Wednesday, February 24, 2016, 12:22:31 PM, Hugo Eyng wrote:

> Hello.

> I tried to restore a backup using the -BU 200000 switch and gbak
> returned an error message: invalid parameter.

That is not a gbak message. If you are using a third-party tool, it
is likely to be some limit imposed by that - or a bug?

> Then I change the value 200000 by 120000 and gbak worked.

> Is it a limitation?

With Firebird 2.5.5 64-bit, I am able to execute this with no error:

gbak -c -bu 800000 h:\data\backups\backup20160131.fbk
h:\data\restores\restored20160224.fdb -user sysdba -password xyxyxyxy

(Although I cannot think why I would want such a huge number of pages
in the cache, not even 120000!!)

HB