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pg_stat_statements: Track I/O timing for temporary file blocks
This commit adds two new columns to pg_stat_statements, called
temp_blk_read_time and temp_blk_write_time. Those columns respectively
show the time spent to read and write temporary file blocks on disk,
whose tracking has been added in efb0ef9. This information is
available when track_io_timing is enabled, like blk_read_time and
blk_write_time.
pg_stat_statements is updated to version to 1.10 as an effect of the
newly-added columns. Tests for the upgrade path 1.9->1.10 are added.
PGSS_FILE_HEADER is bumped for the new stats file format.
Author: Masahiko Sawada
Reviewed-by: Georgios Kokolatos, Melanie Plageman, Julien Rouhaud,
Ranier Vilela
Discussion: https://postgr.es/m/CAD21AoAJgotTeP83p6HiAGDhs_9Fw9pZ2J=_tYTsiO5Ob-V5GQ@mail.gmail.com
This commit is contained in:
Michael Paquier
@ -136,4 +136,110 @@ SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
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(1 row)
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-- New function pg_stat_statement_info, and new function
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-- and view for pg_stat_statements introduced in 1.9
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.9';
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SELECT pg_get_functiondef('pg_stat_statements_info'::regproc);
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pg_get_functiondef
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-------------------------------------------------------------------------------------------------------------------------
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CREATE OR REPLACE FUNCTION public.pg_stat_statements_info(OUT dealloc bigint, OUT stats_reset timestamp with time zone)+
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RETURNS record +
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LANGUAGE c +
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PARALLEL SAFE STRICT +
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AS '$libdir/pg_stat_statements', $function$pg_stat_statements_info$function$ +
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(1 row)
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\d pg_stat_statements
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View "public.pg_stat_statements"
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Column | Type | Collation | Nullable | Default
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---------------------+------------------+-----------+----------+---------
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userid | oid | | |
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dbid | oid | | |
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toplevel | boolean | | |
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queryid | bigint | | |
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query | text | | |
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plans | bigint | | |
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total_plan_time | double precision | | |
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min_plan_time | double precision | | |
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max_plan_time | double precision | | |
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mean_plan_time | double precision | | |
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stddev_plan_time | double precision | | |
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calls | bigint | | |
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total_exec_time | double precision | | |
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min_exec_time | double precision | | |
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max_exec_time | double precision | | |
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mean_exec_time | double precision | | |
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stddev_exec_time | double precision | | |
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rows | bigint | | |
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shared_blks_hit | bigint | | |
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shared_blks_read | bigint | | |
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shared_blks_dirtied | bigint | | |
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shared_blks_written | bigint | | |
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local_blks_hit | bigint | | |
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local_blks_read | bigint | | |
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local_blks_dirtied | bigint | | |
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local_blks_written | bigint | | |
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temp_blks_read | bigint | | |
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temp_blks_written | bigint | | |
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blk_read_time | double precision | | |
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blk_write_time | double precision | | |
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wal_records | bigint | | |
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wal_fpi | bigint | | |
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wal_bytes | numeric | | |
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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has_data
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----------
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t
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(1 row)
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-- New functions and views for pg_stat_statements in 1.10
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.10';
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\d pg_stat_statements
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View "public.pg_stat_statements"
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Column | Type | Collation | Nullable | Default
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---------------------+------------------+-----------+----------+---------
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userid | oid | | |
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dbid | oid | | |
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toplevel | boolean | | |
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queryid | bigint | | |
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query | text | | |
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plans | bigint | | |
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total_plan_time | double precision | | |
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min_plan_time | double precision | | |
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max_plan_time | double precision | | |
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mean_plan_time | double precision | | |
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stddev_plan_time | double precision | | |
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calls | bigint | | |
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total_exec_time | double precision | | |
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min_exec_time | double precision | | |
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max_exec_time | double precision | | |
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mean_exec_time | double precision | | |
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stddev_exec_time | double precision | | |
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rows | bigint | | |
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shared_blks_hit | bigint | | |
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shared_blks_read | bigint | | |
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shared_blks_dirtied | bigint | | |
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shared_blks_written | bigint | | |
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local_blks_hit | bigint | | |
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local_blks_read | bigint | | |
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local_blks_dirtied | bigint | | |
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local_blks_written | bigint | | |
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temp_blks_read | bigint | | |
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temp_blks_written | bigint | | |
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blk_read_time | double precision | | |
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blk_write_time | double precision | | |
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temp_blk_read_time | double precision | | |
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temp_blk_write_time | double precision | | |
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wal_records | bigint | | |
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wal_fpi | bigint | | |
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wal_bytes | numeric | | |
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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has_data
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----------
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t
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(1 row)
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DROP EXTENSION pg_stat_statements;
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