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I do know that you can use multiple process to one Xvfb, however I am starting to see "User interrupted function" upon a access to the Xvfb. Have I now exceeded some memory limit? This is very intermittent, but appears to happen more when the load is high. I do bang on it very hard, possibly 16 processes hitting Xvfb simultaneously.

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Hi Kim! Could you please link us to the question you mention in the title? – slhck Oct 25 '12 at 16:30

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