By default, when you conduct a search, Log Center shows the list of issues in a detailed view. You can also view the list in compact view.
The histogram shows a graph of the number of issues logged in a time interval. The initial time interval is 15 minutes; this changes with the time filter. The minimum value for the aggregation interval is 1 minute. All represents the aggregated count for all the logs; hits represents the aggregated count for the result of filters and keyword search.