I added items one at a time until I got to 30, then I did the empty, so I'm pretty sure it wasn't a load request, this is normal. Child entities have 4 fields with one being a list of Strings. There is one index and it is 9% of the overall space.
Thanks, Brian On Thu, Dec 17, 2009 at 1:25 AM, Richard <richard.wat...@gmail.com> wrote: > It's probably that expensive. There are many surprises when using the > datastore! I'd really like to get to grips with exactly what is > causing what performance issues because it still feels a bit > uncharted. > > Possibilities: > Check if this speeds up if you call it a number of times in a row. > Your app might have to load. I'm finding that it unloads very quickly > now - a few minutes, whereas it seemed to take up to 20 min before. I > also feel like repeated calls of a similar kind seem to run faster. > When I turn logging onto "Info" level, I see a few exceptions when > some parts wake up, like queues. Those don't happen after the first > call. > > How many 'columns' do your children have? Each of those have to be > indexed. You can specify that the datastore ignores some columns for > indexing. Do your children have list properties? If so, that expands > the indexes a lot. Look at your data stats to see how much indexes > are taking up compared to data, which should hint at how much the > store is doing behind the scenes. > > Regards, > Richard > > On Dec 17, 7:40 am, Brian Hayward <bhayw...@gmail.com> wrote: >> Am I doing something wrong here? >> >> Parent class with an owned one-to-many relationship containing 30 >> children. calling clear() on the collection and then makePersistent() >> on the parent was: >> >> 1646ms 5065cpu_ms 4560api_cpu_ms >> >> Is it really this expensive? I have timing around the above two >> steps, my logs reported that part alone as 1552ms. >> >> Thanks, >> Brian > > -- > > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
