It would be useful to have a way to show statistics about the change dispatching process. dispatchChanges.php should have a --stats option, and perhaps there could also be a special page that allows these stats to be seen without shell access.

The following statistics would be useful:

• Number of target wikis
• current (max) change id and max change timestamp
• size of the wb_changes table
• the target most recently updated, with change id and timestamp
• the target least recently updated, with change id and timestamp (based on wb_change_dispatch.chd_seen and chd_touched).
• show id and timestamp of the *median* target.

Version: unspecified
Severity: normal