mysql 8.0版本性能参数优化脚本
时间: 2023-10-26 11:06:10 浏览: 58
以下是一个 MySQL 8.0版本性能参数优化脚本示例:
```bash
#!/bin/bash
# MySQL 8.0参数优化脚本
# 获取当前CPU核心数
cpu_cores=$(grep -c ^processor /proc/cpuinfo)
# 获取当前内存总量
total_mem=$(free -b | grep Mem | awk '{print $2}')
# 计算innodb_buffer_pool_size参数大小
innodb_buffer_pool_size=$(echo "scale=0; $total_mem * 0.8" | bc)
echo "innodb_buffer_pool_size = $innodb_buffer_pool_size"
# 计算innodb_log_file_size参数大小
innodb_log_file_size=$(echo "scale=0; $total_mem * 0.05 / 2" | bc)
echo "innodb_log_file_size = $innodb_log_file_size"
# 计算innodb_read_io_threads参数大小
innodb_read_io_threads=$(echo "scale=0; $cpu_cores * 2" | bc)
echo "innodb_read_io_threads = $innodb_read_io_threads"
# 计算innodb_write_io_threads参数大小
innodb_write_io_threads=$(echo "scale=0; $cpu_cores * 2" | bc)
echo "innodb_write_io_threads = $innodb_write_io_threads"
# 计算innodb_thread_concurrency参数大小
innodb_thread_concurrency=$(echo "scale=0; $cpu_cores * 2" | bc)
echo "innodb_thread_concurrency = $innodb_thread_concurrency"
# 检查并设置参数
mysql -e "SET GLOBAL innodb_buffer_pool_size=$innodb_buffer_pool_size;"
mysql -e "SET GLOBAL innodb_log_file_size=$innodb_log_file_size;"
mysql -e "SET GLOBAL innodb_read_io_threads=$innodb_read_io_threads;"
mysql -e "SET GLOBAL innodb_write_io_threads=$innodb_write_io_threads;"
mysql -e "SET GLOBAL innodb_thread_concurrency=$innodb_thread_concurrency;"
```
该脚本会根据当前系统的CPU核心数和内存总量计算出可用的 innodb_buffer_pool_size、innodb_log_file_size、innodb_read_io_threads、innodb_write_io_threads 和 innodb_thread_concurrency 参数大小,并设置相应的参数值。你可以根据实际情况修改计算公式和需要设置的参数。注意,执行该脚本需要有足够的权限。