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.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/29add0de4920e4f448a30bfc35798b939c211d97
Modified Files
--------------
contrib/pg_upgrade/file.c | 55 ----------
contrib/pg_upgrade/pg_upgrade.h | 2 -
contrib/pg_upgrade/relfilenode.c | 208 +++++++++++++++-----------------------
3 files changed, 82 insertions(+), 183 deletions(-)
