I too have set up/administered a Zimbra installation.  It is a huge
resource hog, but it is a beauty to work with when it has what it
needs.  Setting up multiple domains was a snap.  I was able to offload
pretty much all the tedious mail admin stuff to a non tech person and
he ran with it so it was a real help for me.

Sean

On Wed, Dec 16, 2009 at 10:28 PM, Kurt Granroth
<kurt+plug-discuss@granroth.com> wrote:
> On 12/16/09 10:08 PM, Dazed_75 wrote:
>> My ISP (mediacom) apparently switched their email systems to zimbra and
>> things have not worked right ever since.  Service has been intermittent
>> and poor at best for a week now.  Zimbra.com claims to service 50
>> million paid email accounts so I have a hard time believing this is so
>> bad inherently.  I am thinking it is all poor planning and execution of
>> the switchover and with no fallback plan.
>>
>> But I thought some of you might have experience with Zimbra that you
>> could share.
>
> I love (loved) Zimbra.  I actually switched from using a shared hosting
> environment to a virtual private server just so I could setup and use
> Zimbra for all of my mail and calendaring.  This was version 4.5
> "community edition" (i.e., the open source version).  I see that they
> are up to 6.0 now.
>
> Alas, I had to jettison the entire installation.  Why?  Because Zimbra
> is a *pig* when it comes to resource usage.  I've never seen a single
> (non-VM) application use more than 1 gigabyte of memory just for
> itself... and that's just for the java parts.  That doesn't even count
> how much memory the related (but necessary) services like postfix,
> mysql, etc all use.  I had a VPS with 1GB and it just couldn't handle
> Zimbra.  I think they recommend 4GB and they're not kidding.
>
> So... if you are having poor service, then I would guess that your
> provider just didn't allocate enough resources for it.  It works like a
> charm (very powerful; very robust) with enough horsepower behind it.
> But if you skimp, it'll feel like you are running on an old 286.
>
> Kurt
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