HANA Database- Column store table delta Merge failed with error "column store error: [2484] not enough memory for table optimization"

The error "column store error: [2484] not enough memory for table optimization" in SAP HANA indicates that the system does not have enough memory available to perform a delta merge operation. Here are some steps you can take to address this issue:

1. Check Memory Allocation and Usage

• Monitor Memory Usage: Use the SAP HANA Studio or SAP HANA Cockpit to monitor memory usage. Check the Allocated Memory, Used Memory, and Free Memory.
• Increase Memory Allocation: If possible, increase the memory allocation for the HANA system. This may involve adding more physical RAM to the server or adjusting HANA configuration settings to allocate more memory to the database.

2. Optimize Table Design and Indexes

• Table Partitioning: If the table is very large, consider partitioning it. Partitioning can help manage memory usage more efficiently.
• Column Compression: Ensure that columns are using appropriate compression methods to reduce memory footprint.

3. System Configuration

• Parameter Tuning: Review and adjust the HANA database parameters related to memory management. Parameters such as global_allocation_limit and delta_merge_threshold can be tuned to optimize memory usage.
• Unload Unused Tables: Unload tables that are not currently in use to free up memory.

4. Manage Delta Merges

• Manual Delta Merge: If automatic delta merges are causing memory issues, consider performing manual delta merges during off-peak hours when system usage is low.
• Delta Merge Configuration: Adjust the frequency and threshold of delta merges to better fit your system's memory capacity.

5. System Housekeeping

• Cleanup Unused Objects: Remove or archive unused tables, indexes, and data that may be consuming memory unnecessarily.
• Reclaim Memory: Use HANA's garbage collection and memory reclaim processes to free up memory from deleted or outdated objects.

6. Hardware Upgrade

• Increase Physical Memory: If the system consistently runs into memory issues, it may be necessary to upgrade the server's physical memory.

7. SAP Support

• Open a Support Ticket: If the issue persists and cannot be resolved with the above steps, consider opening a support ticket with SAP for further assistance.

Monitoring Tools:

• SAP HANA Studio: Use the performance tab and memory overview to track memory usage.
• SAP HANA Cockpit: Provides a detailed view of memory consumption and other performance metrics.

By following these steps, you should be able to diagnose and resolve the memory issue affecting the delta merge operation in your SAP HANA database.