Re: Reindex doesn't eliminate bloat

On 03/12/2018 10:48 PM, Nikolay Samokhvalov wrote:
> On Tue, Mar 13, 2018 at 1:28 AM, Ron Johnson <ron.l.johnson@cox.net 
> <mailto:ron.l.johnson@cox.net>> wrote:
>
>     On 03/12/2018 05:20 PM, Nikolay Samokhvalov wrote:
>>     On Tue, Mar 13, 2018 at 1:05 AM, Ron Johnson <ron.l.johnson@cox.net
>>     <mailto:ron.l.johnson@cox.net>> wrote:
>>
>>         v8.4.12
>>
>>     This is *very* old version, not supported by the community for many
>>     years. Check https://www.postgresql.org/ to seecurrentlysupported
>>     versions.
>>     You need to upgrade it.
>
>     Don't even think I'm in control of when -- or even if -- the customer
>     decides to upgrade.
>
>     That being the case, do you have an answer to the question?
>
>
> Those queries from wiki for table and index bloat estimation are for 
> estimation only. In many cases they show very wrong results. Better (yet 
> not ideal) approach is using pgstattuple extension (though I'm not sure it 
> existed back in 2009).
>
> Can you provide table and index definition and, if you can, some sample data?

Sadly, no sample data.  (It's all PCI controlled.)

Index idx_item_mapping_rp7_y2016m03itemmapping_custom_userfield_801 has 40% 
bloat.

Thanks.

-- 
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