During the weekend I less often check my emails, so I missed this outage: every 10 minutes a cron job should check the health of the repository .. which I disabled to stop the flood of "down" messages for the previous intervention ... just forgot to re-enable the cron job that also tries to repair a corrupted svn db if necessary :-(
Anyway, if I'm not on-line for a longer time, another cron job does check/update/repair about 4 times daily.