From 7d8f9b0978760c59c363cee96bda4203becbab3c Mon Sep 17 00:00:00 2001
From: LHHDZ <changlin.shi@ly.com>
Date: Sat, 22 Jul 2023 21:24:46 +0800
Subject: [PATCH]  remote-write receiver: reuse 'ref' to optimize multiple
 samples for same series (#12580)

reuse 'ref' to optimize multi samples processing efficiency

Signed-off-by: changlin.shi <changlin.shi@ly.com>
---
 storage/remote/write_handler.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/storage/remote/write_handler.go b/storage/remote/write_handler.go
index ac4caa619b..96d8cbd903 100644
--- a/storage/remote/write_handler.go
+++ b/storage/remote/write_handler.go
@@ -119,8 +119,9 @@ func (h *writeHandler) write(ctx context.Context, req *prompb.WriteRequest) (err
 			samplesWithInvalidLabels++
 			continue
 		}
+		var ref storage.SeriesRef
 		for _, s := range ts.Samples {
-			_, err = app.Append(0, labels, s.Timestamp, s.Value)
+			ref, err = app.Append(ref, labels, s.Timestamp, s.Value)
 			if err != nil {
 				unwrappedErr := errors.Unwrap(err)
 				if unwrappedErr == nil {