Removal of Namespace Limits
With summer 16, the previous limit of 10 namespaces in an execution context has been eliminated. In doing so, there are now some secondary limits that apply even to certified managed packages. For example: If the limit per namespace for SOQL queries is 100, there is a new overall limit to SOQL queries that applies across all namespaces which is currently 11 times the per package limit.
Query selectivity now applies when there are over 200,000 rows (up from 100,000)