46409 nginx 5000 workers, 30 db con, app .4GB, db 1.8GB

---- Requests ------------------------------------------------------------------
> Global                                                   (OK=114654 KO=169   )
> criação                                                  (OK=54634  KO=0     )
> busca inválida                                           (OK=4190   KO=0     )
> busca válida                                             (OK=9590   KO=0     )
> consulta                                                 (OK=46240  KO=169   )
---- Errors --------------------------------------------------------------------
> status.find.in([200, 209], 304), found 404                        169 (100,0%)

Simulation RinhaBackendSimulation completed in 211 seconds
================================================================================
---- Global Information --------------------------------------------------------
> request count                                     114823 (OK=114654 KO=169   )
> min response time                                      0 (OK=0      KO=5000  )
> max response time                                   6225 (OK=6225   KO=5273  )
> mean response time                                   490 (OK=483    KO=5081  )
> std deviation                                       1048 (OK=1034   KO=43    )
> response time 50th percentile                         52 (OK=51     KO=5083  )
> response time 75th percentile                        247 (OK=244    KO=5091  )
> response time 95th percentile                       3306 (OK=3280   KO=5176  )
> response time 99th percentile                       4571 (OK=4477   KO=5194  )
> mean requests/sec                                541.618 (OK=540.821 KO=0.797 )
---- Response Time Distribution ------------------------------------------------
> t < 800 ms                                         95653 ( 83%)
> 800 ms <= t < 1200 ms                               3494 (  3%)
> t >= 1200 ms                                       15507 ( 14%)
> failed                                               169 (  0%)
---- Errors --------------------------------------------------------------------
> status.find.in([200, 209], 304), found 404                        169 (100,0%)
================================================================================

* Connection #0 to host localhost left intact
46409

docker-compose.yml

@@ -6,23 +6,23 @@ services:
     environment:
       HTTP_PORT: 8080
       DB_HOST: localhost
-      MAX_CONNECTIONS: 10
+      MAX_CONNECTIONS: 30
       ACQUIRE_TIMEOUT: 5
     depends_on:
       - db
     deploy:
       resources:
         limits:
           cpus: '0.15'
-          memory: '0.3GB'
+          memory: '0.4GB'
     network_mode: "host"
 
   api02:
     <<: *api
     environment:
       HTTP_PORT: 8081
       DB_HOST: localhost
-      MAX_CONNECTIONS: 10
+      MAX_CONNECTIONS: 30
       ACQUIRE_TIMEOUT: 5
 
   nginx: # Load Balancer
@@ -54,4 +54,4 @@ services:
       resources:
         limits:
           cpus: '1'
-          memory: '2GB'
+          memory: '1.8GB'

nginx.conf

@@ -2,7 +2,7 @@ worker_processes auto;
 
 events {
     use epoll;
-    worker_connections 10000;
+    worker_connections 5000;
 }
 http {
     access_log off;
@@ -11,7 +11,7 @@ http {
         server localhost:8080;
         server localhost:8081;
         keepalive 320;
-        keepalive_requests 10000;
+        keepalive_requests 5000;
     }
     server {
         listen 9999;