In my previous blog post, I had described the steps to perform an in-place upgrade for upgrading from MySQL 5.7 to MySQL 8.0. In this blog post, I will discuss about the considerations that needs to be taken into account while upgrading to MySQL 8.0
The general in-place upgrade requirement is that MySQL 8.0 will understand the disk image produced by MySQL 5.7. …
To quote book of all knowledge:
The Write Ahead Log (WAL) is one of the most important components of a database. All the changes to data files are logged in the WAL (called the redo log in InnoDB). This allows to postpone the moment when the modified pages are flushed to disk, still protecting from data losses.…
In this article I will explain the partial update optimizations for smaller (LOBs) in InnoDB. Small here qualifies the size of the modification and not the size of the LOB. For some background information about the partial update feature, kindly go through our previous posts on this (here, here and here).…
MySQL 8.0 General Availability was announced in April and it comes with a host of new features. The overview about the new features and improvements made in MySQL 8.0 can be found in the following blog.
The server can be upgraded by performing either an INPLACE upgrade or LOGICAL upgrade. …
MySQL 8.0.11 comes with a catalog of 5108 spatial reference systems (SRSs). 4628 projections (flat maps), 479 geographic (ellipsoidal) representations of Earth, and one Cartesian all-purpose abstract plane (SRID 0). And if for some reason that isn’t enough, we can create our own.…
MySQL has had spatial indexes for many years, but they have all been Cartesian (X and Y coordinates) indexes. MySQL 8.0 adds support for geographic (latitude-longitude) indexes. In an earlier blog post, I described how the feature works. In this post, we’ll go into the details of how to upgrade from 5.7 to 8.0 if you have spatial indexes.…
MySQL 8.0.11 comes with a catalog of 5108 spatial reference system (SRS) definitions. In a previous post, we covered the definitions of geographic SRSs. In this post we’ll go into the details of projected SRSs. (If you haven’t done so already, I suggest you read the previous post first.)
Projected SRSs are flat, Cartesian coordinate systems created by projecting points on (an oblate spheroidal model of) Earth onto a flat surface.…
MySQL 8.0.11 comes with a catalog of 5108 spatial reference system (SRS) definitions, and 479 of these are geographic. We usually just refer to them by SRID, but in this blog post we’ll dive into the details and try to understand the definition itself.…
In this article, I’ll explain about the multi version concurrency control (MVCC) of large objects (LOBs) design in the MySQL InnoDB storage engine. MySQL 8.0 has a new feature that allows users to partially update large objects, including the JSON documents. …