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When to migrate from information schema to Performance Schema?
The Performance Schema tables are intended to replace the INFORMATION_SCHEMA tables, which are deprecated as of MySQL 5.7.6 and are removed in MySQL 8.0. This section describes the intended migration path away from the INFORMATION_SCHEMA system and status variable tables to the corresponding Performance Schema tables.
How is the Performance Schema implemented in MySQL?
The MySQL Performance Schema is a feature for monitoring MySQL Server execution at a low level. The Performance Schema has these characteristics: The Performance Schema provides a way to inspect internal execution of the server at runtime. It is implemented using the PERFORMANCE_SCHEMA storage engine and the performance_schema database.
What’s the easiest way to create a database schema?
IMHO, the easiest solution is to just open the dump in a regular text editor and copy the CREATE TABLE statements into another file. I would not even care about doing anything else. If that’s not an option for whatever the reason, you can simply create a new dump and this time separate structure and data in two files.
What is the information schema system and status variable table?
The INFORMATION_SCHEMA has tables that contain system and status variable information (see Section 24.3.11, “The INFORMATION_SCHEMA GLOBAL_VARIABLES and SESSION_VARIABLES Tables”, and Section 24.3.10, “The INFORMATION_SCHEMA GLOBAL_STATUS and SESSION_STATUS Tables” ).
What is the Performance Schema in MySQL 5.7.6?
As of MySQL 5.7.6, the Performance Schema includes these tables as new sources of system and status variable information: MySQL 5.7.6 also adds a show_compatibility_56 system variable to control how the server makes system and status variable information available. When show_compatibility_56 is ON, compatibility with MySQL 5.6 is enabled.
How many views are there in MySQL SYS schema?
Building on both performance_schema and information_schema, the sys_schema provides a powerful collection of user-friendly views in a read-only database and is fully enabled in Azure Database for MySQL version 5.7. There are 52 views in the sys_schema, and each view has one of the following prefixes:
What are the usage patterns of SYS _ schema?
Now let’s look at some common usage patterns of the sys_schema. To begin with, we’ll group the usage patterns into two categories: Performance tuning and Database maintenance. IO is the most expensive operation in the database. We can find out the average IO latency by querying the sys.user_summary_by_file_io view.