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 innodb_purge_rseg_truncate_frequency=128; set ...
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、...
SET GLOBAL read_only = ON; What is the lock for? My testing suggests that using a Read Lock inserts will wait, which could cause our webservers to fall over as the requests start to stack up. While jut setting read_only with no lock will cause inserts to fail quickly; which is not...
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...
ReadOnly仅影响单元格是否可编辑;它并不影响用户是否可以删除行。 msdn2.microsoft.com 10. Avoidusingconstonread-onlyvariables.Forthat,usethereadonlydirective. 只读的变量不要定义为const,使用readonly关键字。 www.cnblogs.com 1 2 3 4
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, edit...
?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...
test=# alter user u_r set default_transaction_read_only=on; ALTER ROLE test=# \du List of roles Role name | Attributes | Member of ---+---+--- sao | No inheritance | {} sso | No inheritance | {} system | Superuser, Create role, Create DB, Replication, Bypass RLS | {} tom...
Does anyone have a workaround for this issue? Thank you in advance! This was my first post on this community thread. Kind Regards, Chris Thanks for the interest in the post. I should have also stated that I am running Windows 10 on my laptop, and the Lookup Column dis...
SAP itself does not provide read-only access in the manner you require, because the functionality is very dependent on exactly what DBMS you are using and how it is installed. It is DB/2 Functionality, not SAP functionality, and is configured in DB/2, as specified in the Enabling reads ...