> First of all Thomas, thank you very much for your response.
> As I am sure you know there is this 64 bit hype around and people will
> install 64 bit versions of applications just because 64 number is bigger
> than 32 = they think that bigger means better.

In general, they are wrong. ;-)

> But I have my own brain and thought that there is no point for
> installing 64 bit server if single firebird process takes no more than
> 20 MB of RAM.
>
> > I guess you are running with the default 75 page buffers, as well with
> > low in-memory sort settings etc. A great playground for Firebird
> > consulting services. ;-)
>
> Good guess! :-) However I am planning to change that, please take a look
> if you do not mind and this post:
> https://groups.yahoo.com/neo/groups/firebird-support/conversations/messages/124144
>
> Noone has responded me, perhaps for the reason you said - it is a good
> job for a consultant. And noone want to give such advice for free...
>
> However it is hard for me to imagine the set of options in firebird
> config which would cause a single process to take 2GB of RAM.

High RAM utilization doesn't necessary result in best performance.
Usually, already with some conservative base optimization regarding
various Firebird configuration settings, one can achieve good results.

Once you have a base/good Firebird configuration, from my experience,
SQL performance tuning is the most promising and important area to look at.

> > But when you are using third-party UDF libraries, they usually add a
> > dependency on the bitness for the Firebird server anyway. I have seen
> > customers using their home-grown UDF library built with Delphi, thus
> > 32-bit in the old days, which results in using Firebird 32-bit as well.
>
> > You can't use Firebird 64-bit when you are using a 32-bit UDF library
> > and don't have a 64-bit version of the UDF library available. But I
> > guess, you know that.
>
> Yes I know that, I wrote 32 bit UDF and now I am starting to think about
> recompiling it with 64 bit. The reason is that guys from my company are
> installing 64 bit FB in Classic because they think it is better...
>
> Thomas,
>
> how much would you take for an one hour of your consulting time?:)
> Could you send me some offer on my email?

Please contact me offline, if you are *seriously* interested.


--
With regards,
Thomas Steinmaurer
http://www.upscene.com/

Professional Tools and Services for Firebird
FB TraceManager, IB LogManager, Database Health Check, Tuning etc.