| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Josh Berkus <josh(at)agliodbs(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Remove vacuum_defer_cleanup_age |
| Date: | 2016-10-20 14:17:50 |
| Message-ID: | CA+TgmoaTyKQo8w5bOtNDRk1O9WHK2WzYYLbGfu2rdLsJFCGS7w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Oct 19, 2016 at 9:09 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> On Wed, Oct 19, 2016 at 08:17:46PM -0400, Robert Haas wrote:
>> On Wed, Oct 19, 2016 at 12:59 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>> > Uh, vacuum_defer_cleanup_age sets an upper limit on how long, in terms
>> > of xids, that a standby query can run before cancel, like
>> > old_snapshot_threshold, no?
>>
>> No, not really. It affects the behavior of the master, not the standby.
>
> But it controls when/if cancels happen on the standby.
True. I see your point.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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