I didn't know the meta.stackoverflow.com site existed. They should probably make note of it when someone's question gets closed, so that the person asking the question knows they can dispute it. There isn't any indication from the FAQ that you can dispute things like questions being closed by posting to the meta site.
Here's an example of my question that was closed on serverfault:
I specifically asked why my throughout for my database was more than doubling when I decreased the number of vCPUs from 4 to 1. And it was closed as an "exact dupe" of a question asking about how to optimize a VM's performance. There's nothing to optimize in my situation, I had more physical cores than vCPUs, so there was no over-allocation. I get that obviously there must be some contention between the vCPUs, but to double the performance by dropping to a single vCPU? I wouldn't see that type of performance hit on a physical system otherwise multi-process databases wouldn't exist.
I had another question that was arbitrarily closed as a dupe, but I made a comment disputing it, and by some small miracle, the mod removed the dupe status. I can't remember which other question it was at this point since it was modified to remove my comment and the closing. The point is that there is no way to flag the question as being under dispute, and if the moderator decided not to do anything about it, then I couldn't do anything (except post to meta which I just learned today).
EDIT: I posted the wrong link, and just corrected it now.
Ha! A user that's not logged in can't even get to your ServerFault link. They're silently redirected to the duplicate. Even more frustrating (to you, I imagine) is that your question was closed unilaterally by a moderator -- the same moderator that asked the question that it's redirecting to.
Here's an example of my question that was closed on serverfault:
http://serverfault.com/questions/342191/performance-of-sql-s...
I specifically asked why my throughout for my database was more than doubling when I decreased the number of vCPUs from 4 to 1. And it was closed as an "exact dupe" of a question asking about how to optimize a VM's performance. There's nothing to optimize in my situation, I had more physical cores than vCPUs, so there was no over-allocation. I get that obviously there must be some contention between the vCPUs, but to double the performance by dropping to a single vCPU? I wouldn't see that type of performance hit on a physical system otherwise multi-process databases wouldn't exist.
I had another question that was arbitrarily closed as a dupe, but I made a comment disputing it, and by some small miracle, the mod removed the dupe status. I can't remember which other question it was at this point since it was modified to remove my comment and the closing. The point is that there is no way to flag the question as being under dispute, and if the moderator decided not to do anything about it, then I couldn't do anything (except post to meta which I just learned today).
EDIT: I posted the wrong link, and just corrected it now.