| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Filip Rembiałkowski <filip(dot)rembialkowski(at)gmail(dot)com> |
| Cc: | Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: proposal: make NOTIFY list de-duplication optional |
| Date: | 2016-02-06 00:44:35 |
| Message-ID: | CA+TgmoYiKedu0vUXFQHKpJ1COmT7sNJd2KOLLtXQTQc6Ztgkug@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Feb 5, 2016 at 10:17 AM, Filip Rembiałkowski
<filip(dot)rembialkowski(at)gmail(dot)com> wrote:
> - new GUC in "Statement Behaviour" section, notify_duplicate_removal
> (default true)
>
> Initial discussion in this thread:
> http://www.postgresql.org/message-id/CAP_rwwmpzk9=SbjRZTOd05bDctyC43wNKnu_m37dYGvL4SAeSw@mail.gmail.com
>
> Rationale: for some legitimate use cases, duplicate removal is not required,
> and it gets O(N^2) cost on large COPY/ insert transactions.
I agree with what Merlin said about this:
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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