Error: Thread creation failed: Cannot allocate memory

I have deployed my Rails application on server.

It is working fine, but it crashed on sign_up page and server will be stop.

I Checked my mongrel.log file, it give the following error.开发者_StackOverflow

libgomp: Thread creation failed: Cannot allocate memory

How can I resolved this error?

Thanks.

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Guess what. Your server is OOM.