improvement(sockets): increase buffer for connections (#695)

* increase sockets connection pool

* correct comment

apps/sim/db/index.ts

@@ -12,12 +12,12 @@ const connectionString = env.POSTGRES_URL ?? env.DATABASE_URL
  * Connection Pool Allocation Strategy
  *
  * Main App: 25 connections per instance
- * Socket Server: 3 connections total
+ * Socket Server: 5 connections (operations) + 2 connections (room manager) = 7 total
  *
  * With ~3-4 Vercel serverless instances typically active:
  * - Main app: 25 × 4 = 100 connections
- * - Socket server: 3 connections
- * - Buffer: 25 connections
+ * - Socket server: 7 connections total
+ * - Buffer: 21 connections
  * - Total: ~128 connections
  * - Supabase limit: 128 connections (16XL instance)
  */

apps/sim/socket-server/database/operations.ts

@@ -14,11 +14,11 @@ const connectionString = env.POSTGRES_URL ?? env.DATABASE_URL
 const socketDb = drizzle(
   postgres(connectionString, {
     prepare: false,
-    idle_timeout: 10, // Shorter idle timeout for socket operations
-    connect_timeout: 20, // Increase connection timeout for socket operations
-    max: 2, // Very small pool for socket server to avoid exhausting Supabase limit
-    onnotice: () => {}, // Disable notices
-    debug: false, // Disable debug for socket operations
+    idle_timeout: 10,
+    connect_timeout: 20,
+    max: 5,
+    onnotice: () => {},
+    debug: false,
   }),
   { schema }
 )

apps/sim/socket-server/rooms/manager.ts

@@ -13,8 +13,8 @@ const db = drizzle(
   postgres(connectionString, {
     prepare: false,
     idle_timeout: 15,
-    connect_timeout: 20, // Increase connection timeout for room operations
-    max: 1, // Minimal pool for room operations to conserve connections
+    connect_timeout: 20,
+    max: 2,
     onnotice: () => {},
   }),
   { schema }