dbcc INPUTBUFFER(87)
dbcc INPUTBUFFER(87)
下面的查询显示 SQL 等待分析和前 10 个等待的资源。
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select top 10 *
from sys.dm_os_wait_stats
--where wait_type not in ('CLR_SEMAPHORE','LAZYWRITER_SLEEP','RESOURCE_QUEUE','SLEEP_TASK','SLEEP_SYSTEMTASK','WAITFOR')
order by wait_time_ms desc
select top 10 *
from sys.dm_os_wait_stats
--where wait_type not in ('CLR_SEMAPHORE','LAZYWRITER_SLEEP','RESOURCE_QUEUE','SLEEP_TASK','SLEEP_SYSTEMTASK','WAITFOR')
order by wait_time_ms desc
若要找出哪个 spid 正在阻塞另一个 spid，可在数据库中创建以下存储过程，然后执行该存储过程。此存储过程会报告此阻塞情况。键入 sp_who 可找出 @spid;@spid 是可选参数。
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create proc dbo.sp_block (@spid bigint=NULL)
as
select
t1.resource_type,
'database'=db_name(resource_database_id),
'blk object' = t1.resource_associated_entity_id,
t1.request_mode,
t1.request_session_id,
t2.blocking_session_id
from
sys.dm_tran_locks as t1,
sys.dm_os_waiting_tasks as t2
where
t1.lock_owner_address = t2.resource_address and
t1.request_session_id = isnull(@spid,t1.request_session_id)
create proc dbo.sp_block (@spid bigint=NULL)
as
select
t1.resource_type,
'database'=db_name(resource_database_id),
'blk object' = t1.resource_associated_entity_id,
t1.request_mode,
t1.request_session_id,
t2.blocking_session_id
from
sys.dm_tran_locks as t1,
sys.dm_os_waiting_tasks as t2
where
t1.lock_owner_address = t2.resource_address and
t1.request_session_id = isnull(@spid,t1.request_session_id)
以下是使用此存储过程的示例。
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exec sp_block
exec sp_block @spid = 7
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