| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Tomas Vondra <tv(at)fuzzy(dot)cz>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Poor memory context performance in large hash joins |
| Date: | 2017-02-24 07:00:27 |
| Message-ID: | CAEepm=24pdL0eVZmjZtBCLeHugHBisADht2TjaEdCB_aFv16ZQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Feb 24, 2017 at 12:17 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> Jeff, do you have a handy demonstrator?
If you want to hit ExecHashIncreaseNumBatches a bunch of times, see
the "ugly" example in the attached.
--
Thomas Munro
http://www.enterprisedb.com
| Attachment | Content-Type | Size |
|---|---|---|
| hj-test-queries.sql | application/octet-stream | 2.9 KB |
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