客户说OEM忽然不能用了。因为应用程序链接了OEM的部分页面,必须马上恢复。登陆客户服务器,执行emctl status dbconsole,显示未
场景:
客户说OEM忽然不能用了。因为应用程序链接了OEM的部分页面,必须马上恢复。
现象:
登陆客户服务器,执行emctl status dbconsole,显示未启动。尝试启动报错。
解决步骤:
1) 启动dbconsole,等了好长时间,提示不成功。部分日志如下:
2) 以为是修改了IP之类的,确认网络配置无问题后,重建资料库及数据库控制组
结果还是提示上面的错误,OEM任然启动不起来。
后来将主机名,换成127.0.0.1后,重新创建资料库及数据库控制组。仍然启动不起来。
一晃2小时过去了.......
3) google一番后,发现极可能是bug,10.2.0.4上必须打个补丁,Patch 8350262 。 下载补丁---------打补丁
4) 重建资料库,又提示错误了:
SYSMAN already exists........
资料库能删除,但创建就报错......这个纠结。
删除数据库上部分对象:
再次尝试创建资料库,终于好了。
5) 创建数据库控制组,又报错了......
按提示操作,提示不能连接到数据库实例。
6) 进入OEM,提示数据库实例及监听都没启动,但实例及监听明明好好的。
忽然记起,是不是把tnsname.ora和listener.ora中主机名改成了127.0.0.1引起的。原样修改回去。关闭OEM,重启监听,重启OEM....
终于一切正常了。
7) 按照上面截图提示,修改SYSMAN密码后,果断收工.....
总结:
平时没事多看看oracle的bug,总是好的,省时、省心、省事;
使用OEM,尽量不要去修改主机的IP地址;
多多查看oracle操作日志。

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

ToaddauserremotelytoMySQL,followthesesteps:1)ConnecttoMySQLasroot,2)Createanewuserwithremoteaccess,3)Grantnecessaryprivileges,and4)Flushprivileges.BecautiousofsecurityrisksbylimitingprivilegesandaccesstospecificIPs,ensuringstrongpasswords,andmonitori

TostorestringsefficientlyinMySQL,choosetherightdatatypebasedonyourneeds:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseTEXTforlong-formtextcontent.4)UseBLOBforbinarydatalikeimages.Considerstorageov

When selecting MySQL's BLOB and TEXT data types, BLOB is suitable for storing binary data, and TEXT is suitable for storing text data. 1) BLOB is suitable for binary data such as pictures and audio, 2) TEXT is suitable for text data such as articles and comments. When choosing, data properties and performance optimization must be considered.

No,youshouldnotusetherootuserinMySQLforyourproduct.Instead,createspecificuserswithlimitedprivilegestoenhancesecurityandperformance:1)Createanewuserwithastrongpassword,2)Grantonlynecessarypermissionstothisuser,3)Regularlyreviewandupdateuserpermissions

MySQLstringdatatypesshouldbechosenbasedondatacharacteristicsandusecases:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseBINARYorVARBINARYforbinarydatalikecryptographickeys.4)UseBLOBorTEXTforlargeuns


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SublimeText3 English version
Recommended: Win version, supports code prompts!

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver Mac version
Visual web development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
