external/pg_stat_monitor
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PG-186: Add support to monitor query execution plan.

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This commit is contained in:
Ibrar Ahmed
2021-03-17 18:56:39 +05:00
parent aa0ca050d5
commit e0fc683810
18 changed files with 499 additions and 533 deletions
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29
pg_stat_monitor--1.0.sql
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@@ -25,19 +25,20 @@ SELECT string_to_array(get_histogram_timings(), ',');
$$ LANGUAGE SQL;
CREATE FUNCTION pg_stat_monitor_internal(IN showtext boolean,
OUT bucket int, -- 0
OUT bucket int8, -- 0
OUT userid oid,
OUT dbid oid,
OUT client_ip int8,
OUT queryid text, -- 4
OUT planid text,
OUT top_queryid text,
OUT query text,
OUT query_plan text,
OUT state int8,
OUT top_queryid text,
OUT application_name text,
OUT relations text, -- 10
OUT relations text, -- 11
OUT cmd_type int,
OUT elevel int,
OUT sqlcode TEXT,
@@ -57,8 +58,9 @@ CREATE FUNCTION pg_stat_monitor_internal(IN showtext boolean,
OUT plan_min_time float8,
OUT plan_max_time float8,
OUT plan_mean_time float8,
OUT plan_stddev_time float8,
OUT shared_blks_hit int8, -- 28
OUT shared_blks_hit int8, -- 29
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
@@ -70,7 +72,7 @@ CREATE FUNCTION pg_stat_monitor_internal(IN showtext boolean,
OUT temp_blks_written int8,
OUT blk_read_time float8,
OUT blk_write_time float8,
OUT resp_calls text,
OUT resp_calls text, -- 41
OUT cpu_user_time float8,
OUT cpu_sys_time float8,
OUT wal_records int8,
@@ -81,6 +83,19 @@ RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pg_stat_monitor'
LANGUAGE C STRICT VOLATILE PARALLEL SAFE;
CREATE OR REPLACE FUNCTION get_state(state int8) RETURNS TEXT AS
$$
SELECT
CASE
WHEN state = 0 THEN 'PARSED'
WHEN state = 1 THEN 'PLANNING'
WHEN state = 2 THEN 'EXECUTION FINISHED'
WHEN state = 3 THEN 'ERROR'
WHEN state = 4 THEN 'FINISHED'
END
$$
LANGUAGE SQL PARALLEL SAFE;
CREATE or REPLACE FUNCTION get_cmd_type (cmd_type INTEGER) RETURNS TEXT AS
$$
SELECT
@@ -169,7 +184,9 @@ CREATE VIEW pg_stat_monitor AS SELECT
round(cpu_sys_time::numeric, 4) as cpu_sys_time,
wal_records,
wal_fpi,
wal_bytes
wal_bytes,
state,
get_state(state) as state_value
FROM pg_stat_monitor_internal(TRUE) p, pg_database d WHERE dbid = oid
ORDER BY bucket_start_time;