| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| 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 23:28:38 |
| Message-ID: | 20191024232838.lbqyygqknvefxsas@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2019-10-23 05:59:01 +0000, kato-sho(at)fujitsu(dot)com wrote:
> 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).
Obviously this should be improved. But I think it's also worthwhile to
note that using 8k partitions is very unlikely to be a good choice for
anything. The metadata, partition pruning, etc overhead is just going to
be very substantial.
Greetings,
Andres Freund
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