database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-25 13:17:41 +03:00
Code Activity

In COPY, insert tuples to the heap in batches.

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

2
src/include/access/heapam.h
View File

@@ -97,6 +97,8 @@ extern void FreeBulkInsertState(BulkInsertState);
extern Oid heap_insert(Relation relation, HeapTuple tup, CommandId cid,
int options, BulkInsertState bistate);
extern void heap_multi_insert(Relation relation, HeapTuple *tuples, int ntuples,
CommandId cid, int options, BulkInsertState bistate);
extern HTSU_Result heap_delete(Relation relation, ItemPointer tid,
ItemPointer ctid, TransactionId *update_xmax,
CommandId cid, Snapshot crosscheck, bool wait);