The concept of Linux HugePages has existed for quite a while: for more than 10 years, introduced to Debian in 2007 with kernel version 2.6.23. Whilst a smaller page size is useful for general use, some memory intensive applications may gain performance by using bigger memory pages. By having bigger memory chunks available to […]Read more
In this post, I want to explore a way to establish 100,000 connections to MySQL. Not just idle connections, but executing queries.
100,000 connections. Is that really needed for MySQL, you may ask? Although it may seem excessive, I have seen a lot of different setups in customer deployments. Some deploy an application connection pool, […]
Percona Server for MySQL 8.0 comes with enterprise grade total data encryption features. However, there is always the question of how much overhead – or performance penalty – comes with the data decryption. As we saw in my networking performance post, SSL under high concurrency might be problematic. Is this the case for data […]Read more
MySQL 8.0.15 performs worse in sysbench oltp_read_write than MySQL 5.7.25
Initially I was testing group replication performance and was puzzled why MySQL 8.0.15 performs consistently worse than MySQL 5.7.25.
It appears that a single server instance is affected by a performance degradation.
My testing setup
Bare metal server provided by packet.net, instance size: c2.medium.x86
24 Physical Cores @ […]
Network is a major part of a database infrastructure. However, often performance benchmarks are done on a local machine, where a client and a server are collocated – I am guilty myself. This is done to simplify the setup and to exclude one more variable (the networking part), but with this we also miss […]Read more