Patrick Ben Koetter:
> * Viktor Dukhovni <postfix-users@postfix.org>:
> > On Mon, Jun 12, 2017 at 10:32:18AM +0200, Patrick Ben Koetter wrote:
> >
> > > * Julian Kippels <kipp...@hhu.de>:
> > > > would it be faster to have several smaller files for alias_maps and
> > > > transport_maps for each virtual domain, or have one giant file each with
> > > > all users domain from all virtual domains in one file? Around 90% of
> > > > traffic is for one domain and the rest is split among 32 other domain.
> > >
> > > Hard to tell. If they are static, binary maps Postfix will read them all
> > > into
> > > memory and work with the in memory copies. So you don't gain any speed
> > > improvements from a giant file.
> >
> > A single CDB, LMDB or Berkeley DB file is much more efficient than
> > multiple smaller files.
>
> At which message throughput rate will this make a difference?
Always. Because you're replacing hashing with linear search.
Wietse
