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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2017-08-16 16:18:41 +0300 |
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| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2017-08-16 16:18:41 +0300 |
| commit | 3cda10f41bfed7e34b0db7013b66dd40a5f75926 (patch) | |
| tree | 4ff54d4f5050da1b2b5b58dc277716b93f21d9be /contrib/postgres_fdw/postgres_fdw.c | |
| parent | 0c504a80cf2e6f66df2cdea563e879bf4abd1629 (diff) | |
| download | postgresql-3cda10f41bfed7e34b0db7013b66dd40a5f75926.tar.gz postgresql-3cda10f41bfed7e34b0db7013b66dd40a5f75926.zip | |
Use atomic ops to hand out pages to scan in parallel scan.
With a lot of CPUs, the spinlock that protects the current scan location
in a parallel scan can become a bottleneck. Use an atomic fetch-and-add
instruction instead.
David Rowley
Discussion: https://www.postgresql.org/message-id/CAKJS1f9tgsPhqBcoPjv9_KUPZvTLCZ4jy%3DB%3DbhqgaKn7cYzm-w@mail.gmail.com
Diffstat (limited to 'contrib/postgres_fdw/postgres_fdw.c')
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