From 25b6efc8e835c66ce00edb1ac07ecab787a126eb Mon Sep 17 00:00:00 2001
From: Hanyang Ke <kehycs@foxmail.com>
Date: Sun, 19 Apr 2020 11:12:01 +0800
Subject: [PATCH] fix warning (#1988)

Signed-off-by: kehycs <kehycs@foxmail.com>
---
 core/src/metrics/Metrics.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src/metrics/Metrics.h b/core/src/metrics/Metrics.h
index 42f5ae4ba2..09df67596b 100644
--- a/core/src/metrics/Metrics.h
+++ b/core/src/metrics/Metrics.h
@@ -61,7 +61,7 @@ class CollectInsertMetrics : CollectMetricsBase {
         if (n_ > 0) {
             auto total_time = TimeFromBegine();
             double avg_time = total_time / n_;
-            for (int i = 0; i < n_; ++i) {
+            for (size_t i = 0; i < n_; ++i) {
                 Metrics::GetInstance().AddVectorsDurationHistogramOberve(avg_time);
             }
 
@@ -90,7 +90,7 @@ class CollectQueryMetrics : CollectMetricsBase {
     ~CollectQueryMetrics() {
         if (nq_ > 0) {
             auto total_time = TimeFromBegine();
-            for (int i = 0; i < nq_; ++i) {
+            for (size_t i = 0; i < nq_; ++i) {
                 server::Metrics::GetInstance().QueryResponseSummaryObserve(total_time);
             }
             auto average_time = total_time / nq_;