On Wed, 2007-08-22 at 21:55 -0700, WJCarpenter wrote: > I realize it's hard to be precise about this, but does anyone have a > feel or rule of thumb for a couple of aspects of indexing overhead? > > 1. Proportionally, how much space does it take for all 4 files? If I > want to give my users a quota of 100 MB for messages, how much real > space should I plan for so that I won't run out of space for indexing?
It really depends on what IMAP client is being used. Something like 10-20% maybe. > 2. What's the overhead in rebuilding index files? Suppose I use an > LDA other than dovecot, so at least the INBOX index is frequently > getting out of date. Does it cost much (in CPU, memory, and disk IO) > to rebuild the index files? (I'm using maildir.) Indexes aren't normally "rebuilt", they're "updated". And the update overhead is practically nothing with maildir. I just wrote this: http://wiki.dovecot.org/LDA/Indexing
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