Date: Wed, 24 Oct 2018 03:37:48 -0500
From: Bruno Wolff III <bruno@wolff.to>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-general@lists.postgresql.org
Subject: Re: Should pg 11 use a lot more memory building an spgist index?
Message-ID: <20181024083748.GA3296@wolff.to>
Mail-Followup-To: Bruno Wolff III <bruno@wolff.to>,
	Tom Lane <tgl@sss.pgh.pa.us>, pgsql-general@lists.postgresql.org
References: <20181024012314.GA27428@wolff.to>
 <19003.1540370028@sss.pgh.pa.us>
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On Wed, Oct 24, 2018 at 09:33:48 +0100,
  Tom Lane <tgl@sss.pgh.pa.us> wrote:
>Bruno Wolff III <bruno@wolff.to> writes:
>> While reloading a database cluster to move from 10.5 to 11, I'm getting
>> out of memory crashes that I did see when doing reloads on pg 10.
>> The statement flagged in the log is this:
>> 2018-10-23 16:44:34.815 CDT [126839] STATEMENT:  ALTER TABLE ONLY public.iplocation
>> 	    ADD CONSTRAINT overlap EXCLUDE USING spgist (network WITH &&);
>
>Hm, there's a fair amount of new code in SP-GIST in v11, so maybe you've
>hit a memory leak in that.  Can you create a self-contained test case?

I'll try. I think I should only need the geolite data to cause the problem 
and I can share that publicly. So far the problem seems to be happening 
consistently. I'll work on this at the office, but probably won't get it 
done until the afternoon.

If I have a substantial database dump file to provide for reproducing this 
do you prefer it on a web server somewhere? I expect that mailing very 
large attachments to the lists is a bad idea.