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 ...
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...
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...
select * from pg_stat_activity; select pid,now()-query_start as "执行时间",wait_event_type,wait_event,query from pg_stat_activity; 上面两个SQL执行的效果是一致的,直接查看整个视图信息会较全,但是比较多,可使用第二个视图,其中,wait_event wait_event_type 字段代表等待事件。不同的等待事件代表不...
select pid,pg_blocking_pids(pid),wait_event_type,wait_event,query from pg_stat_activity ; pid : 当前会话,被阻塞者 pg_blocking_pids(pid) : 阻塞者 wait_event_type : 会话状态,Lock表示被阻塞无法获取锁资源 wait_event : 等待事件 query : 会话执行相关查询 ...
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...
添加了 pg_wait_events 视图,可以结合 pg_stat_acitvity 快速知晓对应的等待事件信息 postgres=# SELECT psa.pid, psa.application_name, psa.wait_event, we.description FROM pg_stat_activity psa JOIN pg_wait_events we ON (psa.wait_event_type = we.type AND psa.wait_event = we.name); pid | ...
wait_event_type : 会话状态,Lock表示被阻塞无法获取锁资源 wait_event : 等待事件 query : 会话执行相关查询 ## 事务三查看锁等待 ## 可以看到28363会话正在等待27152会话 db1=# select pid,pg_blocking_pids(pid),wait_event_type,wait_event,query from pg_stat_activity ; ...
This wait event occurs when operations write to the temporary files. For more information, see IO:BufFileRead and IO:BufFileWrite. IO:ControlFileRead A process is waiting for a read from the pg_control file. IO:ControlFileSync A process is waiting for the pg_control file to reach durable...
Wait eventDefinition Client:ClientRead This event occurs when Aurora PostgreSQL is waiting to receive data from the client. Client:ClientWrite This event occurs when Aurora PostgreSQL is waiting to write data to the client. CPU This event occurs when a thread is active in CPU or is waiting for...