How to determine total number of open/active connections in ms sql server 2005

Question

My PHP/MS Sql Server 2005/win 2003 Application occasionally becomes very unresponsive, the memory/cpu usage does not spike. If i try to open any new connection from sql man

Answer 1

see sp_who it gives you more details than just seeing the number of connections

in your case i would do something like this

 DECLARE @temp TABLE(spid int , ecid int, status varchar(50),
                     loginname varchar(50),   
                     hostname varchar(50),
blk varchar(50), dbname varchar(50), cmd varchar(50), request_id int) 
INSERT INTO @temp  

EXEC sp_who

SELECT COUNT(*) FROM @temp WHERE dbname = 'DB NAME'