Performance question about consumer

[gaoxingliang]

Hi team,
I want to use the apisix integrated with customers to do the hmac-auth.
Is it will be a performance issue if I have about 10K consumers?
Will this cause a problem for etcd or something else. I see a lrucache is used in consumer code.

[gaoxingliang]

I wrote below java code to create about 100k consumers. and found:

• etcd cost about 270MB memory.
• apisix cost about 5G memory.
  and qps is same with previous less consumers.

package com.example.authcode;

import com.alibaba.fastjson2.*;
import kong.unirest.*;
import org.apache.commons.lang3.*;
import org.apache.http.*;

public class ApiSixTest {
    public static void main(String[] args) {

        int max = 100 * 1000;

        for (int i = 68999; i < max; i++) {
            JSONObject body = new JSONObject();
            String index = String.format("%08d", i);
            /**
             * {
             *     "plugins": {},          # Bound plugin
             *     "username": "name",     # Consumer name
             *     "desc": "hello world"   # Consumer desc
             * }
             */
            body.put("username", "u" + index);
            JSONObject plugins = new JSONObject();
            JSONObject hmac = new JSONObject();
            JSONObject meta = new JSONObject();
            meta.put("disable" , false);
            hmac.put("_meta", meta);
            hmac.put("access_key",
                    StringUtils.repeat(index, 3));
            hmac.put("algorithm", "hmac-sha256");
            hmac.put("encode_uri_params", false);
            hmac.put("secret_key",
                    StringUtils.repeat(index, 3));
            JSONArray signHeaders = new JSONArray();
            signHeaders.add("X-Provider-ID");
            hmac.put("signed_headers", signHeaders);
            hmac.put("validate_request_body", false);
            plugins.put("hmac-auth", hmac);
            body.put("plugins", plugins);
            String response = Unirest.put("http://192.168.102.222:62951/apisix/admin/consumers")
                    .header(HttpHeaders.CONTENT_TYPE, "application/json")
                    .header("X-API-KEY", "edd1c9f034335f136f87ad84b625c8f1")
                    .body(body)
                    .asString().getBody();
            System.out.println(response);
        }

    }
}