Use configurable WAL flush inteval
Use configurable WAL flush inteval

prometheus/prometheus,alileza/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,Gouthamve/prometheus,kangwoo/prometheus,kangwoo/prometheus,alileza/prometheus,keegancsmith/prometheus,Gouthamve/tsdb,alileza/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,prometheus/tsdb,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,kangwoo/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,prometheus/prometheus,alileza/prometheus,prometheus/prometheus