MySQL5.7vs8.0，性能PK

mysql教程栏目介绍MySQL 5.7和MySQL 8.0的性能对比。

背景

测试mysql5.7和mysql8.0 分别在读写、只读、只写模式下不同并发时的性能（tps，qps）

前提

• 测试使用版本为mysql5.7.22和mysql8.0.15
• sysbench测试前先重启mysql服务，并清空os的cache（避免多次测试时命中缓存）
• 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
• 每次测试时保证mysql5.7和mysql8.0的配置参数一致

环境

机器

cat /etc/redhat-release | xargs echo &＃39;版本 &＃39; && dmidecode -s system-product-name | xargs echo &＃39;是否虚拟化 &＃39; && cat /proc/cpuinfo |grep "processor"|wc -l | xargs echo &＃39;cpu核数 &＃39; 
版本 CentOS Linux release 7.5.1804 (Core)  
是否虚拟化 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

• 在不同的持久化策略下（binlog, redo log持久化）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）下的性能表现

• sysbench 测试时间为60s，测试的表数量为20

• 测试分别在双1模式（安全性）和0 2模式（高性能）下进行

  SHOW GLOBAL VARIABLES WHERE Variable_name IN(&＃39;sync_binlog&＃39;,&＃39;innodb_flush_log_at_trx_commit&＃39;); +--------------------------------+-------+ | Variable_name | Value | +--------------------------------+-------+ | innodb_flush_log_at_trx_commit | 1 | | sync_binlog | 1 | +--------------------------------+-------+

mysql5.7和mysql8.0 在读写模式下的表现

• 双1 配置，只写模式下，随着并发数的上升，mysql5.7.22 的性能比mysql8.0.15 好1/4左右。

0 2 模式下

SHOW GLOBAL  VARIABLES WHERE Variable_name IN(&＃39;sync_binlog&＃39;,&＃39;innodb_flush_log_at_trx_commit&＃39;);
+--------------------------------+-------+
| Variable_name                  | Value |
+--------------------------------+-------+
| innodb_flush_log_at_trx_commit | 2     |
| sync_binlog                    | 0   |
+--------------------------------+-------+ 

mysql5.7和mysql8.0 在读写模式下的表现

• 0 2 配置，只写模式下，mysql5.7.22的tps 抖动比较大；mysql5.7.22 的qps比mysql8.0.15好1/3左右

结论

• 整体来看，mysql5.7.22在读写模式、只读模式、只写模式下的表现是优于mysql8.0.15的
• 随着并行数的增加，性能表现不会也跟着增加，还会出现下降
• 本次测试结果是在配置很低的情况下进行的，不代表绝对

注意

sysbench 需要设置--db-ps-mode=disable 禁用预编译语句，不然并发测试线程多时会报下面的错误

FATAL: mysql_stmt_prepare() failed
FATAL: MySQL error: 1461 "Can&＃39;t create more than max_prepared_stmt_count statements (current value: 16382)"
FATAL: mysql_stmt_prepare() failed
FATAL: MySQL error: 1461 "Can&＃39;t create more than max_prepared_stmt_count statements (current value: 16382)"
FATAL: thread_init&＃39; function failed: /usr/local/share/sysbench/oltp_common.lua:288: SQL API error FATAL: mysql_stmt_prepare() failed FATAL: MySQL error: 1461 "Can&＃39;t create more than max_prepared_stmt_count statements (current value: 16382)" FATAL:thread_init&＃39; function failed: /usr/local/share/sysbench/oltp_common.lua:288: SQL API error
FATAL: mysql_stmt_prepare() failed 

使用脚本

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 

更多相关免费学习推荐：mysql教程(视频)

以上就是MySQL 5.7 vs 8.0，性能PK的详细内容，更多请关注 第一PHP社区 其它相关文章！