Comment 4 for bug 1531834

After ~12h

+--------------------+---------+---------+---------+--------+
| Table | #Rows | dataMB | idxMB | SizeMB |
+--------------------+---------+---------+---------+--------+
| graphs_items | 1306 | 1.23 | 1.23 | 0.25 |
| events | 4317 | 2.77 | 4.77 | 0.77 |
| trends | 12780 | 14.92 | 0.00 | 1.52 |
| item_discovery | 14497 | 14.92 | 7.85 | 2.31 |
| items_applications | 15336 | 14.92 | 18.15 | 3.36 |
| items | 15227 | 54.31 | 26.15 | 8.17 |
| trends_uint | 109140 | 113.38 | 0.00 | 11.52 |
| history_text | 99637 | 44.46 | 98.77 | 14.55 |
| history | 394599 | 182.62 | 182.62 | 37.09 |
| history_str | 432500 | 182.62 | 192.62 | 38.11 |
| history_uint | 3330001 | 1592.00 | 1465.54 | 310.53 |
+--------------------+---------+---------+---------+--------+