Oracle 窃听服务
有时候数据库管理员需要对生产数据库进行监测，调整，查看，试验。 生产数据库是不能随便乱动的，即使不是乱动，也要承担巨大的压力，如果意外慢了，死机了。你将吃不了兜着走，没有真实环境又如何学习，提高，测试，试验呢？ 我们搞 IT 越接近真实环境，那
有时候数据库管理员需要对生产数据库进行监测，调整，查看，试验。 生产数据库是不能随便乱动的，即使不是乱动，也要承担巨大的压力，如果意外慢了，死机了。你将吃不了兜着走，没有真实环境又如何学习，提高，测试，试验呢？
我们搞IT越接近真实环境，那么我们做的事情就越靠谱。虽然我们可以搞个空的ORACLE来学习，也可以搞个有真实数据的ORACLE来了解系统，也可以搞个DATAGUARD及时了解真实数据，逻辑DataGurad还可以查看SQL应用情况。唯一缺乏更改和用户请求数的环境。
那么我们可以写个程序把网络的IP包截获，检查是否发往生产数据库的。如果是的话那就复制个包，并且修改包的地址，把目的地址修改为模拟数据库，源地址修改为窃听服务的地址。 那么就产生了真实的环境。
DBA们就可以在模拟数据库上监测，搞试验了。
主数据库192.168.1.1 模拟数据库192.168.2.3 窃听服务 截获IP包 生成4个用户请求信息 返回的数据被服务放弃
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1387
52
MySQL: An Introduction to the World's Most Popular Database
Apr 12, 2025 am 12:18 AM
MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
Why Use MySQL? Benefits and Advantages
Apr 12, 2025 am 12:17 AM
MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.
What to do if the oracle can't be opened
Apr 11, 2025 pm 10:06 PM
Solutions to Oracle cannot be opened include: 1. Start the database service; 2. Start the listener; 3. Check port conflicts; 4. Set environment variables correctly; 5. Make sure the firewall or antivirus software does not block the connection; 6. Check whether the server is closed; 7. Use RMAN to recover corrupt files; 8. Check whether the TNS service name is correct; 9. Check network connection; 10. Reinstall Oracle software.
How to create cursors in oracle loop
Apr 12, 2025 am 06:18 AM
In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.
How to solve the problem of closing oracle cursor
Apr 11, 2025 pm 10:18 PM
The method to solve the Oracle cursor closure problem includes: explicitly closing the cursor using the CLOSE statement. Declare the cursor in the FOR UPDATE clause so that it automatically closes after the scope is ended. Declare the cursor in the USING clause so that it automatically closes when the associated PL/SQL variable is closed. Use exception handling to ensure that the cursor is closed in any exception situation. Use the connection pool to automatically close the cursor. Disable automatic submission and delay cursor closing.
How to create oracle dynamic sql
Apr 12, 2025 am 06:06 AM
SQL statements can be created and executed based on runtime input by using Oracle's dynamic SQL. The steps include: preparing an empty string variable to store dynamically generated SQL statements. Use the EXECUTE IMMEDIATE or PREPARE statement to compile and execute dynamic SQL statements. Use bind variable to pass user input or other dynamic values to dynamic SQL. Use EXECUTE IMMEDIATE or EXECUTE to execute dynamic SQL statements.
How to stop oracle database
Apr 12, 2025 am 06:12 AM
To stop an Oracle database, perform the following steps: 1. Connect to the database; 2. Shutdown immediately; 3. Shutdown abort completely.
How to read the oracle awr report
Apr 11, 2025 pm 09:45 PM
An AWR report is a report that displays database performance and activity snapshots. The interpretation steps include: identifying the date and time of the activity snapshot. View an overview of activities and resource consumption. Analyze session activities to find session types, resource consumption, and waiting events. Find potential performance bottlenecks such as slow SQL statements, resource contention, and I/O issues. View waiting events, identify and resolve them for performance. Analyze latch and memory usage patterns to identify memory issues that are causing performance issues.
