[ZODB-Dev] Blobstorage shrinks only after the second pack operation - bug or feature?

[Andreas Jung]

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Jim Fulton wrote:
> On Sun, Dec 30, 2012 at 3:50 AM, Andreas Jung <lists at zopyx.com>
> wrote:
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>> 
>> I noticed a strange behavior with packing a storage having lots of
>> data in a blob storage (Plone 4.2, Zope 2.13).
>> 
>> I had a large Plone site (5 GB of data in blobstorage) in a
>> dedicated storage. I removed the Plone Site object and packed the
>> storage through the Zope 2 database management screen. The size of
>> the Data.fs went down however the blobstorage size remained the
>> same. Packing a second removed the obsolete data from the blob
>> storage.
>> 
>> So why do I have to pack two times in order to get a minimized
>> blob storage?
> 
> Without knowing more details, it's impossible to know.
> 
> What did you have pack-keep-old set to?

I used the default of the Zope 2 UI which is 0 (days).

Andreas
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