Thanks for your reply, Jon, but I don't have any entity groups with more than one entity right now. I had the same thought a while back, and haven't been using any entity groups or ancestors since 2 months ago, but nothing changed. These timeouts are happening when putting single entities.
Alex On Wed, Oct 8, 2008 at 12:38 AM, Jon McAlister <[EMAIL PROTECTED]> wrote: > > Hi Alex, sorry for the frustrations this is causing. The first thing I > would check for here is to verify that these writes are not failing > due to entity group contention. (documentation on entity groups: > http://code.google.com/appengine/docs/datastore/keysandentitygroups.html#Entity_Groups_Ancestors_and_Paths). > All writes within one entity group are optimistically serialized. You > mention that a good write latency is 100ms. So, if you ever try to do > more than 10 writes in one second you will experience transaction > retries and eventually you will hit the datastore timeout. Note that > even put() and get_or_insert() are still considered transactions in > our system. > > On Oct 7, 2:48 pm, Alex Epshteyn <[EMAIL PROTECTED]> wrote: >> As an example, of how frequently datastore write timeouts are >> happening on app engine, here are the last 20 entries in my production >> error log, showing 20 timeouts in 15 minutes! >> >> I'm hoping the Google team will break their silence about this and at >> least acknowledge the problem. >> >> Developers: please star issue >> http://code.google.com/p/googleappengine/issues/detail?id=764 >> if you are also experiencing this problem. >> >> 10-07 02:20PM 48.172 /games 500 4040ms 11285mcycles 0kb >> 10-07 02:20PM 48.172 /games 500 4040ms 11285mcycles 0kb >> 10-07 02:16PM 43.763 /games 500 2813ms 8253mcycles 0kb >> 10-07 02:16PM 43.410 /games 500 3078ms 8909mcycles 0kb >> 10-07 02:16PM 40.958 /games 500 3084ms 8915mcycles 0kb >> 10-07 02:15PM 03.499 /games 500 4109ms 12077mcycles 0kb >> 10-07 02:15PM 02.584 /games 500 4110ms 12365mcycles 0kb >> 10-07 02:14PM 21.732 /games 500 3071ms 8900mcycles 0kb >> 10-07 02:10PM 52.865 /games 500 4045ms 11287mcycles 0kb >> 10-07 02:10PM 51.875 /games 500 4041ms 11285mcycles 0kb >> 10-07 02:10PM 41.774 /games 500 4036ms 11282mcycles 0kb >> 10-07 02:10PM 36.958 /games 500 4033ms 11279mcycles 0kb >> 10-07 02:10PM 23.148 /games 500 4039ms 11174mcycles 0kb >> 10-07 02:08PM 31.288 /games 500 4068ms 10555mcycles 0kb >> 10-07 02:08PM 30.842 /games 500 4449ms 12217mcycles 0kb >> 10-07 02:07PM 27.179 /games 500 4047ms 11285mcycles 0kb >> 10-07 02:07PM 24.828 /games 500 4047ms 11284mcycles 0kb >> 10-07 02:07PM 20.139 /games 500 4061ms 11281mcycles 0kb >> 10-07 02:07PM 18.532 /games 500 4042ms 11246mcycles 0kb >> 10-07 02:07PM 08.776 /games 500 4048ms 11285mcycles 0kb >> 10-07 02:05PM 58.206 /games 500 4047ms 11019mcycles 0kb >> >> On Oct 6, 1:53 am, Alex Epshteyn <[EMAIL PROTECTED]> wrote: >> >> > Please see:http://code.google.com/p/googleappengine/issues/detail?id=764 >> >> > There is a recent thread on this group titled "Why Google App Engine >> > is broken and what Google must do to fix it." I personally don't >> > think that any of the topics raised by the OP of that thread imply >> > that anything is broken - they are just feature requests. >> >> > What *is* broken, however, is writing to the Datastore. Lots of >> > developers, not just me, have been complaining about this here for >> > months. I don't think there's been any real response from the Google >> > team about this. This issue needs to be investigated and hopefully >> > fixed before App Engine can be used for production. The probability >> > of failure for any given data write request is just too high right >> > now. I actually *am* using App Engine in production and somewhat >> > regretting it, mostly due to this issue. > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
