(Satya Bodapati) In my previous blog post, I explained the internals of the sorted index build process. The blog ended with saying “there is one disadvantage.”
Tag: Open Source
About MySQL and Indexes
(Frederic Descamps) MySQL supports different types of Indexes. They depend on the storage engine and on the type of data. This is the list of supported indexes:
Stored Functions and Temporary Tables are Not a Good Fit
(Tibor Korocz) In this blog post, I am going to show why we have to be careful with stored functions in select list, as a single query can cause thousands of queries in the background if we aren’t cautious.
MariaDB sys Schema
(Shinguz) The MySQL sys Schema is a cool thing and was mostly developed by Mark Leith and Jesper Wisborg Krogh from Oracle/MySQL.
Adaptive Hash Index on AWS Aurora
(Tibor Korocz) Recently I had a case where queries against Aurora Reader were 2-3 times slower than on the Writer node. In this blog post, we are going to discuss why.
Getting past 2400 threads with sysbench and dbdeployer for benchmarking MySQL 5.7.26
(Jean-François Gagné) I am currently running tests with sysbench and dbdeployer on a Google Cloud Platform Debian 9 instance. I ran into an interesting limit and lifting it was not straightforward.
pt-kill: How it Works
(Carlos Salguero) I receive many questions about errors being reported about pt-kill… and often those errors are not real.
What on Earth is a Split-Brain Scenario in a MySQL Database Cluster?
(Eric M. Stone) In this blog post we will define what a split-brain scenario means in a MySQL database cluster, and then explore how a Tungsten MySQL database cluster reacts to a split-brain situation.
Oops! – That SQL Query was not intended… Flashback
(Shinguz) It is Saturday night at 23:19. Time to go to bed after a hard migration day. Just a last clean-up query before finishing: Tap tap tap. Enter! – Oops!
Paginating the results of an SQL query
(Federico Razzoli) One of the trickiest problems in SQL is to query rows in tranches. This is typically needed in a website search, or in a dynamic catalogue where products appear as you scroll down.