Re: WAL usage calculation patch

Amit Kapila <amit.kapila16@gmail.com>

From: Amit Kapila <amit.kapila16@gmail.com>

To: Kyotaro Horiguchi <horikyota.ntt@gmail.com>

Cc: Dilip Kumar <dilipbalaut@gmail.com>, Julien Rouhaud <rjuju123@gmail.com>, Kuntal Ghosh <kuntalghosh.2007@gmail.com>, Fujii Masao <masao.fujii@oss.nttdata.com>, Kirill Bychik <kirill.bychik@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>, Thomas Munro <thomas.munro@gmail.com>

Date: 2020-04-03T03:03:53Z

Lists: pgsql-hackers

Commits

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Change the display of WAL usage statistics in Explain.
- 69bfaf2e1de4 13.0 landed
Cosmetic fixups for WAL usage work.
- ef08ca113fe3 13.0 landed
Allow parallel create index to accumulate buffer usage stats.
- 5c71362174eb 13.0 landed
- f179e9f01b65 11.8 landed
- 13823ad3b012 12.3 landed
Allow autovacuum to log WAL usage statistics.
- b7ce6de93b59 13.0 landed
Add the option to report WAL usage in EXPLAIN and auto_explain.
- 33e05f89c53e 13.0 landed
Allow pg_stat_statements to track WAL usage statistics.
- 6b466bf5f2be 13.0 landed
Add infrastructure to track WAL usage.
- df3b181499b4 13.0 landed
Include information on buffer usage during planning phase, in EXPLAIN output, take two.
- ce77abe63cfc 13.0 cited
Include information on buffer usage during planning phase, in EXPLAIN output.
- ed7a5095716e 13.0 cited
Allow parallel vacuum to accumulate buffer usage.
- 3a5e22138a8d 13.0 landed
Allow pg_stat_statements to track planning statistics.
- 17e03282241c 13.0 cited

On Fri, Apr 3, 2020 at 7:15 AM Kyotaro Horiguchi
<horikyota.ntt@gmail.com> wrote:
>
> Hello.
>
> The v13 patch seems failing to apply on the master.
>

It is probably due to recent commit ed7a509571.  I have briefly
studied that and I think we should make this patch account for plan
time WAL usage if any similar to what got committed for buffer usage.
The reason is that there is a possibility that during planning we
might write a WAL due to hint bits.

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