| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: logical replication syntax (was DROP SUBSCRIPTION, query cancellations and slot handling) |
| Date: | 2017-05-02 15:49:59 |
| Message-ID: | 20170502154959.r45gitdimklbcrwt@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Petr Jelinek wrote:
> So the only way to fulfill the requirement you stated is to just not try
> to drop the slot, ever, on DROP SUBSCRIPTION. That makes the default
> behavior leave resources on upstream that will eventually cause that
> server to stop unless user notices before. I think we better invent
> something that limits how much inactive slots can hold back WAL and
> catalog_xmin in this release as well then.
I don't understand why isn't the default behavior to unconditionally
drop the slot. Why do we ever want the slot to be kept?
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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