Documentation / config / splitindex.txton commit log: really flip the --mailmap default (f3eda90)
   1splitIndex.maxPercentChange::
   2        When the split index feature is used, this specifies the
   3        percent of entries the split index can contain compared to the
   4        total number of entries in both the split index and the shared
   5        index before a new shared index is written.
   6        The value should be between 0 and 100. If the value is 0 then
   7        a new shared index is always written, if it is 100 a new
   8        shared index is never written.
   9        By default the value is 20, so a new shared index is written
  10        if the number of entries in the split index would be greater
  11        than 20 percent of the total number of entries.
  12        See linkgit:git-update-index[1].
  13
  14splitIndex.sharedIndexExpire::
  15        When the split index feature is used, shared index files that
  16        were not modified since the time this variable specifies will
  17        be removed when a new shared index file is created. The value
  18        "now" expires all entries immediately, and "never" suppresses
  19        expiration altogether.
  20        The default value is "2.weeks.ago".
  21        Note that a shared index file is considered modified (for the
  22        purpose of expiration) each time a new split-index file is
  23        either created based on it or read from it.
  24        See linkgit:git-update-index[1].