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And if so, how do we increase it - the named pipes are created using mkfifo command -

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If you are suggesting creating so many that you would worry about running into a limit, I would suggest that your system architecture is wrong! You shouldn't need more than a handful. – Caleb Jun 3 '11 at 20:32
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Since everything in linux is a file and fifi named pipes are files, i think there's no maximum number of named pipes ...

However it depend if you want to create a huge number of named pipes in the same directory could be a limit that that is a constraint of some File system ...

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thats what my conclusion was as well - thanks - – Ryan Oberoi Jun 3 '11 at 20:25
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Each end of the pipe uses a file descriptor. On your system check out /proc/sys/fs/file-max.

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