SN-2605 已核对来源，附原文与上下文。
在 rev 153 里试着去掉了 DB_PRIVATE。我们得留意有什么不同。
Trying it without the DB_PRIVATE flag in rev 153. We need to keep an eye on what's different.
至少在 Windows 上，它会创建 __db.001 到 __db.006 六个文件，大小从 24K 到 4MB。退出时不删除它们，就那么留在原地。
On Windows at least, it creates six __db.001 - __db.006 files with sizes from 24K to 4MB. It doesn't delete them on exit, it just leaves them behind.
文档说它使用内存映射文件。我猜它们与数据库文件有同样的文件权限，所以同样的用户访问限制也适用。
The docs say it uses memory mapped files. I assume they have the same file permissions as the database files, so the same user access restrictions apply.
Windows 私有局域网下载 78500 个区块的测试：
Tests on Windows private LAN download of 78500 blocks:
用 DB_PRIVATE 20 分 51 秒
with DB_PRIVATE 20 minutes 51 seconds
不用 DB_PRIVATE 20 分 51 秒
without DB_PRIVATE 20 minutes 51 seconds
我没料到两者会完全一样。
I wasn't expecting them to come out exactly the same.
