How To Fix DB6628 - There is not enough free space in the database heap

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 628

• Message text: There is not enough free space in the database heap

Copied from DB6 627

What causes this issue?

The database heap is a global area the database uses for memory areas
it administers itself, such as the:
Log buffer
Catalog cache
Control structures for the buffer pool
Instead of monitoring the upper limits, the system monitors here the
current database heap fill level.

System Response

If the database heap is full, transactions may terminated.

How to fix this error?

If there is an error, increase the size of the database heap using:
<LB>UPDATE DB CFG USING DBHEAP <value></>
Increasing this value increases the use of virtual memory, which
increases paging if there is not enough main memory available.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6628 - There is not enough free space in the database heap ?

  The SAP error message DB6628 indicates that there is insufficient free space in the database heap. This can occur in various database systems used with SAP, such as Oracle, SQL Server, or SAP HANA. The database heap is a memory area used for dynamic memory allocation, and when it runs out of space, it can lead to performance issues or prevent new transactions from being processed.
  Cause:
  
  Memory Allocation Limits: The database heap may have reached its maximum allocation limit due to high memory usage by existing processes.
  Long-Running Transactions: Long-running transactions can hold onto memory resources longer than necessary, leading to heap exhaustion.
  Insufficient Configuration: The database may not be configured with enough memory to handle the workload.
  Memory Leaks: There could be memory leaks in the application or database processes that are consuming more memory than expected.
  High Load: A sudden increase in workload or concurrent users can lead to increased memory consumption.
  
  Solution:
  
  
  Increase Database Heap Size: 
  
  Adjust the configuration settings of your database to increase the size of the heap. This can usually be done through the database management interface or configuration files.
  For example, in Oracle, you might adjust the SGA or PGA settings.
  
  
  
  Monitor and Optimize Memory Usage:
  
  Use database monitoring tools to analyze memory usage and identify any long-running transactions or processes that are consuming excessive memory.
  Optimize queries and processes to reduce memory consumption.
  
  
  
  Review and Optimize Application Code:
  
  Check for any memory leaks in the application code that interacts with the database.
  Ensure that resources are being released properly after use.
  
  
  
  Database Maintenance:
  
  Perform regular database maintenance tasks such as reorganization, indexing, and purging old data to free up resources.
  Consider archiving old data that is not frequently accessed.
  
  
  
  Load Balancing:
  
  If applicable, distribute the load across multiple database instances or servers to reduce the pressure on a single database heap.
  
  
  
  Consult Documentation:
  
  Refer to the specific database documentation for detailed instructions on adjusting memory settings and troubleshooting memory issues.
  
  
  
  Related Information:
  
  Database Documentation: Check the official documentation for your specific database system (e.g., Oracle, SQL Server, SAP HANA) for guidelines on memory management and configuration.
  SAP Notes: Search the SAP Support Portal for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Monitoring Tools: Utilize SAP Solution Manager or other monitoring tools to keep track of database performance and memory usage.
  
  If the problem persists after trying these solutions, it may be necessary to consult with your database administrator or SAP support for further assistance.