Function RM_SetLFU

app/redis-6.2.6/src/module.c:8857–8863

Set the key access frequency. only relevant if the server's maxmemory policy * is LFU based. * The frequency is a logarithmic counter that provides an indication of * the access frequencyonly (must be <= 255). * returns REDISMODULE_OK if the LFU was updated, REDISMODULE_ERR otherwise. */

 * the access frequencyonly (must be <= 255).
 * returns REDISMODULE_OK if the LFU was updated, REDISMODULE_ERR otherwise. */
int RM_SetLFU(RedisModuleKey *key, long long lfu_freq) {
    if (!key->value)
        return REDISMODULE_ERR;
    if (objectSetLRUOrLFU(key->value, lfu_freq, -1, 0, 1))
        return REDISMODULE_OK;
    return REDISMODULE_ERR;
}

/* Gets the key access frequency or -1 if the server's eviction policy is not
 * LFU based.