在以下示例中,innodb_buffer_pool_size设置为3G,innodb_buffer_pool_instances设置为8。innodb_buffer_pool_chunk_size默认值为128M。 3G是有效的innodb_buffer_pool_size值,因为3G是innodb_buffer_pool_instances = 8 * innodb_buffer_pool_chunk_size = 128M的倍数 # mysqld--innodb_buffer_pool_size=3G --...
IN A ;; ANSWER SECTION: r-mysql-mgr-server-lhr.service.consul. 0 IN A 192.168.68.62 r-mysql-mgr-server-lhr.service.consul. 0 IN A 192.168.68.61 ;; Query time: 0 msec ;; SERVER: 192.168.68.66#8600(192.168.68.66) ;; WHEN: Wed Mar 10 10:52:12 CST 2021 ;; MSG SIZE rcvd: 98 ...
size=8388608 max_used_connections=23 max_threads=2000 thread_count=17 connection_count=17 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 20523165 K bytes of memory Hope that's ok; if not, decrease some variables in ...
Find your db size query ; SELECT s.schema_name, CONCAT(IFNULL(ROUND((SUM(t.data_length)+SUM(t.index_length)) /1024/1024,2),0.00)) total_size_in_MB, CONCAT(IFNULL(ROUND(((SUM(t.data_length)+SUM(t.index_length))-SUM(t.data_free))/1024/1024,2),0.00)) data_used_IN_MB, ...
MySQL从4.0的版本开始支持union查询,它可以把需要使用临时表的两条或更多的select查询合并的一个查询中。在客户端的查询会话结束的时候,临时表会被自动删除,从而保证数据库整齐、高效。使用union来创建查询的时候,我们只需要用UNION作为关键字把多个select语句连接起来就可以了,要注意的是所有select语句中的字段数目要想...
sudo service mysql start 这样可以在不丢失数据的情况下修复InnoDB引擎无法启动的问题。2. 检查my.cnf文件的配置参数 如果MySQL的配置文件my.cnf中存在参数配置错误，可能会导致InnoDB引擎无法启动。检查my.cnf文件的innodb_buffer_pool_size、innodb_log_file_size、innodb_log_buffer_size等参数的值是否...
1118 - Row size too large. The maximum row size for the used table type, not counting BLOBs, is 65535. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs 写在最后 从Mysql的B+树结构和其他可能的数据库数据结构设计,可以发现B+树是多种数据结...
MySQL 企业版是在 5.5 版本引入的线程池,以插件的方式实现的。 相同点: 都具备线程池功能,都支持thread_pool_size参数。 都支持专有 listener 线程(thread_pool_dedicated_listeners参数)。 都支持高低优先级队列,且在避免低优先级队列事件饿死方面,二者采用了相同方案,即低优先级队列事件等待一段时间(thread_pool...
9M+vehicles serviced “We use MongoDB as the core database for our services, so any new innovative idea or new service we build, we automatically say, ‘We’re going to use MongoDB as the core platform,’ knowing that it’s going to give us the reliability and the scalability that we...
MariaDB is one of the most popular open source databases in the world. With MySQL and Oracle compatibility, teams can avoid retraining, new tools or application rewrites, allowing developers to accelerate development and realize business value faster. Learn moreEnterprise...