DocumentationAEM 6.5User Guide

Enable multi-threaded file conversions enabling-multi-threaded-file-conversions

Last update: October 9, 2026
  • Applies to:
  • Experience Manager 6.5

CREATED FOR:

  • User
  • Developer

PDF Generator can run multiple file conversions concurrently to improve conversion throughput. Choose the applicable conversion mode:

Conversion mode
Applications that support concurrent conversions
User account model
Multi-user mode
OpenOffice
A separate user account runs each OpenOffice instance.
Single-user mode
Microsoft® Word and Microsoft® Excel
One user account runs multiple Word and Excel instances. PowerPoint conversions remain serialized.

Before enabling either mode, complete the PDF Generator pre-installation configuration for the applications and operating system that you use. For supported application versions, see Software support for PDF Generator.

Multi-user mode multi-user-mode

In multi-user mode, PDF Generator launches each OpenOffice instance under a separate user account. Configure enough valid administrative user accounts for the number of concurrent conversions that you require. In a cluster, configure the same accounts on every node.

On Windows, ensure that the PDF Generator users have the Replace a process level token privilege and complete the applicable User Account Control configuration described in Configure Document Services.

OpenOffice conversions openoffice-conversions

Configure one PDF Generator user account for each OpenOffice instance that can run concurrently. Install OpenOffice in a location that every configured user can access, and dismiss the initial OpenOffice activation dialogs for each user.

For UNIX-based systems, complete the OpenOffice installation and user-permission requirements in Configure Document Services.

Single-user mode on Windows single-user-mode-on-windows

Single-user mode lets PDF Generator run concurrent conversions under one configured user account.

In this mode, multiple instances of Microsoft® Word (DOC and DOCX) and Excel (XLS and XLSX) run under the same user. Microsoft® PowerPoint (PPT and PPTX) does not support single-user mode. PDF Generator launches only one PowerPoint instance at a time, so PowerPoint conversions are serialized.

To enable single-user mode for Word and Excel conversions:

  1. In the administration console, navigate to Home > Services > Applications and Services > Service Management.

  2. Filter for PDF Generator and select GeneratePDFService.

  3. On the Configuration tab, configure the following options:

    • Set Enable Single User Mode For PDFMaker to true.
    • Set PDFMaker Pool Size to the maximum number of Word instances that can run conversions concurrently.
    • Set Enable Single User Mode For Native2PDF to true.
    • Set Native2PDF Pool Size to the maximum number of Excel instances that can run conversions concurrently.

  4. Restart the AEM Forms server.

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