||                                    ||      DB size ||  logsize ||  rate    ||
|| Before (with transactions)         ||      .33GB   ||   3.0GB  ||  17477/s ||
|| No Transactions (with this fix)    ||      .43GB   ||   0GB    || 104124/s ||
|| After removing undo info (#775)    ||      .33GB   ||   1.4GB  ||  25696/s ||
|| After optimizing commit (#725)     ||      .43GB   ||   0.6GB  ||  39909/s ||

The file size is a larger, but the logs are a lot smaller.

Addresses #725, #775.

Manipulations:
{{{
$ (cd tokudb; svn merge -r3763:3778 https://svn.tokutek.com/tokudb/tokudb.725)
$ svn delete tokudb.725
}}}


git-svn-id: file:///svn/tokudb@3779 c7de825b-a66e-492c-adef-691d508d4ae1