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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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6
src/backend/postmaster/pgstat.c
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@@ -1677,10 +1677,10 @@ add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
}
/*
* pgstat_count_heap_insert - count a tuple insertion
* pgstat_count_heap_insert - count a tuple insertion of n tuples
*/
void
pgstat_count_heap_insert(Relation rel)
pgstat_count_heap_insert(Relation rel, int n)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
@@ -1693,7 +1693,7 @@ pgstat_count_heap_insert(Relation rel)
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
pgstat_info->trans->tuples_inserted++;
pgstat_info->trans->tuples_inserted += n;
}
}