90%的响应时间理解 官方解释:90% Line - 90% of the samples took no more than this time. The remaining samples at least as long as this. 有10个数: 1.2.3.4.5.6.7.8.9.10 按由大到小将其排列. 求它的第90%百分位,也就是第9个数刚好是9 ,那么他的90%Line 就是9 一组数由小到大进行排列,找到他的第90%个数(假如是12),那么这个数组中有90%的数将小于等于