System Statistics
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Revision as of 13:04, 27 March 2013
System Statistics is a tool that allows the monitoring of the evolution of the system status. It gathers statistics at a fixed interval and stores them. Those statistics can then be used to generate graphs.
Statistics Collection
The gathered statistics are determined by the Global Polling Level. By default, this value is set to Level 3. This means that only statistics level 3 or higher are queried. A list of all the available statistics for your system can be found on the statistics dictionary page.
Statistics are queried at a fixed interval. By default, this is set so statistics are queried once every 2 minutes. Once queried, the statistics are saved on disk for future use. If the statistics grow over a configurable size, statistics will be deleted starting by the oldest ones. This will, at most, delete a single day's statistics at a time.
To ease configuration, an estimate of the covered period is given on the statistics configuration page. However, if there is a configuration change, it will take at least one statistics query cycle before an estimate is available. Following that, it will take some time for the estimate to become accurate again.
