--- In firebird-support@yahoogroups.com, "Ian A. Newby" <iann@k...>
wrote:

> Hi Alexander,
> What is the page size of your database? Could it be that the
> records are too big to be kept on a single page?

Hi Ian. No, this is narrow table - few integers, doubles, timestamps
and chars(6), page size is 8K. No low selective indices. Operations
are typical, enduring sweep occures very seldom and all additional
conditions (transactions gap etc) are approximately the same as in
usual normal behaviour. I hope reason was fixed during general
improvement in FB1.5 and this will disappear after final migration of
production server.

Best regards,
Alexander.