The comments say it's possible to reuse read only transactions but says nothing about reusing the read write transactions.  Does this mean every write operation needs a fresh transaction? Is there any downsides to not implementing the reuse functions for the wrapper? I figure the use case is quite limited and frankly I would have to manage all the transaction pointers to make sure they were being used property. 

Also I noticed that every call to mdb_txn_id returns 1 even for different transactions.  Is this normal?

Thanks.