From 6bac1c2e344d2853a653163faa94dd3771ee7d4f Mon Sep 17 00:00:00 2001
From: rafapolo <rafael@extrapolo.com>
Date: Sun, 17 May 2026 11:24:16 +0200
Subject: [PATCH] Tune DuckDB connection settings for better S3 query
 performance

Add http_keep_alive, http_retries, preserve_insertion_order to _init_db().
Bump memory_limit from 4GB to 6GB to match available server RAM.
---
 auth.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/auth.py b/auth.py
index 391700f..97650fc 100644
--- a/auth.py
+++ b/auth.py
@@ -23,7 +23,10 @@ def _init_db():
         SET s3_url_style='path';
         SET enable_object_cache=true;
         SET threads=4;
-        SET memory_limit='4GB';
+        SET memory_limit='6GB';
+        SET preserve_insertion_order=false;
+        SET http_keep_alive=true;
+        SET http_retries=3;
     """)
     _con.execute("ATTACH '/app/data/basedosdados.duckdb' AS basedosdados (READ_ONLY)")