postgres locks - ghdrako/doc_snipets GitHub Wiki

• https://www.postgresql.org/docs/current/view-pg-locks.html
• https://wiki.postgresql.org/wiki/Lock_Monitoring

Locks

select relation::regclass, * from pg_locks;
SELECT pid,  MODE,  locktype,  relation::regclass,  page,  tuple  FROM pg_locks  WHERE pid in ('508499',  '508335');

select pid, state, usename, query, query_start 
from pg_stat_activity 
where pid in (  select pid from pg_locks l 
  join pg_class t on l.relation = t.oid 
  and t.relkind = 'r'  where t.relname = 'log_operacji');

select nspname, relname, l.* 
from pg_locks l 
    join pg_class c on (relation = c.oid) 
    join pg_namespace nsp on (c.relnamespace = nsp.oid)
where pid in (select pid 
              from pg_stat_activity
              where datname = current_database() 
                and query != current_query());