Around 12:30 we found and fixed the original cause of the slow posting listings and fixed it.
The database index rebuild also completed around noon and the site should be running quicker again.
We're cleaning up a few things and restarting the automation that processes your ended listings and other thing such as leaving feedback and those should start happening and clearing out of the queue over the rest of the evening and things should be back to normal then.
I'd like to apologize for the inconvenience this has caused. We'll be holding a post mortem this coming week to review and put any processes in place that might help something similar from occurring.
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