HST01DB-DELETE-TIME <days> (default = 14)
HST02DB-DELETE-TIME <days> (default = 28)
HST03DB-DELETE-TIME <days> (default = 60)
HST04DB-DELETE-TIME <days> (default = 800)
Specifies how old (in days) data must be before it is deleted from the HST01DB database. In other words, this value determines how far back history is allowed to accumulate.
A value of zero will cause deletion from the file to stop. This also has the effect of stopping data from being written to the file.
A practical limit to the accumulation of history is that it must fit in the file structure and space available on disk.
Old history data is deleted gradually from the database.
When/if the history file completely fills, the oldest data is deleted anyway to make room for the new data. For best overall operation, the delete time should be short enough to keep the file from filling. However, this is not required.
Examples:
hst01db-delete-time 7 == keep HST01 history 7 days
hst02db-delete-time 30 == keep HST02 history 30 days