mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-27 08:39:28 +08:00
f57791985a
The new column shows how many backends have a buffer pinned. That can be useful during development or to diagnose production issues e.g. caused by vacuum waiting for cleanup locks. To handle upgrades transparently - the extension might be used in views - deal with callers expecting the old number of columns. Reviewed by Fujii Masao and Rajeev rastogi.
12 lines
508 B
SQL
12 lines
508 B
SQL
/* contrib/pg_buffercache/pg_buffercache--1.0--1.1.sql */
|
|
|
|
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
|
|
\echo Use "ALTER EXTENSION pg_buffercache UPDATE TO '1.1'" to load this file. \quit
|
|
|
|
-- Upgrade view to 1.1. format
|
|
CREATE OR REPLACE VIEW pg_buffercache AS
|
|
SELECT P.* FROM pg_buffercache_pages() AS P
|
|
(bufferid integer, relfilenode oid, reltablespace oid, reldatabase oid,
|
|
relforknumber int2, relblocknumber int8, isdirty bool, usagecount int2,
|
|
pinning_backends int4);
|