对计算机评价的主要性能指标有时钟频率、( )、运算精度、内存容量等。对数据库管理系统评价的主要性能指标有( )、数据库所允许的索引数量、最大并发事务处理能力等。
问题1选项
A.丢包率
B.端口吞吐量
C.可移植性
D.数据处理速率
问题2选项
A.MIPS
B.支持协议和标准
C.最大连接数
D.时延抖动
正确答案及解析
正确答案
解析
答案: D、C
衡量数据库管理系统的主要性能指标包括数据库本身和管理系统两部分,有:数据库的大小、数据库中表的数量、单个表的大小、表中允许的记录(行)数量、单个记录(行)的大小、表上所允许的索引数量、数据库所允许的索引数量、最大并发事务处理能力、负载均衡能力、最大连接数等等。
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