Magento cache is turned off but still caching files

I am running magento 1.5.1 and when turning off caching for debugging, files are still being cached.

Can an开发者_如何学Pythonyone advise on how to fully disable the caching mechanism in magento?

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delete everything under var/cache/ to fully flush your file based cache. If your site is using APC, EACCELERATOR, MEMCACHED or other cache engines you might need to clear or disable those as well