d6d8054dc7
For AIO on temporary table buffers the AIO subsystem needs to be able to ensure a pin on a buffer while AIO is going on, even if the IO issuing query errors out. Tracking the buffer in LocalRefCount does not work, as it would cause CheckForLocalBufferLeaks() to assert out. Instead, also track the refcount in BufferDesc.state, not just LocalRefCount. This also makes local buffers behave a bit more akin to shared buffers. Note that we still don't need locking, AIO completion callbacks for local buffers are executed in the issuing session (i.e. nobody else has access to the BufferDesc). Reviewed-by: Noah Misch <noah@leadboat.com> Discussion: https://postgr.es/m/uvrtrknj4kdytuboidbhwclo4gxhswwcpgadptsjvjqcluzmah%40brqs62irg4dt |
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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/.