From 6f3ec723b12338894a4519f39b0502d5544efbe1 Mon Sep 17 00:00:00 2001 From: Markus Makela Date: Tue, 29 Sep 2015 10:23:04 +0300 Subject: [PATCH] Cleaned up Limitations --- Documentation/About/Limitations.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Documentation/About/Limitations.md b/Documentation/About/Limitations.md index 4677640a9..ec0d7f357 100644 --- a/Documentation/About/Limitations.md +++ b/Documentation/About/Limitations.md @@ -10,8 +10,6 @@ This section describes the limitations that are common to all configuration of p Compression is not included in MySQL server handshake -## Limitations with MySQL Master/Slave Replication monitoring - ## Limitations with Galera Cluster Monitoring Master selection is based only on MIN(wsrep_local_index), no other server parameter. @@ -35,7 +33,9 @@ In master-slave replication cluster also read-only queries are routed to master * statement includes a stored procedure, or an UDF call ### Limitations in client session handling + Some of the queries that client sends are routed to all backends instead of sending them just to one of server. These queries include `USE ` and `SET autocommit=0` among many others. Readwritesplit sends a copy of these queries to each backend server and forwards the master's reply to the client. Below is a list of MySQL commands which are classified as session commands : + ``` COM_INIT_DB (USE creates this) @@ -90,4 +90,4 @@ Most imaginable reasons are related to replication lag but it could be possible ## Authentication Related Limitations -MySQL old passwords are not supported +MySQL old style passwords are not supported. MySQL versions 4.1 and newer use a new authentication protocol which does not support pre-4.1 style passwords.