6f38c43eb1
The function recurses, but didn't perform stack-depth checks. It's
just a debugging aid, so instead of the usual check_stack_depth()
call, stop the printing if we'd risk stack overflow.
Here's an example of how to test this:
(n=1000000; printf "BEGIN;"; for ((i=1;i<=$n;i++)); do printf "SAVEPOINT s$i;"; done; printf "SET log_min_messages = 'DEBUG5'; SAVEPOINT sp;") | psql >/dev/null
In the passing, swap building the list of child XIDs and recursing to
parent. That saves memory while recursing, reducing the risk of out of
memory errors with lots of subtransactions. The saving is not very
significant in practice, but this order seems more logical anyway.
Report by Egor Chindyaskin and Alexander Lakhin.
Discussion: https://www.postgresql.org/message-id/1672760457.940462079%40f306.i.mail.ru
Author: Heikki Linnakangas
Reviewed-by: Robert Haas, Andres Freund, Alexander Korotkov
|
||
|---|---|---|
| config | ||
| contrib | ||
| doc | ||
| src | ||
| .cirrus.star | ||
| .cirrus.tasks.yml | ||
| .cirrus.yml | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| aclocal.m4 | ||
| configure | ||
| configure.ac | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| meson_options.txt | ||
| meson.build | ||
| README.md | ||
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/.