1select @@global.shared_memory_base_name;
2@@global.shared_memory_base_name
3MYSQL_TMP_DIR/mysqld.1.sock
4select @@session.shared_memory_base_name;
5ERROR HY000: Variable 'shared_memory_base_name' is a GLOBAL variable
6show global variables like 'shared_memory_base_name';
7Variable_name	Value
8shared_memory_base_name	MYSQL_TMP_DIR/mysqld.1.sock
9show session variables like 'shared_memory_base_name';
10Variable_name	Value
11shared_memory_base_name	MYSQL_TMP_DIR/mysqld.1.sock
12select * from information_schema.global_variables where variable_name='shared_memory_base_name';
13VARIABLE_NAME	VARIABLE_VALUE
14SHARED_MEMORY_BASE_NAME	MYSQL_TMP_DIR/mysqld.1.sock
15select * from information_schema.session_variables where variable_name='shared_memory_base_name';
16VARIABLE_NAME	VARIABLE_VALUE
17SHARED_MEMORY_BASE_NAME	MYSQL_TMP_DIR/mysqld.1.sock
18set global shared_memory_base_name=1;
19ERROR HY000: Variable 'shared_memory_base_name' is a read only variable
20set session shared_memory_base_name=1;
21ERROR HY000: Variable 'shared_memory_base_name' is a read only variable
22