Kevin Grittner wrote:
I don't think Vlad is being unreasonable here; he's provided a
test case demonstrating the behavior he'd like to see, and shown
it doesn't work as expected.
... on a toy table with contrived values. How different is this
from the often-asked question about why a query against a four-line
table is not using the index they expect, and how can we expect it
to scale if it doesn't?
It's not, but in that case I've been known to show someone that the
behavior they're seeing doesn't happen on a larger table. My point was
just that no one has really done that here yet: provided an example
showing SSI serialization working as a substitute for predicate locking
in this sort of use case. I trust that the theory is sound here, and
yet I'd still like to see that demonstrated. This is why I launched
into making a less trivial test case.
--
Greg Smith 2ndQuadrant US g...@2ndquadrant.com Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us
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