From d56328579ef8a4566081197b283b78d61931ae7d Mon Sep 17 00:00:00 2001
From: D3Hunter <jujj603@gmail.com>
Date: Fri, 5 Jan 2024 11:28:01 +0800
Subject: [PATCH] change

---
 br/pkg/lightning/config/config.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/br/pkg/lightning/config/config.go b/br/pkg/lightning/config/config.go
index c5f181614f971..5e7c96d62794d 100644
--- a/br/pkg/lightning/config/config.go
+++ b/br/pkg/lightning/config/config.go
@@ -332,6 +332,11 @@ func (l *Lightning) adjust(i *TikvImporter) {
 		if len(l.MetaSchemaName) == 0 {
 			l.MetaSchemaName = defaultMetaSchemaName
 		}
+		// RegionConcurrency > NumCPU is meaningless.
+		cpuCount := runtime.NumCPU()
+		if l.RegionConcurrency > cpuCount {
+			l.RegionConcurrency = cpuCount
+		}
 	}
 }