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_start |state_change |wait_event_type|wait_event|state |backend_xid|backend_xmin|query |backend_type | ---...
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...
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...
EN作者介绍 shuobjli（李硕），腾讯云数据库专家工程师，主要研究方向为数据库优化器、执行器、索引管理...
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...
wait_event_type "wait_event_type(等待类型)" --,a.wait_event "wait_event(等待事件)" --,a.state "state(状态)" --,a.query "sql(执行的sql)" --,a.backend_type "backend_type(后端类型)" from pg_stat_activity a left join pg_roles b on (a.usesysid = b.oid) where a.state = '...
Wait eventDefinition Client:ClientRead This event occurs when RDS for PostgreSQL is waiting to receive data from the client. Client:ClientWrite This event occurs when RDS for PostgreSQL is waiting to write data to the client. CPU This event occurs when a thread is active in CPU or is wai...
,a2.datname,a2.usename,a2.application_name,a2.client_addr,a2.wait_event_type,a2.wait_event,a2.state --,a2.backend_start,a2.xact_start,a2.query_start from tmp3 a0 left outer join (select distinct '/'||id||'/' as prefix_id,id ...
intepoll_wait(intepfd,//epoll_create函数返回的epoll实例的句柄structepoll_event*events,//出参。Epoll将发生的事件集合从内核复制到该数组intmaxevents,//本次可以返回的最大事件数目inttimeout//超时时间。-1:阻塞;0:不阻塞;>0:等待超时时间,单位ms); ...