> #### Environment variables for Trend Data Compaction jobs

> Table 2–1 identifies and describes the environment variables used with database compaction jobs.

> Table 2–1: Environment variables for Trend Data Compaction jobs
> Variable | Description
> --- | ---
> FM_DBCCOMPACTDAYS | Identifies the number of days for which you intend to compact data. A day, as defined for this field, begins at midnight.
> FM_DBCPURGEDAYS | Specifies the number of days' worth of data you want purged from the database.

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