Just a report & workaround fyi for anyone running into the same problem:
I created a db consisting of a single, fairly small table (4 fields of
short strings & a few floats) and imported a large amount of data into
it (over a million records). Added a few indexes. The db size is about
Upon trying to access the data, my sql methods puked - got some memory
errors sometimes, sometimes there was something wrong with a "query"
variable or something. I did not dig deep on those. Alas, upgrade to
Zope 2.7.8 seems to have solved the problem. And there was much joy.
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