FOSSASIA Apr 2023

Some times it’s important to know the size of a transaction, especially when you plan to migrate to a HA solution where by default transactions have a limited size to guarantee an optimal behavior of the cluster.

Today we will see the different possibilities to have an idea of the size of transactions.

First we need to split the transaction in two types:

• those generating data (writes, like insert, delete and update, DML)
• those only ready data (select, DQL)

To implement High Availability, only the first category is important.

Size of DML

To know the size of a DML transaction, the only possibility we have is to parse the binary log (or query the binlog event).

We need to check the binlog event from the binlog file and then calculate its size. To illustrate this, let’s try to find the transaction identified by a specific GTID: …

In this article you will learn how to retrieve the size of a transaction, DML or DQL in MySQL.

MySQL HeatWave on AWS is now available in AWS Asia Pacific (Tokyo) region MySQL HeatWave on AWS is now available in Japan Tokyo region. The new region enables customers with applications deployed in the Tokyo region to: Minimize network latency between the application and database, enhancing the user experience on the application Reduce the high […]

MySQL HeatWave on AWS is now available in AWS Asia Pacific (Tokyo) region

Some times it’s important to know the size of a transaction, especially when you plan to migrate to a HA solution where by default transactions have a limited size to guarantee an optimal behavior of the cluster. Today we will see the different possibilities to have an idea of the size of transactions. First we […]

When you connect to a server (or cluster) using a TCP proxy level 7, also referred to as an application-level or Layer 7 proxy (highest level of the OSI model), the application doesn’t connect directly to the back-end server(s). The proxy usually understands the protocol used and can eventually take some decisions or even change the request.

The problem when using such proxy (like HA Proxy, ProxySQL and MySQL Router) is that the server doesn’t really know from where the client is connecting. The server sees the IP address of the proxy/router as the source IP of the client.

HA Proxy initially designed the Proxy Protocol, a simple protocol that allows a TCP connection to transport proxy-related information between the client, the proxy server and the destination server. The main purpose of the Proxy Protocol is then to preserve the client’s original IP address (with some others metadata). See …

When you connect to a server (or cluster) using a TCP proxy level 7, also referred to as an application-level or Layer 7 proxy (highest level of the OSI model), the application doesn’t connect directly to the back-end server(s). The proxy usually understands the protocol used and can eventually take some decisions or even change […]

In this article you learn how to retrieve the original client's IP when using MySQL Router to connect to MySQL Server.

Table of contents:

1. Introduction
2. Common reasons for switching the primary node
3. Primary Promotion and its importance
4. Methods for switching the primary node
5. …