The gent collection of usefull postgres views

gistfile1.sql

-- Blocked Queries
CREATE VIEW blocked_queries AS
SELECT blocked_locks.pid AS blocked_pid,
blocked_activity.usename AS blocked_user,
blocking_locks.pid AS blocking_pid,
blocking_activity.usename AS blocking_user,
blocked_activity.query AS blocked_statement,
blocking_activity.query AS blocking_statement
FROM pg_catalog.pg_locks blocked_locks
JOIN pg_catalog.pg_stat_activity blocked_activity ON blocked_activity.pid = blocked_locks.pid
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 blocking_activity ON blocking_activity.pid = blocking_locks.pid
WHERE NOT blocked_locks.granted;

-- Sizes of Databases
CREATE VIEW db_sizes AS
SELECT d.datname AS Name, pg_catalog.pg_get_userbyid(d.datdba) AS Owner,
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT')
THEN pg_catalog.pg_size_pretty(pg_catalog.pg_database_size(d.datname))
ELSE 'No Access'
END AS Size
FROM pg_catalog.pg_database d
ORDER BY
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT')
THEN pg_catalog.pg_database_size(d.datname)
ELSE NULL
END DESC;

-- Sizes of Tables
CREATE VIEW table_sizes AS
SELECT nspname || '.' || relname AS "relation",
pg_size_pretty(pg_relation_size(C.oid)) AS "size"
FROM pg_class C
LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
WHERE nspname NOT IN ('pg_catalog', 'information_schema')
ORDER BY pg_relation_size(C.oid) DESC;

-- Total Rows in all Tables
CREATE VIEW total_db_rows AS
SELECT sum(reltuples) FROM pg_class r JOIN pg_namespace n ON (relnamespace = n.oid) WHERE relkind = 'r' AND n.nspname = 'public';

-- Total Rows in each Table
CREATE VIEW total_tables_rows AS
SELECT relname, reltuples FROM pg_class r JOIN pg_namespace n ON (relnamespace = n.oid) WHERE relkind = 'r' AND n.nspname = 'public' order by reltuples desc;

-- Long Queries
CREATE VIEW long_queries AS
SELECT pg_stat_activity.pid,
now() - pg_stat_activity.query_start AS duration,
pg_stat_activity.query
FROM pg_stat_activity
WHERE pg_stat_activity.state = 'active'::text AND (now() - pg_stat_activity.query_start) > '00:02:00'::interval;