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Remove io prefix from pg_stat_io columns

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a9c70b46 added the statistics view pg_stat_io which contained columns
"io_context" and "io_object".  Given that the columns are in the
pg_stat_io view, the "io" prefix is somewhat redundant, so remove it.

The code variables referring to these fields are kept unchanged so as
they can keep their context about I/O.

Bump catalog version.

Author: Melanie Plageman
Reviewed-by: Kyotaro Horiguchi, Fabrízio de Royes Mello
Discussion: https://postgr.es/m/CAAKRu_aAQoJWrvT2BYYQvJChFKra_O-5ra3jhzKJZqWsTR1CPQ@mail.gmail.com
This commit is contained in:
Michael Paquier 2023-04-21 07:21:50 +09:00
parent eab2d3147e
commit 0ecb87e1fa
10 changed files with 60 additions and 60 deletions
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4
contrib/amcheck/expected/check_heap.out
View File

@ -80,7 +80,7 @@ INSERT INTO heaptest (a, b)
SET allow_in_place_tablespaces = true; SET allow_in_place_tablespaces = true;
CREATE TABLESPACE regress_test_stats_tblspc LOCATION ''; CREATE TABLESPACE regress_test_stats_tblspc LOCATION '';
SELECT sum(reads) AS stats_bulkreads_before SELECT sum(reads) AS stats_bulkreads_before
FROM pg_stat_io WHERE io_context = 'bulkread' \gset FROM pg_stat_io WHERE context = 'bulkread' \gset
ALTER TABLE heaptest SET TABLESPACE regress_test_stats_tblspc; ALTER TABLE heaptest SET TABLESPACE regress_test_stats_tblspc;
-- Check that valid options are not rejected nor corruption reported -- Check that valid options are not rejected nor corruption reported
-- for a non-empty table -- for a non-empty table
@ -114,7 +114,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(reads) AS stats_bulkreads_after SELECT sum(reads) AS stats_bulkreads_after
FROM pg_stat_io WHERE io_context = 'bulkread' \gset FROM pg_stat_io WHERE context = 'bulkread' \gset
SELECT :stats_bulkreads_after > :stats_bulkreads_before; SELECT :stats_bulkreads_after > :stats_bulkreads_before;
?column? ?column?
---------- ----------

4
contrib/amcheck/sql/check_heap.sql
View File

@ -40,7 +40,7 @@ INSERT INTO heaptest (a, b)
SET allow_in_place_tablespaces = true; SET allow_in_place_tablespaces = true;
CREATE TABLESPACE regress_test_stats_tblspc LOCATION ''; CREATE TABLESPACE regress_test_stats_tblspc LOCATION '';
SELECT sum(reads) AS stats_bulkreads_before SELECT sum(reads) AS stats_bulkreads_before
FROM pg_stat_io WHERE io_context = 'bulkread' \gset FROM pg_stat_io WHERE context = 'bulkread' \gset
ALTER TABLE heaptest SET TABLESPACE regress_test_stats_tblspc; ALTER TABLE heaptest SET TABLESPACE regress_test_stats_tblspc;
-- Check that valid options are not rejected nor corruption reported -- Check that valid options are not rejected nor corruption reported
@ -55,7 +55,7 @@ SELECT * FROM verify_heapam(relation := 'heaptest', startblock := 0, endblock :=
-- causing an additional bulkread, which should be reflected in pg_stat_io. -- causing an additional bulkread, which should be reflected in pg_stat_io.
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(reads) AS stats_bulkreads_after SELECT sum(reads) AS stats_bulkreads_after
FROM pg_stat_io WHERE io_context = 'bulkread' \gset FROM pg_stat_io WHERE context = 'bulkread' \gset
SELECT :stats_bulkreads_after > :stats_bulkreads_before; SELECT :stats_bulkreads_after > :stats_bulkreads_before;
CREATE ROLE regress_heaptest_role; CREATE ROLE regress_heaptest_role;

22
doc/src/sgml/monitoring.sgml
View File

@ -3754,7 +3754,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<row> <row>
<entry role="catalog_table_entry"> <entry role="catalog_table_entry">
<para role="column_definition"> <para role="column_definition">
<structfield>io_object</structfield> <type>text</type> <structfield>object</structfield> <type>text</type>
</para> </para>
<para> <para>
Target object of an I/O operation. Possible values are: Target object of an I/O operation. Possible values are:
@ -3777,7 +3777,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<row> <row>
<entry role="catalog_table_entry"> <entry role="catalog_table_entry">
<para role="column_definition"> <para role="column_definition">
<structfield>io_context</structfield> <type>text</type> <structfield>context</structfield> <type>text</type>
</para> </para>
<para> <para>
The context of an I/O operation. Possible values are: The context of an I/O operation. Possible values are:
@ -3786,10 +3786,10 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<listitem> <listitem>
<para> <para>
<literal>normal</literal>: The default or standard <literal>normal</literal>: The default or standard
<varname>io_context</varname> for a type of I/O operation. For <varname>context</varname> for a type of I/O operation. For
example, by default, relation data is read into and written out from example, by default, relation data is read into and written out from
shared buffers. Thus, reads and writes of relation data to and from shared buffers. Thus, reads and writes of relation data to and from
shared buffers are tracked in <varname>io_context</varname> shared buffers are tracked in <varname>context</varname>
<literal>normal</literal>. <literal>normal</literal>.
</para> </para>
</listitem> </listitem>
@ -3798,7 +3798,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
<literal>vacuum</literal>: I/O operations performed outside of shared <literal>vacuum</literal>: I/O operations performed outside of shared
buffers while vacuuming and analyzing permanent relations. Temporary buffers while vacuuming and analyzing permanent relations. Temporary
table vacuums use the same local buffer pool as other temporary table table vacuums use the same local buffer pool as other temporary table
IO operations and are tracked in <varname>io_context</varname> IO operations and are tracked in <varname>context</varname>
<literal>normal</literal>. <literal>normal</literal>.
</para> </para>
</listitem> </listitem>
@ -3929,9 +3929,9 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
buffer in order to make it available for another use. buffer in order to make it available for another use.
</para> </para>
<para> <para>
In <varname>io_context</varname> <literal>normal</literal>, this counts In <varname>context</varname> <literal>normal</literal>, this counts
the number of times a block was evicted from a buffer and replaced with the number of times a block was evicted from a buffer and replaced with
another block. In <varname>io_context</varname>s another block. In <varname>context</varname>s
<literal>bulkwrite</literal>, <literal>bulkread</literal>, and <literal>bulkwrite</literal>, <literal>bulkread</literal>, and
<literal>vacuum</literal>, this counts the number of times a block was <literal>vacuum</literal>, this counts the number of times a block was
evicted from shared buffers in order to add the shared buffer to a evicted from shared buffers in order to add the shared buffer to a
@ -3949,7 +3949,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
The number of times an existing buffer in a size-limited ring buffer The number of times an existing buffer in a size-limited ring buffer
outside of shared buffers was reused as part of an I/O operation in the outside of shared buffers was reused as part of an I/O operation in the
<literal>bulkread</literal>, <literal>bulkwrite</literal>, or <literal>bulkread</literal>, <literal>bulkwrite</literal>, or
<literal>vacuum</literal> <varname>io_context</varname>s. <literal>vacuum</literal> <varname>context</varname>s.
</para> </para>
</entry> </entry>
</row> </row>
@ -3961,7 +3961,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
</para> </para>
<para> <para>
Number of <literal>fsync</literal> calls. These are only tracked in Number of <literal>fsync</literal> calls. These are only tracked in
<varname>io_context</varname> <literal>normal</literal>. <varname>context</varname> <literal>normal</literal>.
</para> </para>
</entry> </entry>
</row> </row>
@ -3997,7 +3997,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
in some I/O contexts. These rows are omitted from the view. For example, the in some I/O contexts. These rows are omitted from the view. For example, the
checkpointer does not checkpoint temporary tables, so there will be no rows checkpointer does not checkpoint temporary tables, so there will be no rows
for <varname>backend_type</varname> <literal>checkpointer</literal> and for <varname>backend_type</varname> <literal>checkpointer</literal> and
<varname>io_object</varname> <literal>temp relation</literal>. <varname>object</varname> <literal>temp relation</literal>.
</para> </para>
<para> <para>
@ -4005,7 +4005,7 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
backend types or on certain I/O objects and/or in certain I/O contexts. backend types or on certain I/O objects and/or in certain I/O contexts.
These cells will be NULL. For example, temporary tables are not These cells will be NULL. For example, temporary tables are not
<literal>fsync</literal>ed, so <varname>fsyncs</varname> will be NULL for <literal>fsync</literal>ed, so <varname>fsyncs</varname> will be NULL for
<varname>io_object</varname> <literal>temp relation</literal>. Also, the <varname>object</varname> <literal>temp relation</literal>. Also, the
background writer does not perform reads, so <varname>reads</varname> will background writer does not perform reads, so <varname>reads</varname> will
be NULL in rows for <varname>backend_type</varname> <literal>background be NULL in rows for <varname>backend_type</varname> <literal>background
writer</literal>. writer</literal>.

4
src/backend/catalog/system_views.sql
View File

@ -1125,8 +1125,8 @@ CREATE VIEW pg_stat_bgwriter AS
CREATE VIEW pg_stat_io AS CREATE VIEW pg_stat_io AS
SELECT SELECT
b.backend_type, b.backend_type,
b.io_object, b.object,
b.io_context, b.context,
b.reads, b.reads,
b.read_time, b.read_time,
b.writes, b.writes,

8
src/backend/utils/adt/pgstatfuncs.c
View File

@ -1262,8 +1262,8 @@ typedef enum io_stat_col
{ {
IO_COL_INVALID = -1, IO_COL_INVALID = -1,
IO_COL_BACKEND_TYPE, IO_COL_BACKEND_TYPE,
IO_COL_IO_OBJECT, IO_COL_OBJECT,
IO_COL_IO_CONTEXT, IO_COL_CONTEXT,
IO_COL_READS, IO_COL_READS,
IO_COL_READ_TIME, IO_COL_READ_TIME,
IO_COL_WRITES, IO_COL_WRITES,
@ -1394,8 +1394,8 @@ pg_stat_get_io(PG_FUNCTION_ARGS)
continue; continue;
values[IO_COL_BACKEND_TYPE] = bktype_desc; values[IO_COL_BACKEND_TYPE] = bktype_desc;
values[IO_COL_IO_CONTEXT] = CStringGetTextDatum(context_name); values[IO_COL_CONTEXT] = CStringGetTextDatum(context_name);
values[IO_COL_IO_OBJECT] = CStringGetTextDatum(obj_name); values[IO_COL_OBJECT] = CStringGetTextDatum(obj_name);
values[IO_COL_RESET_TIME] = TimestampTzGetDatum(reset_time); values[IO_COL_RESET_TIME] = TimestampTzGetDatum(reset_time);
/* /*

2
src/include/catalog/catversion.h
View File

@ -57,6 +57,6 @@
*/ */
/* yyyymmddN */ /* yyyymmddN */
#define CATALOG_VERSION_NO 202304111 #define CATALOG_VERSION_NO 202304211
#endif #endif

2
src/include/catalog/pg_proc.dat
View File

@ -5762,7 +5762,7 @@
proparallel => 'r', prorettype => 'record', proargtypes => '', proparallel => 'r', prorettype => 'record', proargtypes => '',
proallargtypes => '{text,text,text,int8,float8,int8,float8,int8,float8,int8,int8,int8,int8,int8,float8,timestamptz}', proallargtypes => '{text,text,text,int8,float8,int8,float8,int8,float8,int8,int8,int8,int8,int8,float8,timestamptz}',
proargmodes => '{o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o}', proargmodes => '{o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o}',
proargnames => '{backend_type,io_object,io_context,reads,read_time,writes,write_time,extends,extend_time,op_bytes,hits,evictions,reuses,fsyncs,fsync_time,stats_reset}', proargnames => '{backend_type,object,context,reads,read_time,writes,write_time,extends,extend_time,op_bytes,hits,evictions,reuses,fsyncs,fsync_time,stats_reset}',
prosrc => 'pg_stat_get_io' }, prosrc => 'pg_stat_get_io' },
{ oid => '1136', descr => 'statistics: information about WAL activity', { oid => '1136', descr => 'statistics: information about WAL activity',

6
src/test/regress/expected/rules.out
View File

@ -1881,8 +1881,8 @@ pg_stat_gssapi| SELECT pid,
FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id) FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc, gss_deleg, leader_pid, query_id)
WHERE (client_port IS NOT NULL); WHERE (client_port IS NOT NULL);
pg_stat_io| SELECT backend_type, pg_stat_io| SELECT backend_type,
io_object, object,
io_context, context,
reads, reads,
read_time, read_time,
writes, writes,
@ -1896,7 +1896,7 @@ pg_stat_io| SELECT backend_type,
fsyncs, fsyncs,
fsync_time, fsync_time,
stats_reset stats_reset
FROM pg_stat_get_io() b(backend_type, io_object, io_context, reads, read_time, writes, write_time, extends, extend_time, op_bytes, hits, evictions, reuses, fsyncs, fsync_time, stats_reset); FROM pg_stat_get_io() b(backend_type, object, context, reads, read_time, writes, write_time, extends, extend_time, op_bytes, hits, evictions, reuses, fsyncs, fsync_time, stats_reset);
pg_stat_progress_analyze| SELECT s.pid, pg_stat_progress_analyze| SELECT s.pid,
s.datid, s.datid,
d.datname, d.datname,

34
src/test/regress/expected/stats.out
View File

@ -1137,10 +1137,10 @@ SELECT pg_stat_get_subscription_stats(NULL);
-- Create a regular table and insert some data to generate IOCONTEXT_NORMAL -- Create a regular table and insert some data to generate IOCONTEXT_NORMAL
-- extends. -- extends.
SELECT sum(extends) AS io_sum_shared_before_extends SELECT sum(extends) AS io_sum_shared_before_extends
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs
FROM pg_stat_io FROM pg_stat_io
WHERE io_object = 'relation' \gset io_sum_shared_before_ WHERE object = 'relation' \gset io_sum_shared_before_
CREATE TABLE test_io_shared(a int); CREATE TABLE test_io_shared(a int);
INSERT INTO test_io_shared SELECT i FROM generate_series(1,100)i; INSERT INTO test_io_shared SELECT i FROM generate_series(1,100)i;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
@ -1150,7 +1150,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(extends) AS io_sum_shared_after_extends SELECT sum(extends) AS io_sum_shared_after_extends
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_extends > :io_sum_shared_before_extends; SELECT :io_sum_shared_after_extends > :io_sum_shared_before_extends;
?column? ?column?
---------- ----------
@ -1164,7 +1164,7 @@ CHECKPOINT;
CHECKPOINT; CHECKPOINT;
SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs
FROM pg_stat_io FROM pg_stat_io
WHERE io_object = 'relation' \gset io_sum_shared_after_ WHERE object = 'relation' \gset io_sum_shared_after_
SELECT :io_sum_shared_after_writes > :io_sum_shared_before_writes; SELECT :io_sum_shared_after_writes > :io_sum_shared_before_writes;
?column? ?column?
---------- ----------
@ -1181,13 +1181,13 @@ SELECT current_setting('fsync') = 'off'
-- Change the tablespace so that the table is rewritten directly, then SELECT -- Change the tablespace so that the table is rewritten directly, then SELECT
-- from it to cause it to be read back into shared buffers. -- from it to cause it to be read back into shared buffers.
SELECT sum(reads) AS io_sum_shared_before_reads SELECT sum(reads) AS io_sum_shared_before_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
-- Do this in a transaction to prevent spurious failures due to concurrent accesses to our newly -- Do this in a transaction to prevent spurious failures due to concurrent accesses to our newly
-- rewritten table, e.g. by autovacuum. -- rewritten table, e.g. by autovacuum.
BEGIN; BEGIN;
ALTER TABLE test_io_shared SET TABLESPACE regress_tblspace; ALTER TABLE test_io_shared SET TABLESPACE regress_tblspace;
-- SELECT from the table so that the data is read into shared buffers and -- SELECT from the table so that the data is read into shared buffers and
-- io_context 'normal', io_object 'relation' reads are counted. -- context 'normal', object 'relation' reads are counted.
SELECT COUNT(*) FROM test_io_shared; SELECT COUNT(*) FROM test_io_shared;
count count
------- -------
@ -1202,7 +1202,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(reads) AS io_sum_shared_after_reads SELECT sum(reads) AS io_sum_shared_after_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_reads > :io_sum_shared_before_reads; SELECT :io_sum_shared_after_reads > :io_sum_shared_before_reads;
?column? ?column?
---------- ----------
@ -1210,7 +1210,7 @@ SELECT :io_sum_shared_after_reads > :io_sum_shared_before_reads;
(1 row) (1 row)
SELECT sum(hits) AS io_sum_shared_before_hits SELECT sum(hits) AS io_sum_shared_before_hits
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
-- Select from the table again to count hits. -- Select from the table again to count hits.
-- Ensure we generate hits by forcing a nested loop self-join with no -- Ensure we generate hits by forcing a nested loop self-join with no
-- materialize node. The outer side's buffer will stay pinned, preventing its -- materialize node. The outer side's buffer will stay pinned, preventing its
@ -1243,7 +1243,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(hits) AS io_sum_shared_after_hits SELECT sum(hits) AS io_sum_shared_after_hits
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_hits > :io_sum_shared_before_hits; SELECT :io_sum_shared_after_hits > :io_sum_shared_before_hits;
?column? ?column?
---------- ----------
@ -1264,7 +1264,7 @@ SET temp_buffers TO 100;
CREATE TEMPORARY TABLE test_io_local(a int, b TEXT); CREATE TEMPORARY TABLE test_io_local(a int, b TEXT);
SELECT sum(extends) AS extends, sum(evictions) AS evictions, sum(writes) AS writes SELECT sum(extends) AS extends, sum(evictions) AS evictions, sum(writes) AS writes
FROM pg_stat_io FROM pg_stat_io
WHERE io_context = 'normal' AND io_object = 'temp relation' \gset io_sum_local_before_ WHERE context = 'normal' AND object = 'temp relation' \gset io_sum_local_before_
-- Insert tuples into the temporary table, generating extends in the stats. -- Insert tuples into the temporary table, generating extends in the stats.
-- Insert enough values that we need to reuse and write out dirty local -- Insert enough values that we need to reuse and write out dirty local
-- buffers, generating evictions and writes. -- buffers, generating evictions and writes.
@ -1277,7 +1277,7 @@ SELECT pg_relation_size('test_io_local') / current_setting('block_size')::int8 >
(1 row) (1 row)
SELECT sum(reads) AS io_sum_local_before_reads SELECT sum(reads) AS io_sum_local_before_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'temp relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'temp relation' \gset
-- Read in evicted buffers, generating reads. -- Read in evicted buffers, generating reads.
SELECT COUNT(*) FROM test_io_local; SELECT COUNT(*) FROM test_io_local;
count count
@ -1296,7 +1296,7 @@ SELECT sum(evictions) AS evictions,
sum(writes) AS writes, sum(writes) AS writes,
sum(extends) AS extends sum(extends) AS extends
FROM pg_stat_io FROM pg_stat_io
WHERE io_context = 'normal' AND io_object = 'temp relation' \gset io_sum_local_after_ WHERE context = 'normal' AND object = 'temp relation' \gset io_sum_local_after_
SELECT :io_sum_local_after_evictions > :io_sum_local_before_evictions, SELECT :io_sum_local_after_evictions > :io_sum_local_before_evictions,
:io_sum_local_after_reads > :io_sum_local_before_reads, :io_sum_local_after_reads > :io_sum_local_before_reads,
:io_sum_local_after_writes > :io_sum_local_before_writes, :io_sum_local_after_writes > :io_sum_local_before_writes,
@ -1317,7 +1317,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(writes) AS io_sum_local_new_tblspc_writes SELECT sum(writes) AS io_sum_local_new_tblspc_writes
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'temp relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'temp relation' \gset
SELECT :io_sum_local_new_tblspc_writes > :io_sum_local_after_writes; SELECT :io_sum_local_new_tblspc_writes > :io_sum_local_after_writes;
?column? ?column?
---------- ----------
@ -1335,7 +1335,7 @@ RESET temp_buffers;
-- reads. -- reads.
SET wal_skip_threshold = '1 kB'; SET wal_skip_threshold = '1 kB';
SELECT sum(reuses) AS reuses, sum(reads) AS reads SELECT sum(reuses) AS reuses, sum(reads) AS reads
FROM pg_stat_io WHERE io_context = 'vacuum' \gset io_sum_vac_strategy_before_ FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_before_
CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false'); CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false');
INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i; INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i;
-- Ensure that the next VACUUM will need to perform IO by rewriting the table -- Ensure that the next VACUUM will need to perform IO by rewriting the table
@ -1349,7 +1349,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(reuses) AS reuses, sum(reads) AS reads SELECT sum(reuses) AS reuses, sum(reads) AS reads
FROM pg_stat_io WHERE io_context = 'vacuum' \gset io_sum_vac_strategy_after_ FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_after_
SELECT :io_sum_vac_strategy_after_reads > :io_sum_vac_strategy_before_reads, SELECT :io_sum_vac_strategy_after_reads > :io_sum_vac_strategy_before_reads,
:io_sum_vac_strategy_after_reuses > :io_sum_vac_strategy_before_reuses; :io_sum_vac_strategy_after_reuses > :io_sum_vac_strategy_before_reuses;
?column? | ?column? ?column? | ?column?
@ -1361,7 +1361,7 @@ RESET wal_skip_threshold;
-- Test that extends done by a CTAS, which uses a BAS_BULKWRITE -- Test that extends done by a CTAS, which uses a BAS_BULKWRITE
-- BufferAccessStrategy, are tracked in pg_stat_io. -- BufferAccessStrategy, are tracked in pg_stat_io.
SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_before SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_before
FROM pg_stat_io WHERE io_context = 'bulkwrite' \gset FROM pg_stat_io WHERE context = 'bulkwrite' \gset
CREATE TABLE test_io_bulkwrite_strategy AS SELECT i FROM generate_series(1,100)i; CREATE TABLE test_io_bulkwrite_strategy AS SELECT i FROM generate_series(1,100)i;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
pg_stat_force_next_flush pg_stat_force_next_flush
@ -1370,7 +1370,7 @@ SELECT pg_stat_force_next_flush();
(1 row) (1 row)
SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_after SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_after
FROM pg_stat_io WHERE io_context = 'bulkwrite' \gset FROM pg_stat_io WHERE context = 'bulkwrite' \gset
SELECT :io_sum_bulkwrite_strategy_extends_after > :io_sum_bulkwrite_strategy_extends_before; SELECT :io_sum_bulkwrite_strategy_extends_after > :io_sum_bulkwrite_strategy_extends_before;
?column? ?column?
---------- ----------

34
src/test/regress/sql/stats.sql
View File

@ -549,15 +549,15 @@ SELECT pg_stat_get_subscription_stats(NULL);
-- Create a regular table and insert some data to generate IOCONTEXT_NORMAL -- Create a regular table and insert some data to generate IOCONTEXT_NORMAL
-- extends. -- extends.
SELECT sum(extends) AS io_sum_shared_before_extends SELECT sum(extends) AS io_sum_shared_before_extends
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs
FROM pg_stat_io FROM pg_stat_io
WHERE io_object = 'relation' \gset io_sum_shared_before_ WHERE object = 'relation' \gset io_sum_shared_before_
CREATE TABLE test_io_shared(a int); CREATE TABLE test_io_shared(a int);
INSERT INTO test_io_shared SELECT i FROM generate_series(1,100)i; INSERT INTO test_io_shared SELECT i FROM generate_series(1,100)i;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(extends) AS io_sum_shared_after_extends SELECT sum(extends) AS io_sum_shared_after_extends
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_extends > :io_sum_shared_before_extends; SELECT :io_sum_shared_after_extends > :io_sum_shared_before_extends;
-- After a checkpoint, there should be some additional IOCONTEXT_NORMAL writes -- After a checkpoint, there should be some additional IOCONTEXT_NORMAL writes
@ -567,7 +567,7 @@ CHECKPOINT;
CHECKPOINT; CHECKPOINT;
SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs SELECT sum(writes) AS writes, sum(fsyncs) AS fsyncs
FROM pg_stat_io FROM pg_stat_io
WHERE io_object = 'relation' \gset io_sum_shared_after_ WHERE object = 'relation' \gset io_sum_shared_after_
SELECT :io_sum_shared_after_writes > :io_sum_shared_before_writes; SELECT :io_sum_shared_after_writes > :io_sum_shared_before_writes;
SELECT current_setting('fsync') = 'off' SELECT current_setting('fsync') = 'off'
OR :io_sum_shared_after_fsyncs > :io_sum_shared_before_fsyncs; OR :io_sum_shared_after_fsyncs > :io_sum_shared_before_fsyncs;
@ -575,22 +575,22 @@ SELECT current_setting('fsync') = 'off'
-- Change the tablespace so that the table is rewritten directly, then SELECT -- Change the tablespace so that the table is rewritten directly, then SELECT
-- from it to cause it to be read back into shared buffers. -- from it to cause it to be read back into shared buffers.
SELECT sum(reads) AS io_sum_shared_before_reads SELECT sum(reads) AS io_sum_shared_before_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
-- Do this in a transaction to prevent spurious failures due to concurrent accesses to our newly -- Do this in a transaction to prevent spurious failures due to concurrent accesses to our newly
-- rewritten table, e.g. by autovacuum. -- rewritten table, e.g. by autovacuum.
BEGIN; BEGIN;
ALTER TABLE test_io_shared SET TABLESPACE regress_tblspace; ALTER TABLE test_io_shared SET TABLESPACE regress_tblspace;
-- SELECT from the table so that the data is read into shared buffers and -- SELECT from the table so that the data is read into shared buffers and
-- io_context 'normal', io_object 'relation' reads are counted. -- context 'normal', object 'relation' reads are counted.
SELECT COUNT(*) FROM test_io_shared; SELECT COUNT(*) FROM test_io_shared;
COMMIT; COMMIT;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(reads) AS io_sum_shared_after_reads SELECT sum(reads) AS io_sum_shared_after_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_reads > :io_sum_shared_before_reads; SELECT :io_sum_shared_after_reads > :io_sum_shared_before_reads;
SELECT sum(hits) AS io_sum_shared_before_hits SELECT sum(hits) AS io_sum_shared_before_hits
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
-- Select from the table again to count hits. -- Select from the table again to count hits.
-- Ensure we generate hits by forcing a nested loop self-join with no -- Ensure we generate hits by forcing a nested loop self-join with no
-- materialize node. The outer side's buffer will stay pinned, preventing its -- materialize node. The outer side's buffer will stay pinned, preventing its
@ -604,7 +604,7 @@ SELECT COUNT(*) FROM test_io_shared t1 INNER JOIN test_io_shared t2 USING (a);
COMMIT; COMMIT;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(hits) AS io_sum_shared_after_hits SELECT sum(hits) AS io_sum_shared_after_hits
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'relation' \gset
SELECT :io_sum_shared_after_hits > :io_sum_shared_before_hits; SELECT :io_sum_shared_after_hits > :io_sum_shared_before_hits;
DROP TABLE test_io_shared; DROP TABLE test_io_shared;
@ -623,7 +623,7 @@ SET temp_buffers TO 100;
CREATE TEMPORARY TABLE test_io_local(a int, b TEXT); CREATE TEMPORARY TABLE test_io_local(a int, b TEXT);
SELECT sum(extends) AS extends, sum(evictions) AS evictions, sum(writes) AS writes SELECT sum(extends) AS extends, sum(evictions) AS evictions, sum(writes) AS writes
FROM pg_stat_io FROM pg_stat_io
WHERE io_context = 'normal' AND io_object = 'temp relation' \gset io_sum_local_before_ WHERE context = 'normal' AND object = 'temp relation' \gset io_sum_local_before_
-- Insert tuples into the temporary table, generating extends in the stats. -- Insert tuples into the temporary table, generating extends in the stats.
-- Insert enough values that we need to reuse and write out dirty local -- Insert enough values that we need to reuse and write out dirty local
-- buffers, generating evictions and writes. -- buffers, generating evictions and writes.
@ -632,7 +632,7 @@ INSERT INTO test_io_local SELECT generate_series(1, 5000) as id, repeat('a', 200
SELECT pg_relation_size('test_io_local') / current_setting('block_size')::int8 > 100; SELECT pg_relation_size('test_io_local') / current_setting('block_size')::int8 > 100;
SELECT sum(reads) AS io_sum_local_before_reads SELECT sum(reads) AS io_sum_local_before_reads
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'temp relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'temp relation' \gset
-- Read in evicted buffers, generating reads. -- Read in evicted buffers, generating reads.
SELECT COUNT(*) FROM test_io_local; SELECT COUNT(*) FROM test_io_local;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
@ -641,7 +641,7 @@ SELECT sum(evictions) AS evictions,
sum(writes) AS writes, sum(writes) AS writes,
sum(extends) AS extends sum(extends) AS extends
FROM pg_stat_io FROM pg_stat_io
WHERE io_context = 'normal' AND io_object = 'temp relation' \gset io_sum_local_after_ WHERE context = 'normal' AND object = 'temp relation' \gset io_sum_local_after_
SELECT :io_sum_local_after_evictions > :io_sum_local_before_evictions, SELECT :io_sum_local_after_evictions > :io_sum_local_before_evictions,
:io_sum_local_after_reads > :io_sum_local_before_reads, :io_sum_local_after_reads > :io_sum_local_before_reads,
:io_sum_local_after_writes > :io_sum_local_before_writes, :io_sum_local_after_writes > :io_sum_local_before_writes,
@ -653,7 +653,7 @@ SELECT :io_sum_local_after_evictions > :io_sum_local_before_evictions,
ALTER TABLE test_io_local SET TABLESPACE regress_tblspace; ALTER TABLE test_io_local SET TABLESPACE regress_tblspace;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(writes) AS io_sum_local_new_tblspc_writes SELECT sum(writes) AS io_sum_local_new_tblspc_writes
FROM pg_stat_io WHERE io_context = 'normal' AND io_object = 'temp relation' \gset FROM pg_stat_io WHERE context = 'normal' AND object = 'temp relation' \gset
SELECT :io_sum_local_new_tblspc_writes > :io_sum_local_after_writes; SELECT :io_sum_local_new_tblspc_writes > :io_sum_local_after_writes;
RESET temp_buffers; RESET temp_buffers;
@ -668,7 +668,7 @@ RESET temp_buffers;
-- reads. -- reads.
SET wal_skip_threshold = '1 kB'; SET wal_skip_threshold = '1 kB';
SELECT sum(reuses) AS reuses, sum(reads) AS reads SELECT sum(reuses) AS reuses, sum(reads) AS reads
FROM pg_stat_io WHERE io_context = 'vacuum' \gset io_sum_vac_strategy_before_ FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_before_
CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false'); CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false');
INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i; INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i;
-- Ensure that the next VACUUM will need to perform IO by rewriting the table -- Ensure that the next VACUUM will need to perform IO by rewriting the table
@ -677,7 +677,7 @@ VACUUM (FULL) test_io_vac_strategy;
VACUUM (PARALLEL 0) test_io_vac_strategy; VACUUM (PARALLEL 0) test_io_vac_strategy;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(reuses) AS reuses, sum(reads) AS reads SELECT sum(reuses) AS reuses, sum(reads) AS reads
FROM pg_stat_io WHERE io_context = 'vacuum' \gset io_sum_vac_strategy_after_ FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_after_
SELECT :io_sum_vac_strategy_after_reads > :io_sum_vac_strategy_before_reads, SELECT :io_sum_vac_strategy_after_reads > :io_sum_vac_strategy_before_reads,
:io_sum_vac_strategy_after_reuses > :io_sum_vac_strategy_before_reuses; :io_sum_vac_strategy_after_reuses > :io_sum_vac_strategy_before_reuses;
RESET wal_skip_threshold; RESET wal_skip_threshold;
@ -685,11 +685,11 @@ RESET wal_skip_threshold;
-- Test that extends done by a CTAS, which uses a BAS_BULKWRITE -- Test that extends done by a CTAS, which uses a BAS_BULKWRITE
-- BufferAccessStrategy, are tracked in pg_stat_io. -- BufferAccessStrategy, are tracked in pg_stat_io.
SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_before SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_before
FROM pg_stat_io WHERE io_context = 'bulkwrite' \gset FROM pg_stat_io WHERE context = 'bulkwrite' \gset
CREATE TABLE test_io_bulkwrite_strategy AS SELECT i FROM generate_series(1,100)i; CREATE TABLE test_io_bulkwrite_strategy AS SELECT i FROM generate_series(1,100)i;
SELECT pg_stat_force_next_flush(); SELECT pg_stat_force_next_flush();
SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_after SELECT sum(extends) AS io_sum_bulkwrite_strategy_extends_after
FROM pg_stat_io WHERE io_context = 'bulkwrite' \gset FROM pg_stat_io WHERE context = 'bulkwrite' \gset
SELECT :io_sum_bulkwrite_strategy_extends_after > :io_sum_bulkwrite_strategy_extends_before; SELECT :io_sum_bulkwrite_strategy_extends_after > :io_sum_bulkwrite_strategy_extends_before;
-- Test IO stats reset -- Test IO stats reset