Add a big buffer to a pipe between two commands

There is another tool, pv - pipe viewer:

process1 | pv -pterbTCB 1G | process2

• B specifies the buffer size, here 1 Gigibyte
• C disables splice, which is required for B
• T shows the buffer level
• pterb are the default display switches needed due to the presence of T

pv might be available on systems where mbuffer/buffer is not in the official repositories (such as arch linux).

BUFFER is called buffer. (man 1 buffer, maybe after apt-get install buffer)