Update posgresql_diagnostic/diagnositc.sql

posgresql_diagnostic/diagnositc.sql

@@ -55,3 +55,41 @@ FROM pg_stat_activity
 WHERE application_name LIKE '%DBeaver%'
 AND state = 'active';
 
+
+-- Включить pg_stat_statements на всех узлах
+CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
+
+-- Топ медленных запросов по кластеру
+SELECT query, calls, total_time, mean_time, rows
+FROM pg_stat_statements
+ORDER BY total_time DESC
+LIMIT 10;
+
+-- Проверить распределение нагрузки
+SELECT datname, usename, count(*) as connections
+FROM pg_stat_activity 
+WHERE state = 'active'
+GROUP BY datname, usename;
+
+
+-- Блокирующие запросы
+SELECT blocked_locks.pid AS blocked_pid,
+       blocking_locks.pid AS blocking_pid,
+       blocked_activity.query AS blocked_query,
+       blocking_activity.query AS blocking_query
+FROM pg_catalog.pg_locks blocked_locks
+JOIN pg_catalog.pg_locks blocking_locks 
+    ON blocking_locks.locktype = blocked_locks.locktype
+    AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE
+    AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation
+    AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page
+    AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple
+    AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid
+    AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid
+    AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid
+    AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid
+    AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
+    AND blocking_locks.pid != blocked_locks.pid
+JOIN pg_catalog.pg_stat_activity blocked_activity ON blocked_activity.pid = blocked_locks.pid
+JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
+WHERE NOT blocked_locks.granted;