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authorTom Lane <tgl@sss.pgh.pa.us>2009-01-12 05:10:45 +0000
committerTom Lane <tgl@sss.pgh.pa.us>2009-01-12 05:10:45 +0000
commitb7b8f0b6096d2ab6e4f67980d19e478cf6fab629 (patch)
treeb72f9703650b8fb051b516ba369c7cc929309004 /src/backend/executor/nodeBitmapOr.c
parent1a37056a74e273085c39bb88cba48797695c067e (diff)
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Implement prefetching via posix_fadvise() for bitmap index scans. A new
GUC variable effective_io_concurrency controls how many concurrent block prefetch requests will be issued. (The best way to handle this for plain index scans is still under debate, so that part is not applied yet --- tgl) Greg Stark
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