java - Analyse heap dump with visual vm that contains multiple webapplications -

i got heap dump of tomcat server hosts several web applications.

there several classes have instances in each of applications. when list classes contained in dump multiple lines classes each showing different amount of instances. seems each line shows amount of instances of said class in 1 of web applications.

when use oql count instances of class, e.g. select count( heap.instances(myclass) ) not total amount of instances of myclass amount equal 1 of shown in before mentioned list.

so seems me reason oql queries limited 1 web application context, though heap dump contains several.

what can access instances of heap dump?

it seems can @ least navigate desired instances double clicking on respective entry in classes view. still navigating oql seems impossible.

using eclipse memory analyzer helps in way has other short comings me not unfortunately.