Function getKeyFreqs

app/redis-6.2.6/src/redis-cli.c:7790–7824

}

static void getKeyFreqs(redisReply *keys, unsigned long long *freqs) {
    redisReply *reply;
    unsigned int i;

    /* Pipeline OBJECT freq commands */
    for(i=0;i<keys->elements;i++) {
        const char* argv[] = {"OBJECT", "FREQ", keys->element[i]->str};
        size_t lens[] = {6, 4, keys->element[i]->len};
        redisAppendCommandArgv(context, 3, argv, lens);
    }

    /* Retrieve freqs */
    for(i=0;i<keys->elements;i++) {
        if(redisGetReply(context, (void**)&reply)!=REDIS_OK) {
            sds keyname = sdscatrepr(sdsempty(), keys->element[i]->str, keys->element[i]->len);
            fprintf(stderr, "Error getting freq for key '%s' (%d: %s)\n",
                keyname, context->err, context->errstr);
            sdsfree(keyname);
            exit(1);
        } else if(reply->type != REDIS_REPLY_INTEGER) {
            if(reply->type == REDIS_REPLY_ERROR) {
                fprintf(stderr, "Error: %s\n", reply->str);
                exit(1);
            } else {
                sds keyname = sdscatrepr(sdsempty(), keys->element[i]->str, keys->element[i]->len);
                fprintf(stderr, "Warning: OBJECT freq on '%s' failed (may have been deleted)\n", keyname);
                sdsfree(keyname);
                freqs[i] = 0;
            }
        } else {
            freqs[i] = reply->integer;
        }
        freeReplyObject(reply);
    }
}

#define HOTKEYS_SAMPLE 16
static void findHotKeys(void) {