我们通常会给从库设置只读, 一般是设置read_only=ON即可, 那么这个只读限定了哪些只读呢? super_read_only,transaction_read_only/tx_read_only, innodb_read_only 又是限定啥的呢? super_read_only 当设置super_read_only=ON的时候, 会自动设置read_only=ON 比read_only多限制了有super权限的账号. 真正的只...
1、read_only参数和super_read_only参数默认都是关闭的,read_only参数设置为on的情况下,会组织客户端的更新,但是如果一个账号拥有super权限,那么还是可以进行更新的。而super_read_only会阻止所有的客户端更新,即使客户端拥有super权限也不可以。 2、设置super_read_only参数为on会默认联动的设置read_only为on 3、...
查阅官方bug信息https://bugs.mysql.com/bug.php?id=104573 ,发现有类似的从库undo表空间长时间处于清理状态,该问题是由参数 super_read_only =ON 触发的。 1. 2. 3. 问题解决: 重启有undo_*_trunc.log的从节点mysqld,重启后undo_*_trunc.log文件消失。 修改参数减少undo的truncate操作。 set persist inno...
a study show that young children who read only on a study shows that young children who read only on 这个句子不完整,如果意思是"一项研究表明,只读电子书的儿童",那么正确的英文表达应该是: A study shows that young children who only read e-books....
Status:VerifiedImpact on me: None Category:MySQL Server: ReplicationSeverity:S3 (Non-critical) Version:5.7.26, 5.7.27OS:Any Assigned to:CPU Architecture:Any [25 Aug 2019 11:58] Przemyslaw Malkowski Description:When a semi-sync master lost connection with it's slave, thus is waiting for the...
QEMU on Proxmox cluster.yml file: cluster_name: pokedex ssh_key_path: ~/.ssh/id_desktop nodes: - address: bulbasaur.lan user: core role: - etcd - controlplane - worker - address: charmander.lan user: core role: - etcd - controlplane - worker - address: squirtle.lan user: core role...
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Assume that you publish a Microsoft Access 2013 web app on a public Microsoft SharePoint 2013 site. When you try to access the app without being signed in to SharePoint, the app opens in read-only mode. Specifically, the menu bar buttons are disabled, and you cannot add, edi...
(scott@localhost)[(none)]>showglobalvariableslike'read_only';+---+---+|Variable_name|Value|+---+---+|read_only|ON|+---+---+(scott@localhost)[(none)]>showgrants;+---
?onUpgrage() 方法，它需要三个参数，一个 SQLiteDatabase 对象，一个旧的版本号和一个新的版本号，这样你就可以清楚如何把一个数据库从旧的模型转变到新的模型。下面示例代码展示了如何继承 SQLiteOpenHelper 创建数据库：代码如下 复制代码 public class DatabaseHelper extends SQLiteOpenHelper { Data...