Vinay Sajip <vinay_sa...@yahoo.co.uk> added the comment:

I think it's just a documentation issue. The problem with documenting limits is 
that they are system-specific and, even if the current limits that 
Charles-François has mentioned are documented, these could become outdated. 
Perhaps a suggestion could be added to the documentation:

"Avoid sending very large amounts of data via queues, as you could come up 
against system-dependent limits according to the operating system and whether 
pipes or sockets are used. You could consider an alternative strategy, such as 
writing large data blocks to temporary files and sending just the temporary 
file names via queues, relying on the consumer to delete the temporary files 
after processing."

----------
nosy: +vinay.sajip

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<http://bugs.python.org/issue8426>
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