| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [COMMITTERS] pgsql: Move each SLRU's lwlocks to a separate tranche. |
| Date: | 2016-04-05 19:48:22 |
| Message-ID: | CA+TgmobOqZt1FG2YpmvpUoOBRPHL5vjnHy8cay6fs_h1pM-hLw@mail.gmail.com |
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| Lists: | pgsql-committers pgsql-hackers |
On Fri, Mar 25, 2016 at 12:47 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> On Fri, Mar 25, 2016 at 9:48 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>>>> It's stupid that we keep spending time and energy figuring out which
>>>> shared memory data structures require alignment and which ones don't.
>>>> Let's just align them *all* and be done with it. The memory cost
>>>> shouldn't be more than a few kB.
>
>>> I think such a proposal should come with a measurement, not just
>>> speculation about what it costs.
>
>> About 6kB with default settings. See below.
>
> Sold, then.
Excellent. Done.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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