From 782934ddb4304df36593ee09420a9f89a8645e96 Mon Sep 17 00:00:00 2001
From: SataQiu <1527062125@qq.com>
Date: Thu, 3 Jan 2019 13:21:42 +0800
Subject: [PATCH] add content_zh/help/faq/telemetry/no-tracing.md (#2971)

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 content_zh/help/faq/telemetry/no-tracing.md | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 content_zh/help/faq/telemetry/no-tracing.md

diff --git a/content_zh/help/faq/telemetry/no-tracing.md b/content_zh/help/faq/telemetry/no-tracing.md
new file mode 100644
index 0000000000..48d3c2b759
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+++ b/content_zh/help/faq/telemetry/no-tracing.md
@@ -0,0 +1,9 @@
+---
+title: 请求没有被追踪
+weight: 20
+---
+
+从 Istio 1.0.3 开始，使用 helm chart 安装的 Istio，其默认追踪采样率已经降低到 1%。
+这意味着 Istio 捕获的 100 个追踪实例中只有 1 个将被报告给追踪后端。
+`istio-demo.yaml` 文件中的采样率仍设为 100%。
+有关如何设置采样率的更多信息，请参见[本节](/docs/tasks/telemetry/distributed-tracing)。