Revert "Add PhpArrayAdapter to cache metadata" #1255
Merged
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Reverts #1196
Few issues popped up and looks like at least #1251 is not very solvable on our side, as PHPArray cache is not designed to be modified, which includes deleting it as well. #1249 is most likely tricky to solve as well.
This decision came from both me and @dmaicher. We need to rollback this fast, because it introduces deprecation of the option we suggested to remove. If we rollback it after lot of people removed their metadata cache configurations, they will experience regressed performance.
We can always reintroduce this thing later, with more bug-prove solution.