Thanks Sean for the tip. Unfortunately it did not make a difference.

Adriano: Yes, some of the tables involved use blobs. The max varchar
I am using is varchar(1600) for a few tables in addition. In this
commission calculation operation there are appoximately 30 tables
involved with 3 to 15 fields.

Has anybody else any further tips what could be done?

Regards
Daniel Putra

--- In firebird-support@yahoogroups.com, "Leyne, Sean" <Sean@...>
wrote:

>
> Daniel,
>
> > MaxFileSystemCache = 524288
>
> Use the default value for this setting!
>
>
> Sean
>