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Magento




Cron schedule setting






Admin > System > Config > System - Cron

	From experience, your schedule ahead needs to be larger than your generate every. 
		Generate Schedules Every  60
		Schedule Ahead for  90
		Missed if Not Run Within  120
		History Cleanup Every  60
		Success History Lifetime  1440
		Failure History Lifetime  1440

	Active crons
		productalert/observer::process ( 3 PM )
			<config>
			...
				app/code/core/Mage/ProductAlert/etc/config.xml
				...
				<crontab>
				 <jobs>
				  <catalog_product_alert>
				   <schedule><cron_expr>0 3 * * *</cron_expr></schedule>
				    <run><model>productalert/observer::process</model></run>
				  </catalog_product_alert>
				 </jobs>
    				</crontab>
			</config>
		
		catalogrule/observer::dailyCatalogUpdate
		sitemap
		log_clean
		aggregate_sales_report*
		currency_rates_update


http://www.magentocommerce.com/boards/viewthread/228225/#t321657