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aio: Add pg_aios view

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The new view lists all IO handles that are currently in use and is mainly
useful for PG developers, but may also be useful when tuning PG.

Bumps catversion.

Reviewed-by: Noah Misch <noah@leadboat.com>
Discussion: https://postgr.es/m/uvrtrknj4kdytuboidbhwclo4gxhswwcpgadptsjvjqcluzmah%40brqs62irg4dt
This commit is contained in:
Andres Freund
2025-04-01 13:30:33 -04:00
parent 46250cdcb0
commit 60f566b4f2
10 changed files with 580 additions and 1 deletions
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18
src/test/regress/expected/privileges.out
View File

@@ -3132,6 +3132,12 @@ DROP USER regress_locktable_user;
-- switch to superuser
\c -
CREATE ROLE regress_readallstats;
SELECT has_table_privilege('regress_readallstats','pg_aios','SELECT'); -- no
has_table_privilege
---------------------
f
(1 row)
SELECT has_table_privilege('regress_readallstats','pg_backend_memory_contexts','SELECT'); -- no
has_table_privilege
---------------------
@@ -3145,6 +3151,12 @@ SELECT has_table_privilege('regress_readallstats','pg_shmem_allocations','SELECT
(1 row)
GRANT pg_read_all_stats TO regress_readallstats;
SELECT has_table_privilege('regress_readallstats','pg_aios','SELECT'); -- yes
has_table_privilege
---------------------
t
(1 row)
SELECT has_table_privilege('regress_readallstats','pg_backend_memory_contexts','SELECT'); -- yes
has_table_privilege
---------------------
@@ -3159,6 +3171,12 @@ SELECT has_table_privilege('regress_readallstats','pg_shmem_allocations','SELECT
-- run query to ensure that functions within views can be executed
SET ROLE regress_readallstats;
SELECT COUNT(*) >= 0 AS ok FROM pg_aios;
ok
----
t
(1 row)
SELECT COUNT(*) >= 0 AS ok FROM pg_backend_memory_contexts;
ok
----

16
src/test/regress/expected/rules.out
View File

@@ -1286,6 +1286,22 @@ drop table cchild;
SELECT viewname, definition FROM pg_views
WHERE schemaname = 'pg_catalog'
ORDER BY viewname;
pg_aios| SELECT pid,
io_id,
io_generation,
state,
operation,
off,
length,
target,
handle_data_len,
raw_result,
result,
target_desc,
f_sync,
f_localmem,
f_buffered
FROM pg_get_aios() pg_get_aios(pid, io_id, io_generation, state, operation, off, length, target, handle_data_len, raw_result, result, target_desc, f_sync, f_localmem, f_buffered);
pg_available_extension_versions| SELECT e.name,
e.version,
(x.extname IS NOT NULL) AS installed,

3
src/test/regress/sql/privileges.sql
View File

@@ -1919,16 +1919,19 @@ DROP USER regress_locktable_user;
CREATE ROLE regress_readallstats;
SELECT has_table_privilege('regress_readallstats','pg_aios','SELECT'); -- no
SELECT has_table_privilege('regress_readallstats','pg_backend_memory_contexts','SELECT'); -- no
SELECT has_table_privilege('regress_readallstats','pg_shmem_allocations','SELECT'); -- no
GRANT pg_read_all_stats TO regress_readallstats;
SELECT has_table_privilege('regress_readallstats','pg_aios','SELECT'); -- yes
SELECT has_table_privilege('regress_readallstats','pg_backend_memory_contexts','SELECT'); -- yes
SELECT has_table_privilege('regress_readallstats','pg_shmem_allocations','SELECT'); -- yes
-- run query to ensure that functions within views can be executed
SET ROLE regress_readallstats;
SELECT COUNT(*) >= 0 AS ok FROM pg_aios;
SELECT COUNT(*) >= 0 AS ok FROM pg_backend_memory_contexts;
SELECT COUNT(*) >= 0 AS ok FROM pg_shmem_allocations;
RESET ROLE;