Lỗi sql server attempted to read or write protected memory năm 2024

Please your help, I'm deploying the mssql server mgmt pack --> extensive sql monitor Template on a sql server but on the event console I have this event repetiatly

Unable to connect to database 'Server\Instance.master' as 'user@dominio' [System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at ovam_err_out(Int32 , SByte , Int32 , SByte* , UInt32 ) at Impersonate_util.create_logon_token()]. (10-21) [Policy: MSSQLServer_Messages]

I have events, and some metrics en dashboards, but this message is still showing up I dont know if I'm lossing some information or no.

When working with SQL Server 2014, encountering an error that mentions “attempted to read or write protected memory” can be a daunting experience. This message indicates that the SQL Server process tried to access a memory area that it was not permitted to, which can lead to a variety of issues, including service interruptions, data corruption, and system instability. In this article, we will delve into the causes of this error, explore troubleshooting steps, and discuss preventive measures to ensure the smooth operation of your SQL Server databases.

Understanding Protected Memory in SQL Server

Before we dive into the specifics of the error, it’s important to understand what protected memory is and how it functions within the context of SQL Server. Protected memory is a security feature of modern operating systems that prevents processes from accessing memory that has not been allocated to them. This is crucial for maintaining system stability and security, as it prevents accidental or malicious interference between processes.

How SQL Server Interacts with Memory

SQL Server is a memory-intensive application that relies heavily on the efficient management of memory resources. It uses a sophisticated memory architecture to cache data, manage transactions, and execute queries. When SQL Server attempts to access an area of memory that the operating system has not granted it, the protected memory error can occur.

Common Causes of Protected Memory Errors

Several factors can lead to the “attempted to read or write protected memory” error in SQL Server 2014. These can range from hardware issues to software conflicts. Here are some common causes:

• Corrupted Memory Modules: Faulty RAM can cause SQL Server to behave unpredictably, leading to protected memory errors.
• Driver Conflicts: Outdated or incompatible drivers, especially those related to storage or network hardware, can cause memory access issues.
• SQL Server Bugs: Certain versions of SQL Server may have known bugs that trigger memory errors, which are typically resolved in subsequent patches or updates.
• Third-party Software: Other applications running on the same server can interfere with SQL Server’s memory allocation, leading to conflicts.

Troubleshooting Protected Memory Errors

When faced with a protected memory error, it’s important to approach troubleshooting methodically. Here are steps to help identify and resolve the issue:

Check for Hardware Issues

Begin by running hardware diagnostics to check for faulty RAM or other hardware problems. Replacing defective components can often resolve the error.

Update Drivers and Software

Ensure that all drivers, especially those related to storage and network interfaces, are up to date. Also, apply the latest service packs and cumulative updates for SQL Server 2014.

Analyze SQL Server Logs

SQL Server logs can provide valuable insights into what the server was doing at the time of the error. Look for patterns or events that may have triggered the issue.

Isolate and Reproduce the Error

If possible, try to isolate the conditions under which the error occurs. This can help in identifying whether the issue is related to specific queries, operations, or configurations.

Preventive Measures and Best Practices

To minimize the risk of encountering protected memory errors, consider the following best practices:

• Regular Maintenance: Perform regular maintenance on your SQL Server instances, including index rebuilds, statistics updates, and consistency checks.
• Monitoring: Implement comprehensive monitoring to track memory usage patterns and catch issues early.
• Resource Management: Properly configure SQL Server memory settings to ensure it does not over-allocate memory resources.
• Security Software: Ensure that antivirus or other security software is configured to exclude SQL Server files and processes from real-time scanning.

Case Studies: Resolving Protected Memory Issues

Real-world examples can shed light on how protected memory errors are addressed in practice. Let’s look at a couple of case studies:

Case Study 1: Faulty Hardware Replacement

A company faced repeated protected memory errors on their SQL Server 2014 instance. After running hardware diagnostics, they discovered a set of faulty RAM modules. Replacing the RAM resolved the errors, and the server returned to normal operation.

Case Study 2: Software Conflict Resolution

Another organization experienced protected memory errors after installing a new piece of software on the same server as their SQL Server instance. By moving the new software to a separate server, they eliminated the memory access conflicts and the errors ceased.

FAQ Section

What does “attempted to read or write protected memory” mean?

This error indicates that SQL Server tried to access a memory area that it was not allowed to, which can lead to various system issues.

Can protected memory errors lead to data loss?

Yes, in some cases, these errors can cause data corruption, which may lead to data loss if not properly managed.

How can I prevent protected memory errors in SQL Server?

Adopting best practices such as regular maintenance, proper monitoring, and careful resource management can help prevent these errors.

Conclusion

“Attempted to read or write protected memory” errors in SQL Server 2014 can be challenging, but with a systematic approach to troubleshooting and adherence to best practices, they can be effectively managed and prevented. By understanding the underlying causes and implementing the right solutions, database administrators can ensure the stability and reliability of their SQL Server environments.