[TYPO3-core] RFC: #7612: cannot clear extension's FE cache from Backend

[Rupert Germann]

Steffen Kamper wrote:
> Problem:
> Clearing all caches is meant for "all" cache tables, that means all system
> tables start with cache_*
> Actually only 3 of them are cleared, remaining tables not cleared are
 
> - cache_extensions
> - cache_imagesizes
> - cache_md5params

Steffen, 
(and the other guys who wrote comments to bug:7612)

clearing 
- cache_extensions
- cache_imagesizes
- cache_md5params

every time when "clear all cache" is clicked !??!

do you have an idea what these tables contain?

f.i.: clearing cache md5params would destroy ALL simStatic urls,
simFilenames and RDCT redirects.

clearing cache_extensions would make the extmanager unusable until a new
extlist is fetched from TER

and clearing cache_imagesizes would cause a lot of unneeded imagemagick
calls because the size informations have to be fetched again after clearing

there are good reasons why this tables had been excluded from clearing and
this has to stay like it is.



concerned greets
rupert