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logtape.c: do not preallocate for tapes when sorting

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The preallocation logic is only useful for HashAgg, so disable it when
sorting.

Also, adjust an out-of-date comment.

Reviewed-by: Peter Geoghegan
Discussion: https://postgr.es/m/CAH2-Wzn_o7tE2+hRVvwSFghRb75AJ5g-nqGzDUqLYMexjOAe=g@mail.gmail.com
Backpatch-through: 13
This commit is contained in:
Jeff Davis
2020-09-11 17:10:02 -07:00
parent aeb781107a
commit 93106d71a1
4 changed files with 32 additions and 18 deletions
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2
src/backend/executor/nodeAgg.c
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@ -2882,7 +2882,7 @@ hashagg_tapeinfo_init(AggState *aggstate)
HashTapeInfo *tapeinfo = palloc(sizeof(HashTapeInfo));
int init_tapes = 16; /* expanded dynamically */
tapeinfo->tapeset = LogicalTapeSetCreate(init_tapes, NULL, NULL, -1);
tapeinfo->tapeset = LogicalTapeSetCreate(init_tapes, true, NULL, NULL, -1);
tapeinfo->ntapes = init_tapes;
tapeinfo->nfreetapes = init_tapes;
tapeinfo->freetapes_alloc = init_tapes;