我有一个如下所示的访问日志,它们存储在mongodb实例中:
Time Service Latency
[27/08/2013:11:19:22 +0000] "POST Service A HTTP/1.1" 403
[27/08/2013:11:19:24 +0000] "POST Service B HTTP/1.1" 1022
[27/08/2013:11:22:10 +0000] "POST Service A HTTP/1.1" 455
是否有像Oracle中的PERCENTILE_DISC这样的分析函数来计算百分位数？我想在一段时间内计算出潜伏期百分位数.