From d1764c86247578f989c5d15b5b0aee44efc5e1e8 Mon Sep 17 00:00:00 2001
From: Claire McGinty <clairem@spotify.com>
Date: Tue, 11 Aug 2026 15:43:37 -0400
Subject: [PATCH] Lower row group size default to 512MB

---
 scio-parquet/src/main/resources/core-site.xml | 4 ++--
 scio-smb/src/main/resources/core-site.xml     | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/scio-parquet/src/main/resources/core-site.xml b/scio-parquet/src/main/resources/core-site.xml
index 12b53dd94e..cf61a708fd 100644
--- a/scio-parquet/src/main/resources/core-site.xml
+++ b/scio-parquet/src/main/resources/core-site.xml
@@ -13,9 +13,9 @@
     </description>
   </property>
   <property>
-    <!-- 1 GiB blocks -->
+    <!-- 512 MB blocks -->
     <name>parquet.block.size</name>
-    <value>1073741824</value>
+    <value>536870912</value>
   </property>
   <property>
     <!-- This defaults to SEQUENTIAL in GoogleCloudStorageReadOptions -->
diff --git a/scio-smb/src/main/resources/core-site.xml b/scio-smb/src/main/resources/core-site.xml
index 12b53dd94e..cf61a708fd 100644
--- a/scio-smb/src/main/resources/core-site.xml
+++ b/scio-smb/src/main/resources/core-site.xml
@@ -13,9 +13,9 @@
     </description>
   </property>
   <property>
-    <!-- 1 GiB blocks -->
+    <!-- 512 MB blocks -->
     <name>parquet.block.size</name>
-    <value>1073741824</value>
+    <value>536870912</value>
   </property>
   <property>
     <!-- This defaults to SEQUENTIAL in GoogleCloudStorageReadOptions -->