xzj7019 commented on code in PR #39175:
URL: https://github.com/apache/doris/pull/39175#discussion_r1716622295
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fe/fe-core/src/main/java/org/apache/doris/nereids/cost/CostModelV1.java:
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@@ -329,14 +329,16 @@ public Cost visitPhysicalHashAggregate(
PhysicalHashAggregate<? extends Plan> aggregate, PlanContext
context) {
Statistics inputStatistics = context.getChildStatistics(0);
double exprCost = expressionTreeCost(aggregate.getExpressions());
+ double aggCostBaseFactor = 3;
Review Comment:
better to measure the influence of this change on ds 10t.
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