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################### mysql-test\t\key_buffer_size_func.test ####################
# #
# Variable Name: key_buffer_size #
# Scope: GLOBAL #
# Access Type: Dynamic #
# Data Type: numeric #
# Default Value: 131072 #
# Range:8-4294967295 #
# #
# #
# Creation Date: 2008-03-07 #
# Author: Salman Rawala #
# #
# Description: Test Cases of Dynamic System Variable key_buffer_size #
# that checks the functionality of this variable #
# #
# Reference: #
# http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html #
# #
###############################################################################
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
#########################
# Creating new table #
#########################
--echo ## Creating new table t1 ##
CREATE TABLE t1
(
id INT NOT NULL AUTO_INCREMENT,
PRIMARY KEY (id),
rollno INT NOT NULL,
name VARCHAR(30)
);
SET @start_value= @@global.key_buffer_size;
FLUSH STATUS;
--echo '#--------------------FN_DYNVARS_055_01-------------------------#'
########################################################################
# Setting initial value of key_buffer_size, inserting some rows
# & creating 2 new connections
########################################################################
--echo ## Setting initial value of variable to 131072 ##
SET @@global.key_buffer_size = 131072;
--echo ## Creating two new connections ##
CONNECT (test_con1,localhost,root,,);
CONNECT (test_con2,localhost,root,,);
--echo '#--------------------FN_DYNVARS_055_02-------------------------#'
###############################################################################
# Verifying initial behavior of variable by concatinating values greater than 4
###############################################################################
--echo ## Connecting with connection test_con1 ##
CONNECTION test_con1;
SELECT @@global.key_buffer_size;
--echo ## Inserting some rows in table ##
INSERT INTO t1(rollno, name) VALUES(1, 'Record_1');
INSERT INTO t1(rollno, name) VALUES(2, 'Record_2');
INSERT INTO t1(rollno, name) VALUES(1, 'Record_3');
INSERT INTO t1(rollno, name) VALUES(3, 'Record_4');
INSERT INTO t1(rollno, name) VALUES(1, 'Record_5');
INSERT INTO t1(rollno, name) VALUES(3, 'Record_6');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_7');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_8');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_9');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_10');
--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';
--echo ## Switching to connection test_con2 ##
connection test_con2;
--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';
--echo ## Connecting with connection test_con1 ##
CONNECTION test_con1;
--echo ## Inserting some rows in table ##
INSERT INTO t1(rollno, name) VALUES(5, 'Record_11');
INSERT INTO t1(rollno, name) VALUES(6, 'Record_12');
INSERT INTO t1(rollno, name) VALUES(5, 'Record_13');
INSERT INTO t1(rollno, name) VALUES(7, 'Record_14');
INSERT INTO t1(rollno, name) VALUES(5, 'Record_15');
INSERT INTO t1(rollno, name) VALUES(7, 'Record_16');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_17');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_18');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_19');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_20');
--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';
############################################################
# Disconnecting all connection & dropping table #
############################################################
--echo ## Dropping table ##
DROP TABLE IF EXISTS t1;
--echo ## Disconnecting both the connections ##
DISCONNECT test_con2;
DISCONNECT test_con1;
connection default;
SET @@global.key_buffer_size= @start_value;
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