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pg_stat_statements: Add local_blk_{read|write}_time 

This commit adds to pg_stat_statements the two new fields for local
buffers introduced by 295c36c0c1, adding the time spent to read and
write these blocks.  These are similar to what is done for temp and
shared blocks.  This information available only if track_io_timing is
enabled.

Like for 5a3423ad8e, no version bump is required in the module.

Author: Nazir Bilal Yavuz
Reviewed-by: Robert Haas, Melanie Plageman
Discussion: https://postgr.es/m/CAN55FZ19Ss279mZuqGbuUNxka0iPbLgYuOQXqAKewrjNrp27VA@mail.gmail.com
This commit is contained in:
Michael Paquier 2023-10-19 14:03:31 +09:00
parent 295c36c0c1
commit 5147ab1dd3
4 changed files with 37 additions and 2 deletions
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2
contrib/pg_stat_statements/expected/oldextversions.out
View File

@ -286,6 +286,8 @@ AlTER EXTENSION pg_stat_statements UPDATE TO '1.11';
temp_blks_written | bigint | | |
shared_blk_read_time | double precision | | |
shared_blk_write_time | double precision | | |
local_blk_read_time | double precision | | |
local_blk_write_time | double precision | | |
temp_blk_read_time | double precision | | |
temp_blk_write_time | double precision | | |
wal_records | bigint | | |

2
contrib/pg_stat_statements/pg_stat_statements--1.10--1.11.sql
View File

@ -43,6 +43,8 @@ CREATE FUNCTION pg_stat_statements(IN showtext boolean,
OUT temp_blks_written int8,
OUT shared_blk_read_time float8,
OUT shared_blk_write_time float8,
OUT local_blk_read_time float8,
OUT local_blk_write_time float8,
OUT temp_blk_read_time float8,
OUT temp_blk_write_time float8,
OUT wal_records int8,

15
contrib/pg_stat_statements/pg_stat_statements.c
View File

@ -184,6 +184,10 @@ typedef struct Counters
* in msec */
double shared_blk_write_time; /* time spent writing shared blocks,
* in msec */
double local_blk_read_time; /* time spent reading local blocks, in
* msec */
double local_blk_write_time; /* time spent writing local blocks, in
* msec */
double temp_blk_read_time; /* time spent reading temp blocks, in msec */
double temp_blk_write_time; /* time spent writing temp blocks, in
* msec */
@ -1395,6 +1399,8 @@ pgss_store(const char *query, uint64 queryId,
e->counters.temp_blks_written += bufusage->temp_blks_written;
e->counters.shared_blk_read_time += INSTR_TIME_GET_MILLISEC(bufusage->shared_blk_read_time);
e->counters.shared_blk_write_time += INSTR_TIME_GET_MILLISEC(bufusage->shared_blk_write_time);
e->counters.local_blk_read_time += INSTR_TIME_GET_MILLISEC(bufusage->local_blk_read_time);
e->counters.local_blk_write_time += INSTR_TIME_GET_MILLISEC(bufusage->local_blk_write_time);
e->counters.temp_blk_read_time += INSTR_TIME_GET_MILLISEC(bufusage->temp_blk_read_time);
e->counters.temp_blk_write_time += INSTR_TIME_GET_MILLISEC(bufusage->temp_blk_write_time);
e->counters.usage += USAGE_EXEC(total_time);
@ -1472,8 +1478,8 @@ pg_stat_statements_reset(PG_FUNCTION_ARGS)
#define PG_STAT_STATEMENTS_COLS_V1_8 32
#define PG_STAT_STATEMENTS_COLS_V1_9 33
#define PG_STAT_STATEMENTS_COLS_V1_10 43
#define PG_STAT_STATEMENTS_COLS_V1_11 45
#define PG_STAT_STATEMENTS_COLS 45 /* maximum of above */
#define PG_STAT_STATEMENTS_COLS_V1_11 47
#define PG_STAT_STATEMENTS_COLS 47 /* maximum of above */
/*
* Retrieve statement statistics.
@ -1828,6 +1834,11 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
values[i++] = Float8GetDatumFast(tmp.shared_blk_read_time);
values[i++] = Float8GetDatumFast(tmp.shared_blk_write_time);
}
if (api_version >= PGSS_V1_11)
{
values[i++] = Float8GetDatumFast(tmp.local_blk_read_time);
values[i++] = Float8GetDatumFast(tmp.local_blk_write_time);
}
if (api_version >= PGSS_V1_10)
{
values[i++] = Float8GetDatumFast(tmp.temp_blk_read_time);

20
doc/src/sgml/pgstatstatements.sgml
View File

@ -353,6 +353,26 @@
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>local_blk_read_time</structfield> <type>double precision</type>
</para>
<para>
Total time the statement spent reading local blocks, in milliseconds
(if <xref linkend="guc-track-io-timing"/> is enabled, otherwise zero)
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>local_blk_write_time</structfield> <type>double precision</type>
</para>
<para>
Total time the statement spent writing local blocks, in milliseconds
(if <xref linkend="guc-track-io-timing"/> is enabled, otherwise zero)
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>temp_blk_read_time</structfield> <type>double precision</type>