In COPY, insert tuples to the heap in batches. This greatly reduces the WAL volume, especially when the table is narrow. The overhead of locking the heap page is also reduced. Reduced WAL traffic also makes it scale a lot better, if you run multiple COPY processes at the same time.
Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/d326d9e8ea1d690cf6d968000efaa5121206d231 Modified Files -------------- src/backend/access/heap/heapam.c | 484 ++++++++++++++++++++++++++++++++++---- src/backend/commands/copy.c | 166 ++++++++++++- src/backend/postmaster/pgstat.c | 6 +- src/include/access/heapam.h | 2 + src/include/access/htup.h | 31 +++ src/include/pgstat.h | 2 +- 6 files changed, 629 insertions(+), 62 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
