What to do if Oracle11g physical memory fails

Oracle11g physical memory failure solution: 1. Ensure that the physical memory size of the system meets the minimum requirements; 2. Check the memory allocation parameters, check whether the parameter settings are reasonable and match the system physical memory; 3. Check the operating system Resource limits, use the ulimit command to view and modify resource limits; 4. Check the database load, consider optimizing queries, adding hardware resources or spreading the load; 5. Check the database configuration, if it is unreasonable, adjust it as needed; 6. If the above steps If neither solves the problem, contact Oracle support.

#The operating environment of this article: Windows 10 system, oracle11g version, Dell G3 computer.

Oracle 11g is a relational database management system that uses physical memory to store data and execute queries. If you encounter physical memory failure when using Oracle 11g, you can take the following steps to solve the problem:

1. Check the system configuration: First, ensure that the physical memory size of the system complies with Oracle 11g minimum requirement. According to Oracle official documentation, the minimum physical memory requirement for Oracle 11g is 1GB. If the system's physical memory is less than this value, you can try to increase the system's physical memory to solve the problem.

2. Check the memory allocation parameters: In Oracle 11g, there are several memory allocation parameters that can be configured, including SGA_TARGET, SGA_MAX_SIZE and PGA_AGGREGATE_TARGET. The SGA_TARGET parameter controls the size of the system global area, the SGA_MAX_SIZE parameter controls the maximum size of SGA, and the PGA_AGGREGATE_TARGET parameter controls the size of PGA. Check whether the settings of these parameters are reasonable and match the physical memory of the system. If these parameters are set too large, physical memory may fail. The problem can be solved by modifying the values ​​of these parameters.

3. Check the operating system resource limits: The operating system usually limits the physical memory size that each process can use. If Oracle 11g's physical memory fails, it may be because the operating system limits the physical memory usage of the process. You can check your operating system's resource limits and adjust them if necessary. In Linux systems, you can use the ulimit command to view and modify resource limits.

4. Check the database load: If the database load is too high, it may cause physical memory failure. You can use the performance monitoring tools provided by Oracle to check the load of the database, including viewing the number of active sessions of the database, query execution plan, etc. If the load on the database is too high, you can consider optimizing queries, adding hardware resources, or spreading the load to solve the problem of physical memory failure.

5. Check the database configuration: In Oracle 11g, there are some other configuration options that can affect the use of physical memory, such as automatic memory management (AMM) and memory target (MEMORY_TARGET), etc. . You can check that these configuration options are set appropriately and adjust them as needed.

6. Contact Oracle support: If the above steps cannot solve the problem of physical memory failure, you can contact Oracle's technical support team for help. They can provide more detailed solutions based on the specific situation.

Summary

When Oracle 11g encounters a physical memory failure, you can check the system configuration, memory allocation parameters, operating system resource limits, database load and database Configuration and other aspects to solve the problem. If none of the above methods resolve the issue, you can contact the Oracle support team for further assistance.

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