> I think the problem is that BufferSync unconditionally does PinBuffer
> on each buffer, and holds the pin during intervals where it's released
> BufMgrLock, even if there's not really anything for it to do on that
> buffer.  If someone else is running FlushRelationBuffers then it's
> possible for that routine to see a nonzero pin count when it looks.
> 
> Vadim, what do you think about how to change this?  I think this is
> BufferSync's fault not FlushRelationBuffers's ...

I'm looking there right now...

Vadim

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