public void endFlush(long start) {
    stats.incInt(flushesInProgressId, -1);
    long end = getTime();
    stats.incLong(flushesId, 1);
    stats.incLong(flushTimeId, end - start);
  }
Invoked after data has been written to disk

@param start The time at which the write operation started
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreStats.java