public void closeOverflow() {
    for (OverflowOplog oo : overflowMap.values()) {
      oo.destroy();
    }
    synchronized (compactibleOverflowMap) {
      for (OverflowOplog oo : compactibleOverflowMap.values()) {
        oo.destroy();
      }
    }
  }
@param minSize the minimum size this oplog can be
geode-core/src/main/java/org/apache/geode/internal/cache/OverflowOplogSet.java