On 20 February 2010 21:21, kang <areyouloo...@gmail.com> wrote:
> I'm going to clear the datastore. I use the following code:
> old_date = datetime.datetime(2009,10,1)
> old_updates = SomeUpdate.all().filter("updated <",old_date).fetch(20)
> db.delete(old_updates)
> it costs me nearly 1982cpu_ms 1945api_cpu_ms every time. Is it normal?
You might be able to save some time by using a keys_only query. See
this for details.
http://code.google.com/appengine/docs/python/datastore/modelclass.html#Model_all
Cheers,
Andy
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