> On Apr 9, 2015, at 11:01 AM, Nick Upson [email protected] [firebird-support] 
> <[email protected]> wrote:
> 
> to make sure I've got this right

Not quite.
> 
> starting with the same database I can do either
> 
> a) gbak with gc

Won't advance the oldest active
> 
> b) gbak without gc and gfix -sweep

Will move the oldest active and will get a few more records than a)
> 
> and I will have the same final result

Best is gback with garbage collect plus sweep:  moves the oldest actives, gets 
the most old versions, shouldn't take much longer since the sweep doesn't do 
much.
> 
> 
> Extending this further, how can identify which tables contain (or did 
> contain) the garbage. 

gstat shows the number of versions present before you start.
> 
> 

good luck,

Ann
> 

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