| From: | Elvis Pranskevichus <elprans(at)gmail(dot)com> |
|---|---|
| To: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | [PATCH v1] Add and report the new "in_hot_standby" GUC pseudo-variable. |
| Date: | 2017-03-17 17:56:00 |
| Message-ID: | 1700970.cRWpxnom9y@hammer.magicstack.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi,
Currently, clients wishing to know when the server exits hot standby
have to resort to polling, which is often suboptimal.
This adds the new "in_hot_standby" GUC variable that is reported via a
ParameterStatus message. This allows the clients to:
(a) know right away that they are connected to a server in hot
standby; and
(b) know immediately when a server exits hot standby.
This change will be most beneficial to various connection pooling
systems (pgpool etc.)
Elvis
| Attachment | Content-Type | Size |
|---|---|---|
| v1-0001-Add-and-report-the-new-in_hot_standby-GUC-pseudo-.patch | text/x-patch | 13.9 KB |
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