| From: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] Moving relation extension locks out of heavyweight lock manager |
| Date: | 2018-04-11 01:08:04 |
| Message-ID: | CAD21AoBvkGiqWUBi5g_7eDixUXDJ6t7u-7gnV1Qqn4cu-9aFsQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Apr 11, 2018 at 1:40 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Tue, Apr 10, 2018 at 5:40 AM, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>> The probability of performance degradation can be reduced by
>> increasing N_RELEXTLOCK_ENTS. But as Robert mentioned, while keeping
>> fast and simple implementation like acquiring lock by a few atomic
>> operation it's hard to improve or at least keep the current
>> performance on all cases. I was thinking that this patch is necessary
>> by parallel DML operations and vacuum but if the community cannot
>> accept this approach it might be better to mark it as "Rejected" and
>> then I should reconsider the design of parallel vacuum.
>
> I'm sorry that I didn't get time to work further on this during the
> CommitFest.
Never mind. There was a lot of items especially at the last CommitFest.
> In terms of moving forward, I'd still like to hear what
> Andres has to say about the comments I made on March 1st.
Yeah, agreed.
Regards,
--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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