Bakul Shah wrote: |On Mon, 13 Oct 2014 12:15:31 EDT erik quanstrom \ |wrote: |> On Sun Oct 12 14:37:47 EDT 2014, steve@quintile.net wrote: |>> I am fairly sure the problem is to do with RAM size rather than the ras= |> pberry pi per-se. |>> 4000 messages takes up a lot of space - and upas stores messages in RAM= |> . |> |> it's a little worse than this, actually. |> the solutions to this are straightforward |> (1) store one message per file, | |This is what MH (an old mail client) does by default. | |> (2) cache important data in an index to avoid opening all files, | |This is what dovecot (an imap/pop3 server) does. Jamie Zawinski implemented that for Netscape 2.0/3.0 [1] but still went for MBOX format. But of course that wasn't designed for Plan9 and permanent backup storage. The page says Right now I'm looking at a folder in 3.0. It has 15,466 messages in it. Selecting this folder takes less than a second (it's hard to eyeball it, but I'd say it takes about 1/2 to 3/4 second from when I click to when I see the message summary on the screen). The BSD mbox file is 57.2MB (1.2 million lines) and the summary file is 1.3MB (2% of the size of the folder.) This is on a P266 with a local IDE disk (Linux.) [1] --steffen