Configure database summarization
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Hours to persist minutely data
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Days to persist hourly data
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Days to persist daily data
To configure database summarization
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Navigate to System \> Analytics Settings \> Database Summarization.
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Click the Insight type you want to configure the database summarization.

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Specify the duration for which you want to retain Insight data on NetScaler ADM. For example, for Gateway Insight, you can store your analytics’ minutely historical data for 2 hours, or hourly data for 1 day.
