166 IBM Content Manager OnDemand Guide
7.2.1  Limitations
The maximum input file size that is supported by PDF Indexer is 4 GB. The amount of data 
that can be processed from an input file is also limited by the amount of memory that is 
available on the server on which you are running the PDF Indexer. The maximum size of a 
single document within the input file that can be loaded into Content Manager OnDemand is 
2 GB; however, we suggest that the size of a single PDF document does not exceed 50 MB.
Secure PDF documents are not supported. PDF Digital Signatures are not supported. If a 
PDF document contains a digital signature, after indexing, the .out file does not contain the 
digital signature. To load a file that contains a PDF Digital Signature, create a generic index 
file for it, and load the file as one document.
7.3  Performance considerations
The best performance of the PDF Indexer is on the Windows platform. For the preferred 
performance practices, see 13.4.1, “PDF data” on page 308.
7.3.1  PDF fonts and output file size
The fonts that are used in a PDF document are one of the factors that determines the 
indexing’s output file size. 
The base 14 Type 1 fonts
The base 14 Type 1 fonts are a core set of fonts that are always available to the Acrobat 
program. Because they are available on the system, they are not embedded in the document. 
Therefore, documents that are created with these fonts are more compact. The base 14 fonts 
are listed:
/SM590000Courier
/SM590000Courier-Bold
/SM590000Courier-BoldOblique
/SM590000Courier-Oblique
/SM590000Helvetica
/SM590000Helvetica-Bold
/SM590000Helvetica-BoldOblique
/SM590000Helvetica-Oblique
/SM590000Times-Roman
/SM590000Times-Bold
/SM590000Times-Italic
/SM590000Times-BoldItalic
/SM590000Symbol
/SM590000ZapfDingbats
Fonts that are not members of the base 14 fonts might be embedded in the document, or they 
might be stored in a font directory. 
Images and bar code fonts are also embedded in the document.
The PDF Indexer collects resources, such as fonts and images, removes them from the 
document, and places them in a resource file. The number of embedded fonts in the 
document directly affects the size of the resource file.