diff --git a/max_memory_limit_mysql.sh b/max_memory_limit_mysql.sh
index be2ac0d..b0a7e9c 100755
--- a/max_memory_limit_mysql.sh
+++ b/max_memory_limit_mysql.sh
@@ -1,8 +1,25 @@
 #!/usr/bin/env bash
 
-mysql_credential="--login-path=local"
-#mysql_credential="--defaults-file=/etc/mysql/debian.cnf"
-#mysql_credential="--defaults-file=/usr/local/mysql/sys-maint.cnf"
+working_dir="$(dirname $(realpath $0))"
+log_dir="${working_dir}/log"
+
+conf_file="${working_dir}/conf/create_drop_database.conf"
+
+tmp_log_file="$(mktemp)"
+
+# -------------
+# - Variable settings
+# -------------
+
+#DEFAULT_ACTION='create'
+DEFAULT_MYSQL_CREDENTIAL_ARGS="--login-path=local"
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file" > $tmp_log_file 2>&1
+fi
+
+[[ -n "$MYSQL_CREDENTIAL_ARGS" ]] || MYSQL_CREDENTIAL_ARGS="$DEFAULT_MYSQL_CREDENTIAL_ARGS"
+
 
 declare -i key_buffer_size
 declare -i query_cache_size
@@ -18,47 +35,47 @@ declare -i join_buffer_size
 declare -i thread_stack
 declare -i binlog_cache_size 
 
-key_buffer_size=`mysql $mysql_credential -N -s -e \
+key_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'key_buffer_size'" | awk '{print$2}'`
-query_cache_size=`mysql $mysql_credential -N -s -e \
+query_cache_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'query_cache_size'" | awk '{print$2}'`
-tmp_table_size=`mysql $mysql_credential -N -s -e \
+tmp_table_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'tmp_table_size'" | awk '{print$2}'`
-innodb_buffer_pool_size=`mysql $mysql_credential -N -s -e \
+innodb_buffer_pool_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'innodb_buffer_pool_size'" | awk '{print$2}'`
-innodb_additional_mem_pool_size=`mysql $mysql_credential -N -s -e \
+innodb_additional_mem_pool_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'innodb_additional_mem_pool_size'" | awk '{print$2}'`
-innodb_log_buffer_size=`mysql $mysql_credential -N -s -e \
+innodb_log_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'innodb_log_buffer_size'" | awk '{print$2}'`
-max_connections=`mysql $mysql_credential -N -s -e \
+max_connections=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'max_connections'" | awk '{print$2}'`
-sort_buffer_size=`mysql $mysql_credential -N -s -e \
+sort_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'sort_buffer_size'" | awk '{print$2}'`
-read_buffer_size=`mysql $mysql_credential -N -s -e \
+read_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'read_buffer_size'" | awk '{print$2}'`
-read_rnd_buffer_size=`mysql $mysql_credential -N -s -e \
+read_rnd_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'read_rnd_buffer_size'" | awk '{print$2}'`
-join_buffer_size=`mysql $mysql_credential -N -s -e \
+join_buffer_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'join_buffer_size'" | awk '{print$2}'`
-thread_stack=`mysql $mysql_credential -N -s -e \
+thread_stack=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'thread_stack'" | awk '{print$2}'`
-binlog_cache_size=`mysql $mysql_credential -N -s -e \
+binlog_cache_size=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'binlog_cache_size'" | awk '{print$2}'`
 
-mysql_version=`mysql $mysql_credential -N -s -e \
+mysql_version=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'version'" | awk '{print$2}' | sed -e's/-.*$//'`
-mysql_version_compile_machine=`mysql $mysql_credential -N -s -e \
+mysql_version_compile_machine=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW VARIABLES LIKE 'version_compile_machine'" | awk '{print$2}'`
 
 declare -i max_used_connections
 declare -i uptime
 declare -i threads_connected
 
-max_used_connections=`mysql $mysql_credential -N -s -e \
+max_used_connections=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW STATUS LIKE 'Max_used_connections'" | awk '{print$2}'`
-threads_connected=`mysql $mysql_credential -N -s -e \
+threads_connected=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW STATUS LIKE 'Threads_connected'" | awk '{print$2}'`
-uptime=`mysql $mysql_credential -N -s -e \
+uptime=`mysql $MYSQL_CREDENTIAL_ARGS -N -s -e \
    "SHOW STATUS LIKE 'Uptime'" | awk '{print$2}'`
 
 _now=`date +%s`