a92b809f9d
Previously, SIGINT was treated the same as SIGTERM in walwriter and walsummarizer. That decision goes back to when the walwriter process was introduced (commit ad4295728e04), and was later copied to walsummarizer. It was a pretty arbitrary decision back then, and we haven't adopted that convention in all the other processes that have been introduced later. Summary of how other processes respond to SIGINT: - Autovacuum launcher: Cancel the current iteration of launching - bgworker: Ignore (unless connected to a database) - checkpointer: Request shutdown checkpoint - bgwriter: Ignore - pgarch: Ignore - startup process: Ignore - walreceiver: Ignore - IO worker: die() IO workers are a notable exception in that they exit on SIGINT, and there's a documented reason for that: IO workers ignore SIGTERM, so SIGINT provides a way to manually kill them. (They do respond to SIGUSR2, though, like all the other processes that we don't want to exit immediately on SIGTERM on operating system shutdown.) To make this a little more consistent, ignore SIGINT in walwriter and walsummarizer. They have no "query" to cancel, and they react to SIGTERM just fine. Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://www.postgresql.org/message-id/818bafaf-1e77-4c78-8037-d7120878d87c@iki.fi
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.