Is ANALYZE TABLE Safe on a Busy MySQL Database Server?
Sometimes, there is a need to update the table and index statistics manually using the ANALYZE TABLE command. Without going further into the reasons for such a need, I wanted to refresh this subject in terms of overhead related to running the command on production systems. However, the overhead discussed here is unrelated to the usual cost of diving into table rows to gather statistics, which we c
Queries for Finding Poorly-Designed MySQL Schemas and How to Fix Them
If you watched Finding Poorly Designed Schemas and How to Fix Them you witnessed Marcos Albe use some very interesting queries. These queries let you find tables without primary keys, tables with non-integer primary keys, tables that do not use InnoDB, tables and indexes with the most latency, indexes that are 50% larger than the table, find duplicate indexes, and find unused indexes. As promised,
How to Choose the MySQL innodb_log_file_size
In this blog post, I’ll provide some guidance on how to choose the MySQL innodb_log_file_size. Like many database management systems, MySQL uses logs to achieve data durability (when using the default InnoDB storage engine). This ensures that when a transaction is committed, data is not lost in the event of crash or power loss. MySQL’s InnoDB storage engine uses a fixed size (circular) Redo log sp
ProxySQL 1.2.1 GA Release
The GA release of ProxySQL 1.2.1 is available. You can get it from https://github.com/sysown/proxysql/releases. There are also Docker images for Release 1.2.1: https://hub.docker.com/r/percona/proxysql/. ProxySQL is a high-performance proxy, currently for MySQL and its forks (like Percona Server and MariaDB). It acts as an intermediary for client requests seeking resources from the database. Proxy
How Apache Spark makes your slow MySQL queries 10x faster
In this blog post, we’ll discuss how to improve the performance of slow MySQL queries using Apache Spark. In my previous blog post, I wrote about using Apache Spark with MySQL for data analysis and showed how to transform and analyze a large volume of data (text files) with Apache Spark. Vadim also performed a benchmark comparing the performance of MySQL and Spark with Parquet columnar format (usi
Containing your logical backups: mydumper in docker
Even with software like Percona Xtrabackup, logical backups remain an important component of a thorough backup strategy. To gather a logical backup in a timely fashion we rely on a tool called mydumper. In the Percona Managed Services department we’re lucky enough to have one of the project’s most active contributors and many of the latest features and bug fixes have been released to satisfy some
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