Fujii Masao <masao.fu...@gmail.com> writes:
> ISTM that writing an invalid-page table to the disk for every restartpoints is
> better approach.

I still say that's uncalled-for overkill.  The invalid-page table is not
necessary for recovery, it's only a debugging cross-check.  You're more
likely to introduce bugs than fix any by adding a mechanism like that.

                        regards, tom lane

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