Re: [PROPOSAL] VACUUM Progress Checker.

On Fri, Jul 24, 2015 at 2:00 PM, Jim Nasby <Jim.Nasby@bluetreble.com> wrote:
>> You need to restrict the amount of info, because you've got to
>> preallocate enough shared memory to store all the data that somebody
>> might report.
>
> I was thinking your DSM stuff would come into play here. We wouldn't want to
> be reallocating during execution, but I'd expect we would know during setup
> how much memory we actually needed.

You could make that work, but it would be a pretty significant amount
of new mechanism.  Also, if it's to be practical to report progress
frequently, it's got to be cheap, and that precludes reporting vast
volumes of data.

-- 
Robert Haas
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