MySQL 5.6 Innodb数据页 16K vs 8K性能对比测试
从MySQL5.6开始,一个新参数innodb_page_size可以设置Innodb数据页为8K,4K,默认为16K。这个参数在一开始初始化时就要加入my.cnf里,如果已经创建了表,再修改,启动MySQL会报错。 参考手册: - 下面我针对16K和8K做了一个压力测试。 硬件:R710,72G内存,6
从MySQL5.6开始,一个新参数innodb_page_size可以设置Innodb数据页为8K,4K,默认为16K。这个参数在一开始初始化时就要加入my.cnf里,如果已经创建了表,再修改,启动MySQL会报错。
参考手册:
-
下面我针对16K和8K做了一个压力测试。
硬件:R710,72G内存,6块300G、15000转做的RAID10,XFS分区。
my.cnf参数:
1.innodb_buffer_pool_size = 48G 2.innodb_buffer_pool_instances = 8 3.innodb_flush_method = O_DIRECT 4.innodb_file_per_table = 15.innodb_read_io_threads = 16 6.innodb_write_io_threads = 16 7.innodb_io_capacity = 2000 8.innodb_log_files_in_group = 3 9.innodb_flush_log_at_trx_commit = 0 10.innodb_log_file_size = 1024M 11.innodb_max_dirty_pages_pct = 90 1.Sysbench参数(读写):
1.sysbench --test=oltp --mysql-table-engine=innodb --oltp-table-size=100000000 --max-requests=1000000 --num-threads=100 2.--mysql-host=192.168.110.121 --mysql-port=3306 --mysql-user=admin --mysql-password=123456 --mysql-db=test 3.--oltp-table-name=sbtest --mysql-socket=/tmp/mysql.sock run sbtest表1亿条记录,文件大小24G。
下面是16K性能图:
1.innodb_page_size = 16k
下面是8K性能图:
1.innodb_page_size = 8k
1.结论:默认页16K,对CPU压力较小,平均在20% 2.8K页,CPU压力为30%~40%,但select吞吐量要高于16K
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2.Sysbench参数(只读):
1.sysbench --test=oltp --mysql-table-engine=innodb --oltp-table-size=10000000 --max-requests=0 --num-threads=100 2.--oltp-read-only=on --mysql-host=192.168.110.121 --mysql-port=3306 --mysql-user=admin --mysql-password=123456 --mysql-db=test 3. --oltp-table-name=sbtest --mysql-socket=/tmp/mysql.sock run sbtest表1亿条记录,文件大小24G。
下面是16K和8K性能图:

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