LONG QUERY (1091 characters long generated

Can you confirm you’re using V2.0.9?

Yes, 2.0.9

WordPress 3.9.1

Long Query

When you see an entry in the log that looks similar to this

[Wed Mar 26 06:26:19 2014] [error] [client 127.0.0.1] LONG QUERY: SELECT DISTINCT user.ID AS user_id, t.* FROM …

We have included it in the log to signify that the length of the query, which would be over 1,024 characters, is a Long Query and may be able to be optimized. We did not take any action on this query, it is just a notice to our customers. These only apply to Select statements, and not any other type of statements.

https://wpengine.com/support/long-query-killed-query-error-logs/