############# mysql-test\t\thread_cache_size_func.test ##########################
#                                                                               #
# Variable Name: thread_cache_size                                              #
# Scope: SESSION                                                                #
# Access Type: Dynamic                                                          #
# Data Type: Enumeration                                                        #
# Default Value: 0                                                              #
# Values:      0-16384                                                          #
#                                                                               #
#                                                                               #
# Creation Date: 2008-03-02                                                     #
# Author:  Sharique Abdullah                                                    #
#                                                                               #
# Modified: HHunger 2008-08-27 Reduced test to needed function and inserted     #
#                              wait-loops                                       #
#                                                                               #
# Description: Test Cases of Dynamic System Variable "thread_cache_size"        #
#              that checks behavior of this variable in the following ways      #
#              * Functionality based on different values                        #
#                                                                               #
# Reference:                                                                    #
#   http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html         #
#                                                                               #
#################################################################################

#
# Setup
#


--source include/one_thread_per_connection.inc
SET @global_thread_cache_size = @@GLOBAL.thread_cache_size;

FLUSH STATUS;

-- ECHO '# Test1#'
SET @@GLOBAL.thread_cache_size=3;
SHOW STATUS LIKE 'Threads_cached';
--echo 0 Expected

##################################
# Make 4 connections             #
##################################

--echo ** Connecting conn1 using username 'root' **
CONNECT (conn1,localhost,root,,);
--echo ** Connecting conn2 using username 'root' **
CONNECT (conn2,localhost,root,,);
--echo ** Connecting conn3 using username 'root' **
CONNECT (conn3,localhost,root,,);
--echo ** Connecting conn4 using username 'root' **
CONNECT (conn4,localhost,root,,);

--echo ** Connection default **
CONNECTION default;

# Wait until all connections done
let $wait_condition= SELECT COUNT(*)= 5 FROM INFORMATION_SCHEMA.PROCESSLIST;
--source include/wait_condition.inc

SHOW STATUS LIKE 'Threads_cached';
--echo 0 Expected

####################################
#Disconnecting all the connections #
####################################

--echo ** Disconnecting conn1,conn2,conn3,conn4 **
DISCONNECT conn1;
DISCONNECT conn2;
DISCONNECT conn3;
DISCONNECT conn4;

#
# Checking the status
#

# Wait until all disconnects ready
let $wait_condition= SELECT COUNT(*)= 1 FROM INFORMATION_SCHEMA.PROCESSLIST;
--source include/wait_condition.inc

SHOW STATUS LIKE 'Threads_cached';
--echo 3 Expected

#
# Decreasing cache size to 1
#
SET @@GLOBAL.thread_cache_size= 1;

--echo ** Connecting conn1 using username 'root' **
CONNECT (conn1,localhost,root,,);
--echo ** Connecting conn2 using username 'root' **
CONNECT (conn2,localhost,root,,);

--echo connection default;
CONNECTION default;

# Wait until all connects ready
let $wait_condition= SELECT COUNT(*)= 3 FROM INFORMATION_SCHEMA.PROCESSLIST;
--source include/wait_condition.inc

--echo ** Disconnecting conn1,conn2 **
DISCONNECT conn1;
DISCONNECT conn2;

# Wait until all disconnects ready
let $wait_condition= SELECT COUNT(*)= 1 FROM INFORMATION_SCHEMA.PROCESSLIST;
--source include/wait_condition.inc

SHOW STATUS LIKE 'Threads_cached';
--echo 1 Expected

#
# Cleanup
#

SET @@GLOBAL.thread_cache_size = @global_thread_cache_size;

