| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| 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: | 2016-03-25 16:47:02 |
| Message-ID: | 14166.1458924422@sss.pgh.pa.us |
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| Lists: | pgsql-committers pgsql-hackers |
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.
regards, tom lane
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