المدربPer-symbol resynchronisation repairs a book after a sequence gap by fetching a snapshot for the symbols whose own update sequence shows the gap, rather than for every symbol carried by the connection on which messages were lost.
| Snapshot depth | Weight | Per symbol (5 books) | Per connection (80 books) | Last book back |
| (stale symbol-s) | (stale symbol-s) | per connection (s) | ||
| 5 000 levels | 250 | 0.5 | 5 769 | 180.1 |
| 1 000 levels | 50 | 0.5 | 11.2 | 0.2 |
nw_api.resync_rows().