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Currently, `UNLISTEN` in connection release is guarded by an expensive PL/pgSQL block, because historically PostgreSQL did not allow `UNLISTEN` on a hot standby node. This has since changed, and `UNLISTEN` is allowed in PostgreSQL 9.4.21+, 9.5.16+, 9.6.12+, 10.7+, 11.2+, and versions 12 and newer. If this change breaks your setup, upgrade your server. The removal of the PL/pgSQL guard reduces the `acquire`/`release` overhead by over 50%. Upstream discussion: https://postgr.es/m/CADT4RqCf2gA_TJtPAjnGzkC3ZiexfBZiLmA-mV66e4UyuVv8bA@mail.gmail.comFixes: #648
fantix
commented
Feb 10, 2021
Member
Shortest-lived PR ever 😆 |
elprans
commented
Feb 10, 2021
MemberAuthor
I didn't realize the work was already done in #648. |
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Currently,
UNLISTENin connection release is guarded by anexpensive PL/pgSQL block, because historically PostgreSQL
did not allow
UNLISTENon a hot standby node. This has sincechanged, and
UNLISTENis allowed in PostgreSQL 9.4.21+, 9.5.16+,9.6.12+, 10.7+, 11.2+, and versions 12 and newer. If this change
breaks your setup, upgrade your server.
The removal of the PL/pgSQL guard reduces the
acquire/releaseoverheadby over 50%.
Upstream discussion: https://postgr.es/m/CADT4RqCf2gA_TJtPAjnGzkC3ZiexfBZiLmA-mV66e4UyuVv8bA@mail.gmail.com
Fixes: #648