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Kedar VaijanapurkarIn current times, there is a high degree of focus on ensuring the availability and recovery of your production data. This can be challenging at times when using DBaaS solutions in the public cloud space, for example, when using AWS Aurora. Relying solely on a single cloud provider for database services can pose significant risks. […]
pt-online-schema-change is an amazing tool for assisting in table modifications in cases where ONLINE ALTER is not an option. But if you have foreign keys, this could be an interesting and important read for you. Tables with foreign keys are always complicated, and they have to be handled with care. The use case I am […]
This blog was originally published in June of 2023 and updated in April of 2024. As a MySQL database administrator, keeping a close eye on the performance of your MySQL server is crucial to ensure optimal database operations. A monitoring tool like Percona Monitoring and Management (PMM) is a popular choice among open source options […]
A quick configuration change may do the trick in improving the performance of your AWS RDS for MySQL instance. Here, we will discuss a notable new feature in Amazon RDS, the Dedicated Log Volume (DLV), that has been introduced to boost database performance. While this discussion primarily targets MySQL instances, the principles are also relevant to […]
During an interview or while having general discussions, I have found some funny responses that can be easily classified as “Wrong Answers,” but at times, they’re thought-provoking or involve a deep meaning within. This blog is regarding some of the usual MySQL database conversations and responses, which can appear “wrong” or “funny,” but there’s actually […]
As a MySQL database administrator, you’re likely familiar with the SHOW REPLICA STATUS command. It is an important command for monitoring the replication status on your MySQL replicas. However, its output can be overwhelming for beginners, especially regarding the binary log coordinates. I have seen confusion amongst new DBAs on which binary log file and […]
This blog post explains the error Cannot change column type INPLACE for a VARCHAR column and offers solution to perform the ALTER operation.
During the early stages of my career, I was captivated by the theories and concepts surrounding foreign keys and how they empowered us to maintain data integrity. However, in practical application, I have found them to be quite challenging to manage. I am sure you’re a champion DBA, but I keep my distance from foreign […]
Indexes are crucial for optimizing query execution times in databases, but having an excessive number of indexes, or redundant ones, can negatively impact performance. While pt-duplicate-key-checker is the go-to tool for identifying duplicate or redundant indexes in MySQL, it may not catch all duplicates. In this blog post, we’ll put ourselves to the test and […]
A large table is a pain for many reasons as long as it is in a system. And as if that’s not enough, it is also a difficult task to get rid of it. In this post, we will understand why it is a pain to do this operation and what we can do about […]
As a best practice before dropping a large table in MySQL, pt-archiver can be used to delete all the records in batches. This helps to avoid a situation where your server may get stalled under certain circumstances. I recently read a comment from a user saying “The pt-archiver is not working as expected! It is […]