@Override
  public long getBytesThreshold() {
    return bytesThreshold;
  }
Returns the number of unwritten bytes of data that can be enqueued before being written to
disk. If this <code>DiskWriteAttributes</code> configures synchronous writing, then
<code>bytesThreshold</code> has no meaning.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskWriteAttributesImpl.java