Performance issues when running a complex constituent query with several organization relationship display fields while merging organizations

If a complex constituent ad-hoc query with tens of thousands of results and many result fields containing revenue fields and relationship fields is running, then a user tries to merge an organization, performance degrades significantly due to sustained blocking.
We are currently evaluating this issue for a fix in a future service pack.

Steps to Duplicate

1) Create a constituent query filtering on every organization. In the result fields, use a dozen or so Relationships\Related Constituent fields, including Relationships\Related Constituent\Revenue fields and Relationships\Related Constituent\Revenue\ Education (Primary).
2) Go to the Preview results tab, which should take several minutes.
3) A minute or two after the query starts running, open a second tab in CRM.
4) In the new tab, go to an organization's record > Merge organization > Select a secondary organization and the other required fields > Save
5) While the merge and query are running simultaneously, notice that navigation around the environment is slow and some users may have issues logging in to the environment.

Environment

 Blackbaud CRM
 4.0
 4.0.173.53

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