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Improve bulk-insert performance by keeping the current target buffer pinned

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(but not locked, as that would risk deadlocks).  Also, make it work in a small
ring of buffers to avoid having bulk inserts trash the whole buffer arena.

Robert Haas, after an idea of Simon Riggs'.
This commit is contained in:
Tom Lane
2008-11-06 20:51:15 +00:00
parent cdc197cf31
commit 85e2cedf98
12 changed files with 203 additions and 84 deletions
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5
src/backend/storage/buffer/freelist.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.64 2008/01/01 19:45:51 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.65 2008/11/06 20:51:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -384,6 +384,9 @@ GetAccessStrategy(BufferAccessStrategyType btype)
case BAS_BULKREAD:
ring_size = 256 * 1024 / BLCKSZ;
break;
case BAS_BULKWRITE:
ring_size = 256 * 1024 / BLCKSZ;
break;
case BAS_VACUUM:
ring_size = 256 * 1024 / BLCKSZ;
break;