Log queries and number of results returned for annual reports.

[benanhalt]

Before changing to POST requests for Solr, I was able to extract this data from the url parameters recorded in the Solr access log. I think that information is no longer being recorded anywhere so a new mechanism will have to be added.

[maxpatiiuk]

Could we modify nginx log format to log POST request body?
https://stackoverflow.com/questions/4939382/logging-post-data-from-request-body

Or would you prefer a less hacky solution?

[benanhalt]

I was looking at the exact same SO post just now.