在PostgreSQL中,查询锁表信息通常涉及使用系统表pg_locks和pg_stat_activity。以下是如何执行锁表查询的详细步骤: 1. 确定需要查询的锁表信息类型 首先,你需要明确想要查询的锁类型。PostgreSQL中的锁类型包括但不限于: 事务锁(Transaction Locks):用于保护事务的一致性。 关系锁(Relation Locks):用于保护数据库对象(...
coalesce((pg_blocking_pids(l.pid))[1]||'.'||coalesce(casewhenlocktype='transactionid'then1elsearray_length(pg_blocking_pids(l.pid),1)+1end,0),a.pid||'.0')lock_depth, a.query FROM pg_stat_activity a JOIN sos s on(a.pid=any(s.pids)) LEFT OUTER JOIN pg_locks l on(a.pid=...
usename, query, query_start FROM pg_stat_activity WHERE pidIN(SELECTpidFROMpg_locks lJOINpg_class TONl.relation=T.oidANDT.relkind='r');
我遇到了 Locks Monitoring 文章并尝试运行以下查询: 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_c...
select oid from pg_class where relname='表名' #注意pg_class不是全局,需要切换到相应的库里去查询 记住2个oid的值 select pid from pg_locks where relation = oid的值 select datname,query,pid from pg_stat_activity where pid in (pid的值) 查看锁的类型 ...
#等待事件,根据阻塞的语句的会话PID做相应处理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_locks bl JOIN pg_stat_activity a ON a.pid = bl.pid ...
Part III. Locks Relation-Level Locks · Row-Level Locks · Miscellaneous Locks · Locks in Memory Part IV. Query Execution Query Execution Stages · Statistics · Table Access Methods · Index Access Methods · Index Scan · Nested Loop · Hashing · Merging and Sorting ...
keycloak=# show max_locks_per_transaction; max_locks_per_transaction --- 10240 (1 row) 重启数据库,或者直接重启docker容器。 在sql查询那里执行这个删除函数: CREATE OR REPLACE FUNCTION drop_all_tables_in_schema(schema_name TEXT) RETURNS void AS $$ DECLARE r RECORD; BEGIN FOR r IN (SELECT ta...
Hi, I noticed that since version 1.1.0 of DistributedLock.Postgres, the library supports transaction-scoped advisory locks, if you choose to use them. I understand that it was added as part of the following issue - #168, as it turned out...
b.queryASblocking_query, b.stateASblocking_state FROM pg_stat_activity a JOINpg_locks l1 ON a.pid = l1.pid JOINpg_locks l2 ON l1.locktype = l2.locktypeANDl1.database = l2.databaseANDl1.relation = l2.relation JOINpg_stat_activitybON l2.pid =b.pid ...