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

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This requires refactoring of code to add this functionality. Along with
that this patch contains regression test cases.
This commit is contained in:
Ibrar Ahmed
2021-03-12 18:55:12 +00:00
parent 8f69daa5dd
commit 066162c3f6
34 changed files with 10234 additions and 1173 deletions
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51
pg_stat_monitor--1.0.sql
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@@ -24,32 +24,27 @@ RETURNS text[] AS $$
SELECT string_to_array(get_histogram_timings(), ',');
$$ LANGUAGE SQL;
CREATE FUNCTION pg_stat_monitor(IN showtext boolean,
OUT bucket int,
CREATE FUNCTION pg_stat_monitor_internal(IN showtext boolean,
OUT bucket int, -- 0
OUT userid oid,
OUT dbid oid,
OUT client_ip int8,
OUT queryid text,
OUT top_queryid text,
OUT queryid text, -- 4
OUT planid text,
OUT top_queryid text,
OUT query text,
OUT query_plan text,
OUT application_name text,
OUT relations text,
OUT relations text, -- 10
OUT cmd_type int,
OUT elevel int,
OUT sqlcode TEXT,
OUT message text,
OUT bucket_start_time text,
OUT plans int8,
OUT plan_total_time float8,
OUT plan_min_time float8,
OUT plan_max_time float8,
OUT plan_mean_time float8,
OUT plan_stddev_time float8,
OUT plan_rows int8,
OUT calls int8,
OUT calls int8, -- 16
OUT total_time float8,
OUT min_time float8,
OUT max_time float8,
@@ -57,7 +52,13 @@ CREATE FUNCTION pg_stat_monitor(IN showtext boolean,
OUT stddev_time float8,
OUT rows int8,
OUT shared_blks_hit int8,
OUT plans_calls int8, -- 23
OUT plan_total_time float8,
OUT plan_min_time float8,
OUT plan_max_time float8,
OUT plan_mean_time float8,
OUT shared_blks_hit int8, -- 28
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
@@ -128,7 +129,9 @@ CREATE VIEW pg_stat_monitor AS SELECT
queryid,
top_queryid,
query,
(SELECT query from pg_stat_monitor(true) s where s.queryid = p.top_queryid) AS top_query,
planid,
query_plan,
(SELECT query from pg_stat_monitor_internal(true) s where s.queryid = p.top_queryid) AS top_query,
application_name,
string_to_array(relations, ',') AS relations,
cmd_type,
@@ -136,12 +139,6 @@ CREATE VIEW pg_stat_monitor AS SELECT
elevel,
sqlcode,
message,
plans,
round( CAST(plan_total_time as numeric), 4)::float8 as plan_total_time,
round( CAST(plan_min_time as numeric), 4)::float8 as plan_min_time,
round( CAST(plan_max_time as numeric), 4)::float8 as plan_max_time,
round( CAST(plan_mean_time as numeric), 4)::float8 as plan_mean_time,
round( CAST(plan_stddev_time as numeric), 4)::float8 as plan_stddev_time,
calls,
round( CAST(total_time as numeric), 4)::float8 as total_time,
round( CAST(min_time as numeric), 4)::float8 as min_time,
@@ -149,7 +146,13 @@ CREATE VIEW pg_stat_monitor AS SELECT
round( CAST(mean_time as numeric), 4)::float8 as mean_time,
round( CAST(stddev_time as numeric), 4)::float8 as stddev_time,
rows,
shared_blks_hit,
plans_calls,
round( CAST(plan_total_time as numeric), 4)::float8 as plan_total_time,
round( CAST(plan_min_time as numeric), 4)::float8 as plan_min_time,
round( CAST(plan_max_time as numeric), 4)::float8 as plan_max_time,
round( CAST(plan_mean_time as numeric), 4)::float8 as plan_mean_time,
shared_blks_hit,
shared_blks_read,
shared_blks_dirtied,
shared_blks_written,
@@ -167,7 +170,7 @@ CREATE VIEW pg_stat_monitor AS SELECT
wal_records,
wal_fpi,
wal_bytes
FROM pg_stat_monitor(TRUE) p, pg_database d WHERE dbid = oid
FROM pg_stat_monitor_internal(TRUE) p, pg_database d WHERE dbid = oid
ORDER BY bucket_start_time;
CREATE FUNCTION decode_error_level(elevel int)