public void hintLoad() {
        Pointer pointer = getPointer();

        if (pointer != null) {
            long beginTime = Utils.monotonicMs();
            int ret = LibC.INSTANCE.madvise(pointer, new NativeLong(this.size), LibC.MADV_WILLNEED);
            LOG.info("madvise(MADV_WILLNEED) {} {} {} ret = {} time consuming = {}", pointer, this.path, this.size,
                ret, Utils.monotonicMs() - beginTime);
        }
    }
return true when this segment file is blank that we don't write any data into it.
@return
jraft-core/src/main/java/com/alipay/sofa/jraft/storage/log/SegmentFile.java