From 8816ff009d078f06bf0d33f219dcd50d7edb14c9 Mon Sep 17 00:00:00 2001
From: Jean-Marie Renouard <jmrenouard@gmail.com>
Date: Mon, 7 Jan 2019 10:58:30 +0100
Subject: [PATCH] Update INTERNALS.md

---
 INTERNALS.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/INTERNALS.md b/INTERNALS.md
index 0b9aeba..f88ed55 100644
--- a/INTERNALS.md
+++ b/INTERNALS.md
@@ -215,6 +215,11 @@
    * MySQL needs 1 instance per 1Go of Buffer Pool
    * innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
    * innodb_buffer_pool instances must be equals or lower than 64
+   
+   - However, this variable is already set to default value 1.
+   - If you read note in MySQL 5.6 Reference Manual:
+    - A bug in MySQL 5.6 causes SHOW VARIABLES to report an innodb_buffer_pool_instances value of 8 when innodb_buffer_pool_size is less than 1GB and only one buffer pool instance is present (Bug #18343670).
+
 * InnoDB Buffer Pool Usage
    * If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
 * InnoDB Buffer Pool Log Size