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| author | Andres Freund <andres@anarazel.de> | 2023-04-06 14:18:24 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2023-04-06 16:17:16 -0700 |
| commit | 5279e9db8e8da3c310c0068da2de98df5a714b2e (patch) | |
| tree | e38b8127380623775b00564c38f65029543f5956 /src/backend/access/heap/hio.c | |
| parent | 7d71d3dd080b9b147402db3365fe498f74704231 (diff) | |
| download | postgresql-5279e9db8e8da3c310c0068da2de98df5a714b2e.tar.gz postgresql-5279e9db8e8da3c310c0068da2de98df5a714b2e.zip | |
heapam: Pass number of required pages to RelationGetBufferForTuple()
A future commit will use this information to determine how aggressively to
extend the relation by. In heap_multi_insert() we know accurately how many
pages we need once we need to extend the relation, providing an accurate lower
bound for how much to extend.
Reviewed-by: Melanie Plageman <melanieplageman@gmail.com>
Discussion: https://postgr.es/m/20221029025420.eplyow6k7tgu6he3@awork3.anarazel.de
Diffstat (limited to 'src/backend/access/heap/hio.c')
| -rw-r--r-- | src/backend/access/heap/hio.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/access/heap/hio.c b/src/backend/access/heap/hio.c index a0713c178ac..f24e3d96eb9 100644 --- a/src/backend/access/heap/hio.c +++ b/src/backend/access/heap/hio.c @@ -301,6 +301,11 @@ RelationAddExtraBlocks(Relation relation, BulkInsertState bistate) * Returns pinned and exclusive-locked buffer of a page in given relation * with free space >= given len. * + * If num_pages is > 1, we will try to extend the relation by at least that + * many pages when we decide to extend the relation. This is more efficient + * for callers that know they will need multiple pages + * (e.g. heap_multi_insert()). + * * If otherBuffer is not InvalidBuffer, then it references a previously * pinned buffer of another page in the same relation; on return, this * buffer will also be exclusive-locked. (This case is used by heap_update; @@ -359,7 +364,8 @@ Buffer RelationGetBufferForTuple(Relation relation, Size len, Buffer otherBuffer, int options, BulkInsertState bistate, - Buffer *vmbuffer, Buffer *vmbuffer_other) + Buffer *vmbuffer, Buffer *vmbuffer_other, + int num_pages) { bool use_fsm = !(options & HEAP_INSERT_SKIP_FSM); Buffer buffer = InvalidBuffer; |