The MySQL Database

Wiki > The Backend System > System components > The MySQL database

General Command Line Commands

Using the MySQL Command Line Client

List the databases available

show databases;

Set the database to use

use database_name;

List the tables in the current database

show tables;

Display data from a table

select * from table_name;

The Tables

iocdb

• ioc - the list of all IOCs
• iocenv - lists the environment variables for each IOC
• iocrt - shows which IOCs are running
• pvinfo - information about each PV
• pvs - the list of PVs and their type

exp_data

• experiment
• experimentteams
• role
• user

Configuration

The mysql database runs as a service; details can be accessed by running services.msc. It will show in the properties of the service where the configuration file is. In general this should be in C:\Instrument\var\mysql\my.ini (however on some systems it is in c:\ProgramData\MySQL\MySQL Server 5.6\my.ini). The contents of this file should be for the server_type=3 this sets up the memory etc to be of an acceptable value. The most telling parameter in this file for memory management is probably innodb_buffer_pool_size=512M.

To restart mysql right click on the service and click restart. Note that a running IBEX instrument seems to have some problems with this; so will also need to be restarted (block server said Error executing command on database: Unable to get connection from pool: ).