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Oracle® ZFS Storage Appliance Analytics Guide, Release OS8.7.x

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Updated: August 2017

Statistics Actions

The following actions can be performed on statistics/datasets:

Table 10  Actions Performed on Statistics/Datasets
Begin reading from the statistic (every second) and cache values in memory as a dataset. In Open Worksheets, statistics are opened when they are added to the view, allowing them to be graphed in real-time. The data is kept in memory while the statistic is being viewed.
Closes the statistic view, discarding the in memory cached dataset.
Sets the statistic to be permanently opened and archived to disk. If the statistic had already been opened, then all cached data in memory is also archived to disk. Archiving statistics creates permanent datasets, visible in the Datasets view (those with a non-zero "on disk" value). This is how statistics may be recorded 24x7, so that activity from days, weeks and months in the past can be viewed after the fact.
Discard data
Manage the amount of data stored for a particular statistic. You can select to discard the entire dataset or select to remove one of the following granularities of archived data: Second, Minute, or Hour. Note that if you want to delete a higher level of granularity, you must also delete any lower level of granularity. For example, to delete the Minute granularity, you must also delete the Second granularity. If you select to not discard the entire dataset, you can discard older data and retain only newer data. You enter an integer value in the "Older than" text box and then select the unit of time: hours, days, weeks, or months. For example, if you want to only retain three weeks of stored data for the selected statistic, you enter a "3" into the "Older than" text box and then select "weeks" from the drop-down menu.
Pause an archived statistic. New data will not be read, but the existing disk archive will be left intact.
Resumes a previously suspended statistic, so that it will continue reading data and writing to the archive.