On 22 Mar 2018, at 11:37, Howard Chu <hyc@symas.com> wrote:
According to my understanding the memory is dirty when 1)there are open transactions, 2) the data has not been written back to the filesystem
Your understanding is incorrect. Dirty pages remain dirty until they are written to stable storage (e.g., disk). A tmpfs/RAMdisk has no stable storage, all of its pages reside only in RAM. That's the point of a RAMdisk.
Ok, thanks for have it clarified. I was just “hoping” LMDB would have not notice the type of storage was syncing to.