Re: Creating foreign key on partitioned table is too slow

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: "kato-sho(at)fujitsu(dot)com" <kato-sho(at)fujitsu(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Creating foreign key on partitioned table is too slow
Date: 2019-10-24 18:48:57
Message-ID: 20191024184857.GA14525@alvherre.pgsql
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On 2019-Oct-23, kato-sho(at)fujitsu(dot)com wrote:

> Hello
> To benchmark with tpcb model, I tried to create a foreign key in the partitioned history table, but backend process killed by OOM.
> the number of partitions is 8192. I tried in master(commit: ad4b7aeb84).
> I did the same thing in another server which has 200GB memory, but creating foreign key did not end in 24 hours.

Thanks for reporting. It sounds like there must be a memory leak here.
I am fairly pressed for time at present so I won't be able to
investigate this until, at least, mid November.

Álvaro Herrera
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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