-- запросы онлайн
SELECT * FROM pg_stat_activity order by client_addr;
-- блокировки по пидам
SELECT locktype, relation::regclass, mode, transactionid AS tid,
virtualtransaction AS vtid, pid, granted
FROM pg_catalog.pg_locks l LEFT JOIN pg_catalog.pg_database db
ON db.oid = l.database WHERE (db.datname = 'sandbox' OR db.datname IS NULL)
AND NOT pid = pg_backend_pid()
--3
SELECT locktype, relation::regclass,mode, transactionid AS tid,
virtualtransaction AS vtid,pid, granted
FROM pg_catalog.pg_locks l LEFT JOIN pg_catalog.pg_database db
ON db.oid=l.database WHERE (db.datname='cabinet' OR db.datname IS NULL)
AND NOT pid = pg_backend_pid();
SELECT bl.pid AS blocked_pid,
a.usename AS blocked_user,
kl.pid AS blocking_pid,
ka.usename AS blocking_user,
a.query AS blocked_statement
FROM pg_catalog.pg_locks bl
JOIN pg_catalog.pg_stat_activity a ON a.pid = bl.pid
JOIN pg_catalog.pg_locks kl ON kl.transactionid = bl.transactionid AND kl.pid != bl.pid
JOIN pg_catalog.pg_stat_activity ka ON ka.pid = kl.pid
WHERE NOT bl.granted
select pid,
usename,
pg_blocking_pids(pid) as blocked_by,
query as blocked_query
from pg_stat_activity
where cardinality(pg_blocking_pids(pid)) > 0
SELECT
COALESCE(blockingl.relation::regclass::text,blockingl.locktype) as locked_item,
now() - blockeda.query_start AS waiting_duration, blockeda.pid AS blocked_pid,
blockeda.query as blocked_query, blockedl.mode as blocked_mode,
blockinga.pid AS blocking_pid, blockinga.query as blocking_query,
blockingl.mode as blocking_mode
FROM pg_catalog.pg_locks blockedl
JOIN pg_stat_activity blockeda ON blockedl.pid = blockeda.pid
JOIN pg_catalog.pg_locks blockingl ON(
( (blockingl.transactionid=blockedl.transactionid) OR
(blockingl.relation=blockedl.relation AND blockingl.locktype=blockedl.locktype)
) AND blockedl.pid != blockingl.pid)
JOIN pg_stat_activity blockinga ON blockingl.pid = blockinga.pid
AND blockinga.datid = blockeda.datid
WHERE NOT blockedl.granted
AND blockinga.datname = current_database()
select t.relname,l.locktype,page,virtualtransaction,pid,mode,granted from pg_locks l, pg_stat_all_tables t where l.relation=t.relid order by relation asc;
SELECT blockeda.pid AS blocked_pid, blockeda.query as blocked_query,
blockinga.pid AS blocking_pid, blockinga.query as blocking_query
FROM pg_catalog.pg_locks blockedl
JOIN pg_stat_activity blockeda ON blockedl.pid = blockeda.pid
JOIN pg_catalog.pg_locks blockingl ON(blockingl.transactionid=blockedl.transactionid
AND blockedl.pid != blockingl.pid)
JOIN pg_stat_activity blockinga ON blockingl.pid = blockinga.pid
WHERE NOT blockedl.granted AND blockinga.datname='cabinet';