Hmmm... You have a point. I have to say though that the read-write mode was not part of LMDB&#x27;s original design; it was added in response to a request from a RedHat engineer. So in its purest original form, LMDB was completely incorruptible.<p>In practice we&#x27;ve also found that writable mmap is only a win when your entire DB resides in RAM. When the DB is larger than RAM it&#x27;s actually slower than just using write(). (When you try to write to an mmap page, if it&#x27;s not already resident the OS must page it in. This is a wasted page-in since we&#x27;re simply going to overwrite the entire page.)