WP_SQLITE_OBJECT_CACHE_DB_FILE partially working | WordPress.org

I added this into wp-config.php

define( 'WP_SQLITE_OBJECT_CACHE_DB_FILE', '/tmp/mysite-object-cache.sqlite' );

one .sqlite file under /tmp/ does appear (with random salt in the middle of the file name), but it’s a small file, the big files located under wp-content/ are still growing. There are 4 sqlite related files under wp-content/ with old names:

.ht.object-cache.salt.sqlite

.ht.object-cache.salt.sqlite-shm

.ht.object-cache.salt.sqlite-wal

.ht.object-cache.sqlite

How can I move all of them to /tmp/?

Thanks