[Zope] looking for advice to fine-tune large AT migration

[Gerry Kirk]

Hi,

I've got about 120K objects in my plone site, and I need to migrate from
AT 1.3 alpha to the latest AT. I tried it last night, and the first
step, migrating schemas, took all night. There is still the catalogs and
references to migrate.

I was quite conservative with transactions. I was doing a full
transaction every 250 objects.

Any suggestions on numbers to use for subtransactions and full ones? My
box has 3GB RAM and a fast P4 CPU.

Thanks,
Gerry