注意时间戳、等待事件和状态列。 backend_start | 2022-10-25 09:25:07.934633+00xact_start | 2022-10-25 09:25:11.238065+00query_start | 2022-10-25 09:25:11.238065+00state_change | 2022-10-25 09:25:11.238381+00wait_event_type | Clientwait_event | ClientReadstate | idle in transaction ...
Wait Event TypeWait Event NameDescription LWLock ShmemIndexLock Waiting to find or allocate space in shared memory. OidGenLock Waiting to allocate or assign an OID. XidGenLock Waiting to allocate or assign a transaction id. ProcArrayLock Waiting to get a snapshot or clearing a transaction id ...
wait_event|ClientRead state|idleintransactionbackend_xid|1286297004backend_xmin|query|truncatea;backend_type|client backend 如果当前状态没有找到具体是哪条SQL导致的锁,则需要从审计日志中查找(开启log_statements='all')。重点关注wait_event_type和state字段。这里说明该holder执行完事务后处于空闲状态,正等待客...
This wait event is experienced whenever the database needs to open a file. Wait time is recorded beginning just prior to when the open request is issued until the time the request is returned, having Oracle 数据库 OraclecursorpinSwaitonX等待事件说明 这个等待事件也算一个常见的等待事件。 在...
select wait_event_type,wait_event,state,query,a.* from pg_stat_activity a where query like 'insert%'; 1. wait_event_type|wait_event|state |query |datid |datname|pid |leader_pid|usesysid|usename|application_name |client_addr |client_hostname|client_port|backend_start |xact_start |query...
pid)::shardman.processFROMpg_stat_activityWHEREapplication_nameLIKE'pgfdw:%'ANDwait_event<>'ClientRead'UNIONALL-- otherwise, coordinator itself is busy, potentially waiting, so add fdw ->-- coordinator edgeSELECTROW(shardman.get_my_id(), ...
Client服务器进程正在套接字上等待来自用户应用的某种活动,并且该服务器预期某种与其内部处理无关的事情发生。wait_event将标识特定的等待点。 IPC服务器进程正在等待来自服务器中另一个进程的某种活动。wait_event将标识特定的等待点。 Timeout服务器进程正在等待超时发生。wait_event将标识特定的等待点。 IO服务器进程...
Client服务器进程正在套接字上等待来自用户应用的某种活动,并且该服务器预期某种与其内部处理无关的事情发生。wait_event将标识特定的等待点。 IPC服务器进程正在等待来自服务器中另一个进程的某种活动。wait_event将标识特定的等待点。 Timeout服务器进程正在等待超时发生。wait_event将标识特定的等待点。 IO服务器进程...
postgres=# select pid,datname,wait_event_type,wait_event,state,query from pg_stat_activity where state !='idle' and pid!=pg_backend_pid(); pid | datname | wait_event_type | wait_event |state| query ---+---+---+---+---+--- 14823 | dbmspgdb | Lock| transactionid | active...
wait_event | ClientRead state | idleintransactionbackend_xid | backend_xmin | query |selectpg_backend_pid(); backend_type | client backend 可以看到这个会话的backend_xid和backend_xmin都没有值,因为它没有对数据库有任何写操作所以不需要申请事务号,因此backend_xid为空。