Re: FULL_PAGE_WRITES

what's the table and index look like? how do you test? Is it HOT update?
For update table and index ,you can read this:
http://www.dbrnd.com/2016/12/postgresql-increase-the-speed-of-update-query-using-hot-update-heap-only-tuple-mvcc-fill-factor-vacuum-fragmentation/

2017年6月13日 1:06 PM，"Potukanuma, Vishnu" <vishnusp(at)amazon(dot)com>写道：

>
>
> Hi,
>
>
>
> I am new to postgres, I have a simple question.
>
> When this parameter FULL_PAGE_WRITES is set to ON, it writes the FULL
> pages to WAL, does it write just the data pages or both the index pages as
> well.
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> I tried running update statement on the table which updates the same
> number of rows with and without the index, the WAL size is the same.
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>
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> Thanks,
>
> Vishnu
>