diff --git a/.env.example b/.env.example
index ee93ff0..5c93756 100644
--- a/.env.example
+++ b/.env.example
@@ -16,7 +16,8 @@
 # ---- PostgreSQL ----
 DB_USER=ems_user
 DB_PASSWORD=change_me_strong_password
-
+# Limit současných připojení k DB (deploy/docker-compose + kořenové docker-compose). Výchozí v compose je 300.
+# POSTGRES_MAX_CONNECTIONS=300
 # ---- PostgREST ----
 POSTGREST_JWT_SECRET=change_me_jwt_secret_min_32_chars
 # PostgREST anonymní role (viz db/migration/V009__postgrest_roles.sql + R__z_postgrest_ems_anon_grants.sql).
diff --git a/deploy/docker-compose.yml b/deploy/docker-compose.yml
index 5aa1036..aa2ec68 100644
--- a/deploy/docker-compose.yml
+++ b/deploy/docker-compose.yml
@@ -10,6 +10,11 @@ services:
   db:
     image: timescale/timescaledb:2.26.1-pg18
     restart: unless-stopped
+    # Výchozí max_connections=100 snadno nestačí (PostgREST, backend, psql, IDE, MCP). Zvýšení přes .env.
+    command:
+      - postgres
+      - -c
+      - max_connections=${POSTGRES_MAX_CONNECTIONS:-100}
     environment:
       POSTGRES_DB: ems
       POSTGRES_USER: ${DB_USER}
diff --git a/docker-compose.yml b/docker-compose.yml
index 822e47f..bf1cceb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,6 +3,10 @@ services:
   db:
     image: timescale/timescaledb:2.26.1-pg18  
     restart: unless-stopped
+    command:
+      - postgres
+      - -c
+      - max_connections=${POSTGRES_MAX_CONNECTIONS:-300}
     environment:
       POSTGRES_DB: ems
       POSTGRES_USER: ${DB_USER}