MySQL5.7vs8.0，机能PK

发布时间：12/01 来源：未知浏览：关键词：

mysql教程栏目介绍MySQL5.7和MySQL8.0的机能对照。

mysql教程栏目介绍MySQL 5.7和MySQL 8.0的机能对照。

配景

测试mysql5.7和mysql8.0 离别在读写、只读、只写模式下不一样并发时的机能（tps，qps）

条件

测试运用版本为mysql5.7.22和mysql8.0.15
sysbench测试前先重新启动mysql办事，并清空os的cache（以免屡次测试时命中缓存）
每次进行测试都是新生成测试数据后再进行mysql5.7和mysql8.0的测试
每次测试时保障mysql5.7和mysql8.0的配置参数一致

环境

机器

cat /etc/redhat-release | xargs echo '版本 ' && dmidecode -s system-product-name | xargs echo '可否虚拟化 ' && cat /proc/cpuinfo |grep "processor"|wc -l | xargs echo 'cpu核数 ' 
版本 CentOS Linux release 7.5.1804 (Core)  
可否虚拟化 KVM  
cpu核数 4

myql5.7.22

5.7.22-log
innodb_buffer_pool_size 128M
innodb_log_buffer_size  64M
innodb_log_file_size    48M
binlog_format   ROW
log_bin ON
transaction_isolation   REPEATABLE-READ

mysql8.0.15

8.0.15
innodb_buffer_pool_size 128M
innodb_log_buffer_size  64M
innodb_log_file_size    48M
binlog_format   ROW
log_bin ON
transaction_isolation   REPEATABLE-READ

sysbench

sysbench -V
sysbench 1.1.0 (using bundled LuaJIT 2.1.0-beta3)

测试

在不一样的耐久化战略下（binlog, redo log耐久化）mysql5.7和mysql8.0 在读写模式、只读模式、只写模式（oltp_read_write，oltp_read_only，oltp_write_only）下的机能体现
sysbench 测试工夫为60s，测试的表数目为20
测试离别在双1模式（平安性）和0 2模式（高机能）下进行
SHOW GLOBAL VARIABLES WHERE Variable_name IN('sync_binlog','innodb_flush_log_at_trx_commit'); +--------------------------------+-------+ | Variable_name | Value | +--------------------------------+-------+ | innodb_flush_log_at_trx_commit | 1 | | sync_binlog | 1 | +--------------------------------+-------+

mysql5.7和mysql8.0 在读写模式下的体现

双1 配置，只写模式下，随着并发数的上升，mysql5.7.22 的机能比mysql8.0.15 好1/4摆布。

0 2 模式下

SHOW GLOBAL  VARIABLES WHERE Variable_name IN('sync_binlog','innodb_flush_log_at_trx_commit');
+--------------------------------+-------+
| Variable_name                  | Value |
+--------------------------------+-------+
| innodb_flush_log_at_trx_commit | 2     |
| sync_binlog                    | 0   |
+--------------------------------+-------+

mysql5.7和mysql8.0 在读写模式下的体现

0 2 配置，只写模式下，mysql5.7.22的tps 颤动比拼大；mysql5.7.22 的qps比mysql8.0.15好1/3摆布

结论

整体来看，mysql5.7.22在读写模式、只读模式、只写模式下的体现是优于mysql8.0.15的
随着并行数的添加，机能体现不会也跟着添加，还会涌现下落
本次测试效果是在配置很低的状况下进行的，不代表绝对

注意

sysbench 需要设定--db-ps-mode=disable 禁用预编译语句，否则并发测试线程多时会报下面的差错

FATAL: mysql_stmt_prepare() failed
FATAL: MySQL error: 1461 "Can't create more than max_prepared_stmt_count statements (current value: 16382)"
FATAL: mysql_stmt_prepare() failed
FATAL: MySQL error: 1461 "Can't create more than max_prepared_stmt_count statements (current value: 16382)"
FATAL: thread_init' function failed: /usr/local/share/sysbench/oltp_common.lua:288: SQL API error FATAL: mysql_stmt_prepare() failed FATAL: MySQL error: 1461 "Can't create more than max_prepared_stmt_count statements (current value: 16382)" FATAL:thread_init' function failed: /usr/local/share/sysbench/oltp_common.lua:288: SQL API error
FATAL: mysql_stmt_prepare() failed

运用足本

cat sysbench_test_mysql5.7_8.0_tps_qps.sh
#!/bin/bash
#用于sysbench 测试在读写模式、只读模式、只写模式下 mysql5.7和mysql8.0 的tps,qps
#nohup bash $0 >/tmp/sysbench_test 2>& 1 &
#
user=admin
passwd=admin
ports="8015 57222"
host=127.0.0.1
sysbench_test_mode="oltp_read_write oltp_read_only oltp_write_only"
sysbench_test_info_path=/tmp/sysbench-test
function red_echo () {
        local what="$*"
        echo -e "$(date +%F-%T) e[1;31m ${what} e[0m"
}
function check_las_comm(){
    if [ $1 -ne 0 ];then
        red_echo $2
        exit 1
    fi
}
function  restart_mysqld(){
  service mysqld${1} restart
  sleep 2
}
function  purge_binlog(){
port=$1
mysql -u$user -p$passwd -P$port -h$host< /proc/sys/vm/drop_caches
}
function  sysbench_with_diff_thread(){
thread_num=$1
port=$2
order=$3
test_mode=$4
sysbench /usr/local/share/sysbench/${test_mode}.lua --mysql_storage_engine=innodb  --table-size=100000 --tables=20 --mysql-db=test_1 --mysql-user=$user --mysql-password=$passwd --mysql-port=$port  --mysql-host=$host --threads=$thread_num  --time=60 --report-interval=2 --db-ps-mode=disable --events=0 --db-driver=mysql $order
}
function  main(){
for test_mode in $sysbench_test_mode;do
  for port in $ports;do
    for thread_num in {5,10,20,30,40,80,120,200};do
      restart_mysqld "$port"
      check_las_comm  "$?" "restart mysqld${port} failed "
      clean_os_cache
      purge_binlog "$port"
      red_echo "sysbench $thread_num  threads cleanup mysqld${port}"
      sysbench_with_diff_thread "$thread_num" "$port" "cleanup" "$test_mode">/dev/null
      red_echo "sysbench $thread_num  threads prepare mysqld${port}"
      sysbench_with_diff_thread "$thread_num" "$port" "prepare" "$test_mode">/dev/null
      mkdir -p $sysbench_test_info_path
      red_echo "sysbench $thread_num  threads run mysqld${port} $test_mode"
      sysbench_with_diff_thread "$thread_num" "$port" "run" "$test_mode" > $sysbench_test_info_path/${test_mode}_${thread_num}_$port
      # service mysqld{port} stop
    done
  done
done
}
main