Function emptyDbAsync

app/redis-6.2.6/src/lazyfree.c:203–209

Empty a Redis DB asynchronously. What the function does actually is to * create a new empty set of hash tables and scheduling the old ones for * lazy freeing. */

 * create a new empty set of hash tables and scheduling the old ones for
 * lazy freeing. */
void emptyDbAsync(redisDb *db) {
    dict *oldht1 = db->dict, *oldht2 = db->expires;
    db->dict = dictCreate(&dbDictType,NULL);
    db->expires = dictCreate(&dbExpiresDictType,NULL);
    atomicIncr(lazyfree_objects,dictSize(oldht1));
    bioCreateLazyFreeJob(lazyfreeFreeDatabase,2,oldht1,oldht2);
}

/* Release the radix tree mapping Redis Cluster keys to slots asynchronously. */
void freeSlotsToKeysMapAsync(rax *rt) {