Data compaction, essentially, is reducing redundancy in the data to be stored in the database by using a rule so that you store sampled data instead of raw data, which prevents storing of redundant data which potentially can overload the database. The compaction rule is defined through the following fields:
Condense Interval: The time interval at which the cache history is condensed. The default is 60 seconds, which means that every 60 seconds all rows of the same index are condensed. As a result of this first condensing operation there will be only one row per index every minute. The following caches are impacted by this setting: JvmGcInfo, JvmMemoryPool, JvmOperatingSystem, JvmThreading, JvmMemory, RtvDataServerManager and RtvDataServerClientTotals.
Condense Raw Time: The time span of raw data kept in memory. The default is 1200 seconds. The following caches are impacted by this setting: JvmGcInfo, JvmMemoryPool, JvmOperatingSystem, JvmThreading, JvmMemory, RtvDataServerManager, RtvDataServerClientTotals, TomcatWebModuleStats, TomcatGlobalRequestStats and TomcatWebModuleTotals.
Compaction Rules: This field defines the rules used to condense your historical data in the database. By default, the columns kept in history are aggregated by averaging rows with the following rule 1h -;1d 5m;2w 15m, which means the data from the last hour is not aggregated (1h - rule), the data from the last day is aggregated every 5 minutes (1d 5m rule), and the data from the last 2 weeks old is aggregated every 15 minutes (2w 15m rule). The following caches are impacted by this setting: JvmOperatingSystem, JvmThreading, JvmMemory, RtvDataServerManager, RtvDataServerClientTotals, TomcatWebModuleStats, TomcatGlobalRequestStats and TomcatWebModuleTotals.
To modify these settings do the following:
Open the RTView Configuration Application for RTView Manager and go to RTView Manager>DATA STORAGE tab.
Under Compaction, enter values in the Condense Interval, Condense Raw Time and Compaction Rules fields.
your settings, then click Click 
to apply changes.