Andres Freund <> writes:
> On 2015-07-19 11:28:25 -0400, Tom Lane wrote:
>> At this point session 1 will go and create page 44, won't it, and you
>> just wasted a page.

> My local code now recognizes that case and uses the page. We just need
> to do an PageIsNew().

Er, what?  How can you tell whether an all-zero page was or was not
just written by another session?

                        regards, tom lane

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