As the number of indexes on a table grows, eventually the aggregate CPU cost of maintaining the indexes can outweigh whatever performance gains a new index might deliver.
随着一个表上的索引数量的增加，维护索引的CPU总成本最终可能会超过新索引提供的性能收益。
As the number of indexes on a table grows, eventually the aggregate CPU cost of maintaining the indexes can outweigh whatever performance gains a new index might deliver.
随着一个表上的索引数量的增加，维护索引的CPU总成本最终可能会超过新索引提供的性能收益。
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