For tuning data retention rules (beware of the alpha order in which .config files are processed)

ArtifactTableRetentionPatch.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <sitecore>
    <scheduling>
      <agent type="Sitecore.Tasks.CleanupEventQueue, Sitecore.Kernel">
        <patch:delete />
      </agent> 
      <agent type="Sitecore.Tasks.CleanupEventQueue, Sitecore.Kernel" method="Run" interval="01:00:00">
            <IntervalToKeep>06:00:00</IntervalToKeep>
      </agent>  
      
      <agent type="Sitecore.Tasks.CleanupPublishQueue, Sitecore.Kernel">
        <patch:delete />
      </agent>    
      <agent type="Sitecore.Tasks.CleanupPublishQueue, Sitecore.Kernel" method="Run" interval="04:00:00">
        <DaysToKeep>7</DaysToKeep>
      </agent>
    </scheduling>
  
    <databases>
      <database id="master">
        <Engines.HistoryEngine.Storage>
          <patch:delete />
        </Engines.HistoryEngine.Storage>
        <Engines.HistoryEngine.Storage>
          <obj type="Sitecore.Data.SqlServer.SqlServerHistoryStorage, Sitecore.Kernel">
            <param connectionStringName="$(id)" />
            <EntryLifeTime>7.00:00:00</EntryLifeTime>
          </obj>
        </Engines.HistoryEngine.Storage>
      </database>
	
      <database id="web">
        <Engines.HistoryEngine.Storage>
          <patch:delete />
        </Engines.HistoryEngine.Storage>
        <Engines.HistoryEngine.Storage>
          <obj type="Sitecore.Data.SqlServer.SqlServerHistoryStorage, Sitecore.Kernel">
            <param connectionStringName="$(id)" />
            <EntryLifeTime>7.00:00:00</EntryLifeTime>
          </obj>
        </Engines.HistoryEngine.Storage>
      </database>
    </databases>

  </sitecore> 
</configuration>