Help Needed :: urgent

Hello,

I used perl DBI module for my threading concept.but i am getting problem,
few things not working because of DBI resource break some time when more
connection made on mysql.
some block issue happen on my product because DBI.
Let me know how to find out DBI resource count and valid DBI resource count.
Note: i am using $dbh as golbal variable for thread concept.

Please give me solution as soon as possible.

Thanks for your time.

regards,
Veerasekar