MySQL

Checking Data Consistency for RDS for MySQL

data consistency RDS MySQL

MySQL for RDS and DBaaS, in general, are very controlled environments by the vendors, meaning that there are missing things like a SUPER grant for the root user (and any user in general). This has some implications on operations, one of them being the impossibility of running pt-table-checksum to verify data consistency between a […]

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ProxySQL Binary Search Solution for Rules

We sometimes receive challenging requests… this is a story about one of those times.
The customer has implemented a sharding solution and would like us to review alternatives or improvements. We analyzed the possibility of using ProxySQL as it looked to be a simple implementation. However, as we had 200 shards we had to implement […]

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ProxySQL Overhead — Explained and Measured

ProxySQL brings a lot of value to your MySQL infrastructures such as Caching or Connection Multiplexing but it does not come free — your database needs to go through additional processing traffic which adds some overhead. In this blog post, we’re going to discuss where this overhead comes from and measure such overhead. 
Types of […]

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More on Checkpoints in InnoDB MySQL 8

Recently I posted about checkpointing in MySQL, where MySQL showed interesting “wave” behavior.
Soon after Dimitri posted a solution with how to fix “waves,” and I would like to dig a little more into proposed suggestions, as there are some materials to process.
This post will be very heavy on InnoDB configuration, so let’s start with […]

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MySQL 8.0.19 InnoDB ReplicaSet Configuration and Manual Switchover

Manual Switchover

InnoDB ReplicaSet was introduced from MySQL 8.0.19. It works based on the MySQL asynchronous replication. Generally, InnoDB ReplicaSet does not provide high availability on its own like InnoDB Cluster, because with InnoDB ReplicaSet we need to perform the manual failover. AdminAPI includes the support for the InnoDB ReplicaSet. We can operate the InnoDB ReplicaSet […]

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