1 根据服务、环境选择数据

xxx_total{application="$application", instance="$instance"}

2 同上，支持muti-val（多选）

xxx_total{application="$application", instance=~"$instance"}

3 按xxx_method分类汇总，P95耗时

histogram_quantile(0.95, sum(rate(xxx_bucket{application="$application", instance=~"$instance"}[1m])) by (le, xxx_method))