SQL - 如何查找正在使用所有最大并发连接的操作

Question

我有一个SQL Server达到并发连接的最大限制.我有许多不同的服务器和服务同时连接到一个SQL Server.

我确实找到了另一个似乎有用的查询:

SELECT DB_NAME(dbid) AS DBName,
   COUNT(dbid)   AS NumberOfConnections,
   loginame      AS LoginName,
   nt_domain     AS NT_Domain,
   nt_username   AS NT_UserName,
   hostname      AS HostName
FROM   sys.sysprocesses
WHERE  dbid > 0
GROUP  BY dbid,
      hostname,
      loginame,
      nt_domain,
      nt_username
ORDER  BY NumberOfConnections DESC;

但是,这给了我很好的连接数.那么我发现另一个查询似乎吐出了正在运行的sql语句等.

SELECT
SPID                = er.session_id
,STATUS             = ses.STATUS
,[Login]            = ses.login_name
,Host               = ses.host_name
,BlkBy              = er.blocking_session_id
,DBName             = DB_Name(er.database_id)
,CommandType        = er.command
,SQLStatement       = st.text
,ObjectName         = OBJECT_NAME(st.objectid)
,ElapsedMS          = er.total_elapsed_time
,CPUTime            = er.cpu_time
,IOReads            = er.logical_reads + er.reads
,IOWrites           = er.writes
,LastWaitType       = er.last_wait_type
,StartTime          = er.start_time
,Protocol           = con.net_transport
,ConnectionWrites   = con.num_writes
,ConnectionReads    = con.num_reads
,ClientAddress      = con.client_net_address
,Authentication     = con.auth_scheme
FROM sys.dm_exec_requests er
OUTER APPLY sys.dm_exec_sql_text(er.sql_handle) st
LEFT JOIN sys.dm_exec_sessions ses
ON ses.session_id = er.session_id
LEFT JOIN sys.dm_exec_connections con
ON con.session_id = ses.session_id

我将如何将这两个查询合并在一起？我相信这两个问题一起会给我我需要的东西.

Answer 1

不完全确定您想要的输出是什么；您可以通过直接连接 session_id = spid 将两个查询连接在一起（没有组）。

SELECT
spr.loginame as LoginName,
spr.nt_domain     AS NT_Domain,
spr.nt_username   AS NT_UserName,
spr.hostname      AS HostName,

STATUS             = ses.STATUS
,[Login]            = ses.login_name
,Host               = ses.host_name
,BlkBy              = er.blocking_session_id
,DBName             = DB_Name(er.database_id)
,CommandType        = er.command
,SQLStatement       = st.text
,ObjectName         = OBJECT_NAME(st.objectid)
,ElapsedMS          = er.total_elapsed_time
,CPUTime            = er.cpu_time
,IOReads            = er.logical_reads + er.reads
,IOWrites           = er.writes
,LastWaitType       = er.last_wait_type
,StartTime          = er.start_time
,Protocol           = con.net_transport
,ConnectionWrites   = con.num_writes
,ConnectionReads    = con.num_reads
,ClientAddress      = con.client_net_address
,Authentication     = con.auth_scheme
FROM [sys.dm_exec_requests][1] er
OUTER APPLY sys.dm_exec_sql_text(er.sql_handle) st
LEFT JOIN sys.dm_exec_sessions ses
ON ses.session_id = er.session_id
LEFT JOIN sys.dm_exec_connections con
ON con.session_id = ses.session_id
left outer join sys.sysprocesses spr
on er.session_id = spr.spid