okay some more information on my environment
I am using
WebSphere MQ messaging provider with websphere V6.1 and as per google, it doesnot support activation specification, so if i try to create new activation specification , the only option is Default messaging provider.
So back to same question with more info, does any one know how to increase MDP pool size using
-WebSphere V6.1
-MDB with
Ejb 2.x
-WebSphere MQ messaging provider
-P