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| author | Bruce Momjian <bruce@momjian.us> | 2012-11-14 17:32:04 -0500 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2012-11-14 17:32:07 -0500 |
| commit | 29add0de4920e4f448a30bfc35798b939c211d97 (patch) | |
| tree | b6bfd2849a44b9822a7f36c84fde931a121833c1 /doc/src/sgml/ref | |
| parent | a235b85a0ba06666dbbfdb9249a65dbfa9b42ebd (diff) | |
In pg_upgrade, copy fsm, vm, and extent files by checking for file
existence via open(), rather than collecting a directory listing and
looking up matching relfilenode files with sequential scans of the
array. This speeds up pg_upgrade by 2x for a large number of tables,
e.g. 16k.
Per observation by Ants Aasma.
Diffstat (limited to 'doc/src/sgml/ref')
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