From dd88083db70df339c336db14322f7c08818eee43 Mon Sep 17 00:00:00 2001
From: "cai.zhang" <cai.zhang@zilliz.com>
Date: Mon, 6 Dec 2021 15:23:41 +0800
Subject: [PATCH] Use read lock when only read the var (#12711)

Signed-off-by: Cai.Zhang <cai.zhang@zilliz.com>
---
 internal/querynode/segment.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/internal/querynode/segment.go b/internal/querynode/segment.go
index 9ce0de7bfa..04480e0e7a 100644
--- a/internal/querynode/segment.go
+++ b/internal/querynode/segment.go
@@ -471,8 +471,8 @@ func (s *Segment) getIndexName(fieldID int64) string {
 }
 
 func (s *Segment) getIndexID(fieldID int64) UniqueID {
-	s.paramMutex.Lock()
-	defer s.paramMutex.Unlock()
+	s.paramMutex.RLock()
+	defer s.paramMutex.RUnlock()
 	if _, ok := s.indexInfos[fieldID]; !ok {
 		return -1
 	}