D365 Finance - High Memory Usage on AOS server When Posting Free Text Invoices in Batch (increasing until failure)

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Hi Sonja Johansson

Thank you for reaching out to Microsoft Q&A forum

Please understand that  Microsoft Dynamics 365 is currently not supported on this Microsoft Q&A forum. So, I suggest you start a new discussion in the Find Answers | Microsoft Dynamics 365 Community on this issue so that you can get more professional help, there will be very professional people who might be able to provide more detailed guidance or share best practices for handling this type of data transfer.  

Hope you can get the definitive solution for this concern soon

Best regards

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This is for Dynamics 365 FO

The described behavior matches a product issue pattern seen in other Dynamics AX/Finance scenarios where batch posting or reporting operations cause excessive resource consumption (CPU/memory) on AOS and eventually fail. In the provided context, similar issues are documented for:

• AOS crashes when many batch IL threads are run on high‑core machines in Microsoft Dynamics AX 2012.
• Performance issues when printing large volumes of customer account statements in Microsoft Dynamics AX 2012 R2.
• Slow performance when posting large general journal batches in Microsoft Dynamics NAV 2013.

In all these cases, Microsoft has confirmed them as product issues and addressed them via hotfixes or cumulative updates.

Given that the high memory usage and failure started specifically after installing version 10.0.46 and is reproducible both on‑premises and in cloud, the supported next steps based on the pattern in the context are:

1. Treat this as a likely regression/defect introduced in 10.0.46 affecting batch posting of free text invoices via CustPostInvoiceJob.
2. Open a support case with Microsoft (through the standard Dynamics 365 Finance support channel) and provide:
   • Exact application/platform build including 10.0.46 details.
   • Repro steps (Post free text invoice form → batch job using CustPostInvoiceJob).
   • Environment type (on‑prem and cloud) and AOS topology.
   • Memory usage traces and any crash dumps from the AOS server.
3. Request confirmation whether this is a known issue in 10.0.46 and whether a hotfix or later build (PU) is available that resolves the memory leak/high memory consumption during free text invoice batch posting.
4. Until a fix is available, consider operational mitigations similar to those used in other Dynamics performance issues:
   • Reduce the batch size/number of invoices per run.
   • Schedule more frequent, smaller batch jobs instead of large single runs.
   • Limit parallelism (number of batch threads) for this job to reduce peak memory pressure.

These steps align with how Microsoft has handled comparable AOS/batch performance and resource‑consumption issues in the referenced Dynamics articles.

References:

• AOS crashes when many batch IL threads are run on a high-core computer in Microsoft Dynamics AX 2012
• You experience slow performance when you post a large general journal batch in Microsoft Dynamics NAV 2013
• Performance issues when printing for over 8000 customer account statements in Microsoft Dynamics AX 2012 R2
• Create a free text invoice