From b3bddbe91c329cea0ffa3159e1b5f799a476ccb8 Mon Sep 17 00:00:00 2001
From: Tatsuo Ishii <ishii@sraoss.co.jp>
Date: Tue, 13 Apr 2021 13:28:38 +0900
Subject: [PATCH] Doc: enhance show pool_cache manual.

Add note that not all columns shows meaningful values when cache
storage is memcached.
---
 doc.ja/src/sgml/ref/show_pool_cache.sgml | 12 ++++++++++++
 doc/src/sgml/ref/show_pool_cache.sgml    |  8 ++++++++
 2 files changed, 20 insertions(+)

diff --git a/doc.ja/src/sgml/ref/show_pool_cache.sgml b/doc.ja/src/sgml/ref/show_pool_cache.sgml
index a977b137a..7867236b4 100644
--- a/doc.ja/src/sgml/ref/show_pool_cache.sgml
+++ b/doc.ja/src/sgml/ref/show_pool_cache.sgml
@@ -64,6 +64,18 @@
    </programlisting>
 
   </para>
+
+  <note>
+   <para>
+<!--
+    If the cache storage is <literal>memcached</literal>, values for
+    all columns except num_cache_hits, num_selects and cache_hit_ratio
+    show 0.
+-->
+    キャッシュストレージが<literal>memcached</literal>のときは、num_cache_hits, num_selects and cache_hit_ratio以外の列の値は0になります。
+   </para>
+  </note>
+
  </refsect1>
 
 </refentry>
diff --git a/doc/src/sgml/ref/show_pool_cache.sgml b/doc/src/sgml/ref/show_pool_cache.sgml
index c085a4d58..a90838f2c 100644
--- a/doc/src/sgml/ref/show_pool_cache.sgml
+++ b/doc/src/sgml/ref/show_pool_cache.sgml
@@ -54,6 +54,14 @@
    </programlisting>
 
   </para>
+
+  <note>
+   <para>
+    If the cache storage is memcached, values for all columns except
+    num_cache_hits, num_selects and cache_hit_ratio show 0.
+   </para>
+  </note>
+
  </refsect1>
 
 </refentry>
-- 
2.39.5