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In COPY, insert tuples to the heap in batches.

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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.
This commit is contained in:
Heikki Linnakangas
2011-11-09 10:54:41 +02:00
parent 2c30f96103
commit d326d9e8ea
6 changed files with 629 additions and 62 deletions
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src/include/pgstat.h
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@ -766,7 +766,7 @@ extern void pgstat_initstats(Relation rel);
(rel)->pgstat_info->t_counts.t_blocks_hit++; \
} while (0)
extern void pgstat_count_heap_insert(Relation rel);
extern void pgstat_count_heap_insert(Relation rel, int n);
extern void pgstat_count_heap_update(Relation rel, bool hot);
extern void pgstat_count_heap_delete(Relation rel);
extern void pgstat_update_heap_dead_tuples(Relation rel, int delta);