122 (patch)
tree7be7ebf321713f1eaa365c929004c26355c7c486 /src/backend/commands/tablespace.c
parentc079090bbc8ab43525d07cbd9572a3b0a76051aa (diff)
downloadpostgresql-bf136cf6e376ae1a636341e5c8471c55299f9122.tar.gz
postgresql-bf136cf6e376ae1a636341e5c8471c55299f9122.zip
Only skip pages marked as clean in the visibility map, if the last 32
pages were marked as clean as well. The idea is to avoid defeating OS readahead by skipping a page here and there, and also makes it less likely that we miss an opportunity to advance relfrozenxid, for the sake of only a few skipped pages.
Diffstat (limited to 'src/backend/commands/tablespace.c')
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