Answer: Decreased performance for large, complex queries

The correct answer is C because increasing concurrent users on a Snowflake virtual warehouse leads to decreased performance for large, complex queries. This occurs because the warehouse's compute resources are shared among more users, causing resource contention and longer execution times for resource-intensive queries. The community discussion and Snowflake documentation confirm that multi-cluster warehouses are designed to scale for concurrency, but without such scaling, performance degrades as concurrent load increases. Option A is incorrect because small, simple queries may be less affected but do not see improved performance. Option B is incorrect as large, complex queries suffer from resource sharing. Option D is incorrect because increased concurrency typically leads to higher credit consumption, not decreased.

Author: LeetQuiz Editorial Team