mysql优化后的主配置文件

#!/bin/bash
basedir=$mysql
datadir=$mysql/data
server_id=$(hostname -I | awk  '{print $NF}'|awk -F '.' '{print $NF}')
mem=$(free | awk NR=='{print $2}')
innodb_buffer_pool_size=$(($mem///+))G

cat >/etc/my.cnf <<EOF
[mysqld]
basedir = ${basedir}
datadir = ${datadir}
character_set_server = utf8
skip_name_resolve = on
innodb_buffer_pool_size =${innodb_buffer_pool_size}
innodb_write_io_threads =
innodb_read_io_threads=
innodb_log_file_size = 128M
innodb_log_buffer_size = 32M
innodb_page_cleaners =
innodb_io_capacity =
innodb_flush_log_at_trx_commit  =
innodb_flush_method = O_DIRECT
max_allowed_packet = 32M
max_connections =
key_buffer_size = 32M
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
thread_stack = 256K
thread_cache_size =
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type =
server_id = ${server_id}
log_bin = mysql-bin
binlog_format = row
relay_log = relay-log
gtid_mode = ON
enforce_gtid_consistency = true
master_info_repository = TABLE
relay_log_info_repository = TABLE
slave_parallel_type = LOGICAL_CLOCK
slave_parallel_workers =
relay_log_recovery = ON
slow_query_log = on
long_query_time =
slow_query_log_file = mysql-slow.log
expire_logs_days =
log_error = mysql.log
log_bin_trust_function_creators = on
sql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION"
lower_case_table_names =
log_timestamps = SYSTEM
group_concat_max_len = 10240000

EOF