成本公式 meaning in Chinese
cost formulas
costs formula
Examples
- To accomplish this , the db2 optimizer applies query cost formulas that evaluate and weigh four factors for each potential access path : the cpu cost , the i o cost , statistical information in the db2 system catalog , and the actual sql statement
要实现这个目标， db2优化器会应用查询成本公式，该公式对每条可能的存取路径的四个因素进行评估和权衡： cpu成本、 i / o成本、 db2系统目录中的统计信息和实际的sql语句。