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39eabec904
Commit 074251db added an assertion that verified the fastpath/rightmost
page insert optimization's assumption about free space: There should
always be enough free space on the page to insert the new item without
splitting the page. Otherwise, we end up using the "concurrent root
page split" phony/fake stack path in _bt_insert_parent(). This does not
lead to incorrect behavior, but it is likely to be far slower than
simply using the regular _bt_search() path. The assertion catches
serious performance bugs that would probably take a long time to detect
any other way.
It seems much more natural to make this assertion just before the point
that we generate a fake/phony descent stack. Move the assert there.
This also makes _bt_insertonpg() a bit more readable.
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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.