| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Greg Smith <greg(at)2ndquadrant(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: tuplesort memory usage: grow_memtuples |
| Date: | 2012-06-26 21:06:47 |
| Message-ID: | CA+TgmobDaO2-7OdifL_F0Byh_bXywNiomVGwY8e=f-5Y-TrQEQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Mar 3, 2012 at 3:22 PM, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
> When sorting small tuples, the memtuples array can use a substantial
> fraction of the total per-tuple memory used. (In the case of pass by
> value, it is all of it)
>
> The way it grows leads to sub-optimal memory usage.
Greg, I see you signed up to review this on the 14th, but I don't see
a review yet. Are you planning to post one soon?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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