Storage table rows counts and size estimates

MySQL storage tables were displaying inaccurate results. Tables loaded by full load often shown zero rows and 32KB size even if the table had many GB.

This bug is now fixed, and these estimates are updated every hour. These values are still not accurate however, as the approximations provided by MySQL are used as the source of these values and they may vary from the actual values by as much as 40 to 50%.

This bug does not affect Redshift storage, row counts and sizes are 100% accurate for Redshift and always have been.