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Editorial Team
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Asked: 2026-06-04T01:30:35+00:00

I have a servlet that users post a XML file to. I read that

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I have a servlet that users post a XML file to.

I read that file using:

String xml = request.getParameter("...");

Now say that xml document is 10KB, since I created the variable xml I am now using 10KB of memory for that variable correct?

Now I need to parse that xml (using xerces), and I converted it to a input stream when passing to it to the saxparsers parse method (http://docs.oracle.com/javase/1.5.0/docs/api/javax/xml/parsers/SAXParser.html).

So if I convert a string to a stream, is that doubling my memory usage?

Need some clarifications on this.

If I connect my process with visualvm or jconsole, while stepping through the code, can I see if I am using additional memory as I step through the code in my debugger?

I want to make sure I am not doing this inefficienctly as this endpoint will be hit hard.

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1 Answer

  1. Editorial Team

    A 10,000 bytes of text generally turns into 20 KB.

    When you process text you generally need 2-10x more memory as you will be doing something with that information, such as creating a data structure.

    This means you could need 200 KB. However given that in a PC this represents 1 cents worth, I wouldn’t worry about it normally. If you have a severely resource limited device, I would consider moving the processing to another device like a server.

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