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mysql参数innodb
mysql参数innodb
mysql
参数
innodb
_flush_log_at_trx_commit
设置一个
参数
innodb
_flush_log_at_trx_commit=2 插入速度立马变快,提升了
数
十倍。这个参数有什么意义?该参数取值可以是0,1,2 innodb_flush_log_at_trx_commit=0,Innodb 中的Log Thread 没隔1 秒钟会将log buffer中的数据写入到文件,...
mysql
性能
参数
innodb
_flush_log_at_trx_commit
每次
innodb
_flush_log_at_trx_commit 这个
参数
的几个值表示的意思老是记不清,现在整理下来,方便查看。0-每秒把Logbuffer的内容写到日志文件,并且Flash到磁盘。1-每次Commit的时候Flush到磁盘,这个是最安全的,照理也是性能最差的。2-...
MySQL
innodb
_large_prefix
参数
原因其实,在
MySQL
5.6 版本后引入了
参数
innodb
_large_prefix 可以解决这个问题。该参数控制是否允许单列的索引长度超过 767 字节,有 ON 和 OFF 两个取值:ON:Innodb 表的行记录格式(row format)是 Dynamic 或 Compressed 的前提下,...
MySQL
innodb
_undo_tablespaces相关
参数
配合
参数innodb
_undo_logs和innodb_undo_tablespaces,这决定了系统表空间外还原日志的磁盘分布。默认目录为innodb默认创建它的其他日志文件的目录。如果想转移undo文件的位置,只需要修改下该配置,并将undo文件拷贝过去就可以了。【支持...
MySQL
·
参数
故事·
innodb
_additional_mem_pool_size
数据库
中的表数量越多,
参数
值应该越大,如果
InnoDB
用完了内存池中的内存,就会从操作系统中分配内存,同时在 error log 中打入报警信息。
innodb
_use_sys_malloc 配置为 ON 时,
innodb
_additional_mem_pool_size 失效(直接从操作系统...
MySQL
·
参数
故事·
innodb
_additional_mem_pool_size
数据库
中的表数量越多,
参数
值应该越大,如果
InnoDB
用完了内存池中的内存,就会从操作系统中分配内存,同时在 error log 中打入报警信息。
innodb
_use_sys_malloc 配置为 ON 时,
innodb
_additional_mem_pool_size 失效(直接从操作系统...
MYSQL
INNODB
innodb
_thread_concurrency相关
参数
理解
二、
参数
解释 好了有了上面的理论知识可以进行这几个
参数
的解释了 其实这三个
参数
就是来解决上面的问题 1、
innodb
_thread_concurrency 同一时刻能够进入
innodb
层次并发执行的线程
数
(注意是并发不是并行),如果超过CPU核数,某些线程可能...
[
MySQL
5.6]5.6 新
参数innodb
_lru_scan_depth 浅析
innodb
_lru_scan_depth是5.6新增加的
参数
,根据官方文档描述,它会影响page cleaner线程每次刷脏页的数量,这是一个每1秒 loop一次的线程。在
Innodb
内部,这个
参数
对应变量为srv_LRU_scan_depth grep了一把,有几个地方会涉及到这个
参数
1....
提升
mysql
性能的关键
参数
之
innodb
_buffer_pool_size、
innodb
_buffer_pool_instances
时至今日,通过比对
mysql
的配置文件
my
.ini,不经意间,我们发现
innodb
_buffer_pool_size在8M和48M的配置下,性能简直就不在一个等级上,OK,那就继续调查吧,最终得出如下结论
innodb
_buffer_pool_size=2G
innodb
_buffer_pool_instances=1 ...
提升
mysql
性能的关键
参数
之
innodb
_buffer_pool_size、
innodb
_buffer_pool_instances
提升
mysql
性能的关键
参数
之
innodb
_buffer_pool_size、
innodb
_buffer_pool_instances。首先我们先看一下,我的电脑(i3-3220,4G内存,没有配置
innodb
_buffer_pool_size
参数
的情况下,抛开程序的性能,经过1个线程-8个线程的测试结果)环境...
1
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
SaaS上云数据库
数据库客户案例合集
产品推荐
云数据库PolarDB
云原生数据仓库MySQL
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
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