From 1ac7c8f14dc7c1c81e8e64c404e1f1344cf5a330 Mon Sep 17 00:00:00 2001
From: Yongqiang YANG <98214048+dataroaring@users.noreply.github.com>
Date: Mon, 18 Sep 2023 20:22:03 +0800
Subject: [PATCH] [improvement](scan_queue_mem_limit) scan queue mem limit is
 so small for (#24553)

a wide table

Users rarely set scan_queue_mem_limit, so it almost often works as 2G/20. However,
somecases we need set it to a larger value, especially for insrt into
select from a wide table.
---
 .../src/main/java/org/apache/doris/qe/SessionVariable.java      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
index 1476ce6d05..1cc43c8dc4 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
@@ -1551,7 +1551,7 @@ public class SessionVariable implements Serializable, Writable {
     }
 
     public void setMaxScanQueueMemByte(long scanQueueMemByte) {
-        this.maxScanQueueMemByte = Math.min(scanQueueMemByte, maxExecMemByte / 20);
+        this.maxScanQueueMemByte = Math.min(scanQueueMemByte, maxExecMemByte / 2);
     }
 
     public boolean isSqlQuoteShowCreate() {