Function tryResizeHashTables

app/redis-6.2.6/src/server.c:1564–1569

If the percentage of used slots in the HT reaches HASHTABLE_MIN_FILL * we resize the hash table to save memory */

/* If the percentage of used slots in the HT reaches HASHTABLE_MIN_FILL
 * we resize the hash table to save memory */
void tryResizeHashTables(int dbid) {
    if (htNeedsResize(server.db[dbid].dict))
        dictResize(server.db[dbid].dict);
    if (htNeedsResize(server.db[dbid].expires))
        dictResize(server.db[dbid].expires);
}

/* Our hash table implementation performs rehashing incrementally while
 * we write/read from the hash table. Still if the server is idle, the hash