Skiplist / best practice for 2.1 branch

[Patrick Boutilier]

Henrique de Moraes Holschuh wrote:
>
> For Linux:
>   1. Heavily tested and debugged AND patched BerkeleyDB 3.2, stay away from
>      4.x for now.
>      (i.e. use the ones from RedHat or Debian, not upstream).
>   2. Linux stability patches for Cyrus (see the Debian Cyrus package :-)
>      Cyrus upstream source works wonderfuly on Solaris, but not in Linux.
>      I think some of the RPMs distributed by people in this list have many,
>      if not all the patches recommended by me and the fastmail.fm crew.
>

I tried those stability patches and they didn't help. The only thing 
that stopped lmtp from hanging was switching from db3_nosync to 
skiplist. What are the advantages of using db3_nosync over skiplist?