Tempdb Performance Issue

My Sql 2005 SP1 has performance trouble this afternoon. I
noticed a lot PageLatch_up and PageLatch_sh waiting with 2:1:1. I think the
problem may be caused by the tempdb. There are more than 1000 temp tables. The number
of user connections is abnormally high. “SELECT
*
FROM tempdb.dbo.sysobjects� cannot be finished due to blocking.


I restarted the server to fix
the problem temporaryly.



Any clue to fix the problem? Does it help to replace temp
table with table variable in stored procedures? “Drop temp table� are called in
procedures, why the temp tables are still in the tempdb?

 

Thanks for your help.