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docs(clustered): clarify tuning garbage collector env vars (#5517) 

* docs: clarify clustered gc env tunables

* docs: use suggested wording

Co-authored-by: Scott Anderson <sanderson@users.noreply.github.com>

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Co-authored-by: Scott Anderson <sanderson@users.noreply.github.com>
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content/influxdb/clustered/write-data/best-practices/data-lifecycle.md
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@ -45,6 +45,9 @@ Use the following environment variables to tune the garbage collector:
- `INFLUXDB_IOX_GC_PARQUETFILE_CUTOFF`: how long to retain rows in the Catalog - `INFLUXDB_IOX_GC_PARQUETFILE_CUTOFF`: how long to retain rows in the Catalog
that reference Parquet files marked for deletion. The default is `30d`. that reference Parquet files marked for deletion. The default is `30d`.
These values tune how aggressive the garbage collector can be. A shorter duration
value means that files can be removed at a faster pace.
{{% warn %}} {{% warn %}}
To ensure there is a grace period before files and references are removed, the To ensure there is a grace period before files and references are removed, the
minimum garbage collector (GC) object store and Parquet file cutoff time is minimum garbage collector (GC) object store and Parquet file cutoff time is