v9-0001-Sketch.patch
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Filename: v9-0001-Sketch.patch
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Format: format-patch
Series: patch v9-0001
Subject: Sketch
| File | + | − |
|---|---|---|
| src/backend/optimizer/path/costsize.c | 2 | 2 |
From cca6ed05cf8128a1e88ea07021ba21953cbc1a6b Mon Sep 17 00:00:00 2001 From: "Andrei V. Lepikhov" <lepihov@gmail.com> Date: Thu, 31 Jul 2025 14:53:08 +0200 Subject: [PATCH v9 1/2] Sketch --- src/backend/optimizer/path/costsize.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c index 344a3188317..c353001c581 100644 --- a/src/backend/optimizer/path/costsize.c +++ b/src/backend/optimizer/path/costsize.c @@ -512,7 +512,7 @@ cost_gather_merge(GatherMergePath *path, PlannerInfo *root, logN = LOG2(N); /* Assumed cost per tuple comparison */ - comparison_cost = 2.0 * cpu_operator_cost; + comparison_cost = 3.9 * cpu_operator_cost; /* Heap creation cost */ startup_cost += comparison_cost * N * logN; @@ -2474,7 +2474,7 @@ cost_merge_append(Path *path, PlannerInfo *root, logN = LOG2(N); /* Assumed cost per tuple comparison */ - comparison_cost = 2.0 * cpu_operator_cost; + comparison_cost = 3.9 * cpu_operator_cost; /* Heap creation cost */ startup_cost += comparison_cost * N * logN; -- 2.50.1