On 2017-05-29 11:38:20 -0700, Jeff Janes wrote:
> Related, but not the same.  It would be nice if they didn't block, but if
> they do have to block, shouldn't it wait on a semaphore, rather than doing
> a tight loop?  It looks like maybe a latch didn't get reset when it should
> have or something.

The code certainly is trying to just block using a lock (on the xid of
the running xact), there shouldn't be any busy looping going on...
There's no latch involved, so something is certainly weird here.

- Andres

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