| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: copy.c allocation constant |
| Date: | 2018-01-24 18:19:19 |
| Message-ID: | CA+TgmobV1U8twJbecfbCxLxggWK3vuJQ_8tutogYDALOOjHMFA@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Wed, Jan 24, 2018 at 12:25 PM, Tomas Vondra
<tomas(dot)vondra(at)2ndquadrant(dot)com> wrote:
> At the glibc level ... I'm not so sure. AFAIK glibc uses an allocator
> with similar ideas (freelists, ...) so hopefully it's fine too.
>
> And then there are the systems without glibc, or with other libc
> implementations. No idea about those.
My guess is that a fairly common pattern for larger chunks will be to
round the size up to a multiple of 4kB, the usual memory page size.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andres Freund | 2018-01-24 18:20:18 | Re: pgsql: Add parallel-aware hash joins. |
| Previous Message | Robert Haas | 2018-01-24 18:11:22 | Re: pgsql: Add parallel-aware hash joins. |