I've actually abandoned EOC, as I found it created too much load on the Orion Web servers when it's polling/pulling data.
I would find the individual Orion web pages would sometimes take "forever" to load and was trying to figure out why.
I used Netflow to find out who had Orion open on some complex page which was being auto-refreshed, causing the slowness for everyone else.
To my surprise, I saw the EOC server transferring huge amounts for data from the web interface every 5 minutes.
I stopped EOC polling and have had not issue with Orion web page loading performance since.
I stopped renewing maintenance for this product last year, and am instead consolidating all my Orion pollers into one single DB using the new stackable APE's.