Resolving TSV_TNEW_PAGE_ALLOC_FAILED: Dynamically Adjusting Memory Quotas with RSMEMORY Without Restarting SAP

1. Symptoms & Memory Allocation Mechanism #

• Category: Resource Bottleneck (memory exhaustion).
• Trigger: Occurs when an ABAP program attempts to expand an internal table via SELECT ... INTO TABLE, APPEND, or INSERT, but the Work Process has reached its memory quota limit or the application server host is out of physical memory.
• Identification in Transaction ST22:
  • Runtime Errors: TSV_TNEW_PAGE_ALLOC_FAILED
  • Short Text: "No more memory available to add rows to an internal table."

Work Process Memory Allocation Order (64-bit Architecture) #

2. RSMEMORY Parameter Mapping (Dynamic vs Static Limits) #

Executing program RSMEMORY (or transaction code SMEMORY) allows SAP Basis administrators to dynamically adjust memory quotas directly within the SAP Kernel runtime memory WITHOUT RESTARTING THE SAP INSTANCE.

However, RSMEMORY only modifies individual Work Process quotas (4 parameters). Host-level and pool-level parameters require modification in transaction RZ10 followed by an instance restart.

Dynamic Parameters Modifiable via RSMEMORY: #

Static Infrastructure Parameters (NOT Modifiable via RSMEMORY): #

[!IMPORTANT]
Ceiling Hierarchy Rule:
Individual heap limits set in RSMEMORY (abap/heap_area_dia or abap/heap_area_nondia) must remain ≤ abap/heap_area_total. If the instance has depleted its global heap budget or exhausted the shared extended memory pool (em/initial_size_MB), expanding quotas in RSMEMORY will not prevent memory dumps.

3. 8-Step Emergency Action Runbook #

Step 1: Analyze the Short Dump in Transaction ST22 #

1. Open transaction ST22 and locate the TSV_TNEW_PAGE_ALLOC_FAILED dump.
2. Note the affected Application Server (e.g., sapapp01_PRD_00).
3. Scroll down to the Memory consumption section:
   • Check the Allocated values for Roll, Extended Memory (EM), and Heap Memory.
   • Determine which threshold was hit (commonly abap/heap_area_nondia or ztta/roll_extension).

Step 2: Verify OS-Level Physical RAM & Swap Space #

[!CAUTION]
Never increase memory quotas if host free RAM is below 10% or swap utilization exceeds 80%. Doing so risks triggering the OS Out-Of-Memory (OOM) Killer, which can terminate critical SAP processes such as disp+work.

• Inside SAP (Transaction ST02): Review the Memory Areas table (Extended Memory, Heap Memory, Swap Space).
• On OS Level (Linux):

  free -h          # Available RAM and swap capacity
  vmstat 1 5       # Paging and swap activity
  top -o %MEM      # Top memory-consuming processes
  

Step 3: Log In to the Specific Affected Application Server #

Note: RSMEMORY applies changes strictly to the local instance where the session is running.

1. Open transaction SM51 and select the affected instance (e.g., sapapp01_PRD_00).
2. Click Logon to establish a session directly on that server.

Step 4: Launch Program RSMEMORY #

1. Within that session, go to transaction SE38 or SA38 → enter RSMEMORY → click Execute (F8).
   *(Alternatively, use transaction code SMEMORY).*

Step 5: Record Baseline Values #

Take a screenshot or record the current default values:

• Quota Dialog: Class 1 (Extended Memory), Class 2 (Heap Memory).
• Quota Non-Dialog: Class 1 (Extended Memory), Class 2 (Heap Memory).

Step 6: Adjust Target Quotas Dynamically #

1. Click Change parameters (F5 or pencil icon).
2. Enter the elevated threshold based on whether the dump occurred in a Background Job or Dialog session:

Example: Increase Non-Dialog Heap from 2,000,000,000 to 4,000,000,000 or 6,000,000,000 Bytes.

3. Press Enter or click Copy / Transfer to commit changes to the runtime Kernel memory.

Step 7: Re-execute the Failed Job #

1. Reschedule the background job in transaction SM37.
   • Crucial: In the job/step definition, explicitly assign the Target Server to the application server instance where quotas were adjusted via RSMEMORY.
2. Monitor memory utilization in transaction SM50 or SM66 (check the Memory (KB) column) until job completion.

Step 8: Revert to Baseline Settings #

[!WARNING]
Always revert to baseline parameters immediately after the critical job finishes. Leaving oversized quotas active long-term allows subsequent unoptimized queries to exhaust system memory.

1. Return to transaction SE38 → RSMEMORY → click Change parameters.
2. Restore the original baseline values recorded in Step 5.
3. Click Copy / Transfer to reinstate standard limits.

4. Permanent Root Cause Resolution #

RSMEMORY is an emergency workaround, not a permanent fix. To permanently address recurring issues:

1. Optimize Custom ABAP Code:
   • Always query large tables using PACKAGE SIZE:

     SELECT * FROM bseg INTO TABLE it_bseg PACKAGE SIZE 5000 WHERE bukrs = '1000'.
       LOOP AT it_bseg INTO wa_bseg.
         " Business logic processing...
       ENDLOOP.
       FREE it_bseg. " Immediately release memory after processing each package
     ENDSELECT.
     

   • Explicitly clear internal tables (FREE itab) when they are no longer needed.
   • Verify loop termination logic in DO and WHILE blocks.
2. Restrict Selection Criteria: Restrict report ranges and enforce mandatory filter fields (e.g., BUKRS, GJAHR, WERKS).
3. Use HANA-Optimized Transactions: Run FAGLL03H instead of legacy FAGLL03.
4. Permanent Profile Parameter Updates (RZ10): Apply permanent increases only if data growth is legitimate and sufficient host physical RAM is available.

5. Profile Parameters & Reference SAP Notes #

Reference SAP Notes #

• SAP Note 20527: Runtime error TSV_TNEW_PAGE_ALLOC_FAILED
• SAP Note 2180736: TSV_TNEW_PAGE_ALLOC_FAILED - FAQ
• SAP Note 181958: Memory management in 64-bit systems
• SAP Note 649327: Analysis of memory consumption in an ABAP session
• SAP Note 133909: Work process in PRIV mode