For the (i18n) and the (Domain) modules:
Enable
[x] Do not store the cache file path in the database
[x] Flush all sites caches in this database (singe db, multi-site)
Disable
[ ] Only allow ASCII characters in path
Enable XML & AJAX/JSON caches
Enable
[x] Cache .xml & /feed
[x] Cache ajax/json
To Use the Cron Crawler:
Enable
[x] Overwrite the cached file if it already exits
[x] Expire content in DB, do not flush file.
[x] Enable the cron crawler