11.02.2014 16:49, Juan Pedro Lopez Saez wrote:

>
> I found a strange issue when sweep is executed.
>
> I'm using Firebird 2.5.2 Super Server for Linux AMD 64 bits.
>
> I first execute "SHOW DATABASE" in isql:
>
> PAGE_SIZE 16384
> Number of DB pages allocated = 524480
> Sweep interval = 20000
> Forced Writes are OFF
> Transaction - oldest = 26483174
> Transaction - oldest active = 26483175
> Transaction - oldest snapshot = 26483171
> Transaction - Next = 26483367
>
> Shortly after, I do a manual sweep to the same database. This lines
> appear in firebird.log:
>
> Sweep is started by SYSDBA
> Database "path_to_databse.fdb"
> OIT 26489872, OAT 26489873, OST 26489873, Next 140660205433875
>
> As you can see, it seems to be a huge gap between next transaction and
> the other values.
>
> I guess that is not true, as just some minutes went on from measured
> points.
>
> Is it a normal behaviour?

No, this is a known bug:
http://tracker.firebirdsql.org/browse/CORE-3978


Dmitry