Re: [HACKERS] GUC for cleanup indexes threshold.

On Sat, Feb 25, 2017 at 3:40 AM, Peter Geoghegan <pg@bowt.ie> wrote:
> On Fri, Feb 24, 2017 at 9:26 AM, Robert Haas <robertmhaas@gmail.com> wrote:
>> I think this thread is pretty short on evidence that would let us make
>> a smart decision about what to do here.  I see three possibilities.
>> The first is that this patch is a good idea whether we do something
>> about the issue of half-dead pages or not.  The second is that this
>> patch is a good idea if we do something about the issue of half-dead
>> pages but a bad idea if we don't.  The third is that this patch is a
>> bad idea whether or not we do anything about the issue of half-dead
>> pages.
>

+1.  I think we can track the stats from
IndexBulkDeleteResult->pages_free to see the impact of the patch.


> Half-dead pages are not really relevant to this discussion, AFAICT. I
> think that both you and Simon mean "recyclable" pages.
>

Yes, I think so and I think that is just confusion about terminology.


-- 
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com