John, by default MemcacheServiceException should not be thrown and take down anyone's site. It's a bug (that has affected my site in the past too).
I've filed a bug report here: http://code.google.com/p/googleappengine/issues/detail?id=6236 On Dec 15, 7:58 am, John <[email protected]> wrote: > When it comes to writes I call it the "times two phenomenon". I have NO > IDEA why you can't do anything that is not 2 writes??? > > e.g. > If you have a very simple Entity with 5 properties (none set to the NON > default status of Unindexed) and you save it, it is 12 writes. > > Key <http://localhost:8080/_ah/admin/datastore?&kind=Test&order=__key__>Write > OpsID/Name<http://localhost:8080/_ah/admin/datastore?&kind=Test&order=__key__> > firstName<http://localhost:8080/_ah/admin/datastore?&kind=Test&order=firstName> > four <http://localhost:8080/_ah/admin/datastore?&kind=Test&order=four> > lastName<http://localhost:8080/_ah/admin/datastore?&kind=Test&order=lastName> > six > <http://localhost:8080/_ah/admin/datastore?&kind=Test&order=six>three<http://localhost:8080/_ah/admin/datastore?&kind=Test&order=three> > agtwaXhvdG8tbGl2ZXILCxIEVGVzdBiNAQw12141JoedoorBobsticksfree > > So you get slammed with 12 writes. Each property is 2 writes. > > Here is a PropertyLess Entity > Key<http://localhost:8080/_ah/admin/datastore?&kind=PropertyLess&order=-_...>Write > OpsID/Name<http://localhost:8080/_ah/admin/datastore?&kind=PropertyLess&order=-_...> > agtwaXhvdG8tbGl2ZXITCxIMUHJvcGVydHlMZXNzGI4BDA2142 > > 2 writes. Who needs properties anyhow? That would mean you could query on > them. Queries return results, results are reads. Reads cost money. > > Oh wait, that is what memcache is for... wait a sec, memcache took down my > whole site Monday from MemcacheServiceExceptions > > http://code.google.com/status/appengine/detail/memcache/2011/12/12#ae... > > "Also in my app app engine often spins up idle instances (that I cannot get > rid of no matter what I configure) and send them exactly 1 request every 15 > minutes so that I'm being charged the whole time for this instance I don't > want." > > This happens to me also... Why is it if you have 6 instances, 2 of them get > most of the requests 3 of them get none and occasionally App Engine will > start up a 7th instance while the idle 3 still get nothing? > > Don't get me wrong. I LOVE what App Engine stands for and I have all the > respect in the world for the App Engine team. BUT, I have been through SO > much grief ranging from random app engine problems to having to migrate to > an HR datastore to dramatic increases in pricing. When I signed up for > this (old pricing), I thought the pricing would eventually get better > (almost like gmail and disk space), but instead it went the opposite. Had > my experience been perfect here and my app had run flawlessly all this > time, I would have had no gripes and shut up and spent the extra cash > without blinking. But, instead I have experienced hair loosing problems, > massive variations in performance and got stuck with a much larger bill. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. 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.
