I&#x27;m surprised it&#x27;s not the default. I agree it should be. I wonder why it&#x27;s not... There must be some good reason?
This page verifies that what you&#x27;re saying is actually correct-
<a href="http:&#x2F;&#x2F;pybsddb.sourceforge.net&#x2F;ref&#x2F;env&#x2F;region.html" rel="nofollow">http:&#x2F;&#x2F;pybsddb.sourceforge.net&#x2F;ref&#x2F;env&#x2F;region.html</a><p>Update: Architecture dependence and having to release shared memory after a crash, are two possible reasons BDB defaults to mmap rather than shared memory.