JAVA heap space memory issue

I have an XML file of approximate 1 GB size.

I have used xmlread command in my script which always leads to below error:

Java exception occurred:

java.lang.OutOfMemoryError: Java heap space

I maximized the Java Heap Memory under Preferences to 4016 MB.But I am still getting the same issue.

Any work around?

Answer 1

[Kevin Gurney]

You could try using the newer MATLAB APIs for XML Processing (MAXP) or readstruct rather than xmlread. Neither of these interfaces use Java under the hood.

However, there is still a possibility of out of memory issues if your XML file is too large relative to the amount of available memory on your machine.

MAXP Example:

import matlab.io.xml.dom.*
filename = "data.xml"
dom = parseFile(Parser, filename);

readstruct Example:

filename = "data.xml"
s = readstruct(filename);

Ultimately, if your XML file is too large to load into memory all at once, then you may need to use a streaming / "chunk"-based parsing approach. For example, you could try to leverage a SAX based Java parser or other third party SAX parser to only read parts of the file at a time to decrease maximum memory usage.