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Re: (ITS#7774) LMDB assertion failure during Postfix cache cleanup

I wrote:
>Wietse Venema writes:
>> I can confirm that with LMDB-0.9.10 + ITS#7756 patch, the assertion
>> failure goes away when I close the cursor (and its read transaction)
>> before changing the map or the database, and restore the cursor
>> afterwards. I guess this got broken when things were changed to use
>> external locks in order to avoid world-writable lockfiles.

Does this mean we can close this ITS?  I made a major typo here:

> Yes.
> Ending the read-only transaction and starting a new one means you are
> no longer seeing the same snapshot, though.  So I hope the reason you
> couldn't use single transaction which I suggested previously, was


> that
> the reader transaction needed to keep seeing the same snapshot.