JIRA's Activity Stream dashboard gadget lets you see recent activity in JIRA and other connected systems. The activity stream can be filtered (for example, by project) to show you only the changes that concern you or your team. In addition, Activity tab on the issue page displays recent activity that has affected the viewed issue.
With the Structure plugin installed, Activity Stream gadget may be configured to include changes made to structures. The activity stream on the issue page automatically includes all changes to all structures that affect the position of the viewed issue.
To activate the Structure stream, select the Structure option in the Available Streams section of the Activity Stream gadget configuration.
The following filters are available for the Structure activity stream:
All Global Filters are supported by Structure Stream as well – you can filter structure changes by Project, Issue Key, Update Date and Username.
Changes in the Structure activity stream are ordered chronologically, newest first. For each change a short summary is displayed, containing:
When viewing activity stream in the Full View, the following is also shown:
Parent Path is a sequence of issue keys: first, a top-level issue, then its sub-issue, then sub-sub-issue, and so on until the parent of the affected issue is displayed. Hover mouse over an issue key to view the issue's summary, or click it to go to that issue.
On this screenshot, items 1, 2 and 3 are Structure activities.
In the Full View, click on the time of the change to open that change on the Structure Board in the History View.
Structure's activity stream is optimized to quickly provide data for the most common activity requests from Dashboard, Issue Activity, User Activity and Project Activity page.
It is possible however, if you use a complex search query on a JIRA instance with large history of structure changes, that querying database will take longer time than Activity Streams allows and you will not see any results. (There should be a message that "one of the activity streams providers took long time to provide an answer".)
If that is the case, try to reduce the amount of conditions you are using or contact support for help.