README.md: mention that -retentionPeriod must cover the backfilled data

This commit is contained in:
Aliaksandr Valialkin 2019-08-24 13:48:54 +03:00
parent fb8840ac38
commit c4e75f09dc

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@ -687,6 +687,8 @@ The most interesting metrics are:
### Backfilling ### Backfilling
Make sure that configured `-retentionPeriod` covers timestamps for the backfilled data.
It is recommended disabling query cache with `-search.disableCache` command-line flag when writing It is recommended disabling query cache with `-search.disableCache` command-line flag when writing
historical data with timestamps from the past, since the cache assumes that the data is written with historical data with timestamps from the past, since the cache assumes that the data is written with
the current timestamps. Query cache can be enabled after the backfilling is complete. the current timestamps. Query cache can be enabled after the backfilling is complete.