Simon Riggs <> writes:
> On 7 September 2016 at 13:47, Fujii Masao <> wrote:
>> On Tue, Sep 6, 2016 at 11:41 PM, Simon Riggs <> wrote:
>>> lazy_truncate_heap() was waiting for
>>> not milliseconds as originally intended.

>> Don't we need to back-patch this?

> If we do then a database-wide VACUUM on a busy database will take
> substantially longer than it does now.

On the other hand, it's also more likely to successfully perform desired

> That may not be perceived as a "fix" by everybody, so we should not do
> it without an explicit agreement by many.

Agreed, but I vote with Fujii-san for back-patching.

                        regards, tom lane

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