if summary graphs are showing “holes” in the data, i suggest removing all the historical .sdb files and letting wview re-create them from the archive .sdb - they are just cached summaries derived from archive data
to be more precise, something like
$ stop wview
$ cd var/wview/archive
$ mv wview-hilow.sdb wview-hilow.sdb-save
$ mv wview-history.sdb wview-history.sdb-save
$ mv wview-noaa.sdb wview-noaa.sdb-save
$ # DO NOT mv wview-archive.sdb AS THIS IS THE MASTER DATA
$ start wview
noting that re-generating the history files can take long time if slow cpu and lots of history - be patient, watch the logs
and if using the NOAA files then, before starting wview, also put their whole folder aside, something like
$ cd var/wview
$ mv noaa noaa-save
finally, when confident that all is working properly, remove the saved files