Check this option if you want immediate effect to be shown after using FTP some files or user online editor to modify template files.
When enable module data cache, site block datas (latest blogs, latest albums., etc.) will be cached to increase access speed and reduce server load.
Usually these data will be updated automaticly at respective intervals and no need to update manually.
Check this option if you want to update it immediately.
Notice: all block cache need to be regenerated after clean cache, the server load will be very huge in a short period of time, so please process this operation when less visitors access your site.
Usually system cache can be updated automaticly after you change system settings and no need to update manually. Try this if your website encounters error in action.
Including network cache, user ranking cache, homepage cache.,etc.
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