Would I be wrong then to assume that session requests are likewise impacted because like memcache sessions are also backed by the datastore?
On Wed, Mar 2, 2011 at 12:04 PM, Simon Knott <knott.si...@gmail.com> wrote: > HR instances definitely seem to last longer than M/S ones - I've had > instances last for days on my HR app, which is only in development. > However, that's highlighted a strange problem in that you seem to be > "charged" for idle instances. > > The very rough idle "costs" are: > > 1hr idle = additional 2000 CPU_ms for next request > 2hr idle = additional 4000 CPU_ms for next request > 4hr idle = additional 8000 CPU_ms for next request > ... linear increase to: > 24hr+ idle = additional 45000 CPU_ms for next request > > This probably isn't a major problem for apps which are busy, but it should > be taken into account for small apps I guess! > > Another thing I've noticed is that HR apps have additional latency for > MemCache API calls in the region of 2-10 times longer. I've tested my app > in both M/S and HR and the HR version consistently has MemCache API Gets > taking 20ms on average, for tiny amounts of data, which only take 4ms on the > M/S version. > > Loading requests seem quite long on HR instances as well, almost double > that of the M/S. > > *NB. *It should be noted that all of my experience is based on a single > app which is still in development, so all of my observations may not ring > true for real-life, high-throughput apps. > > -- > 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 > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- *Jeff Schwartz* http://jefftschwartz.appspot.com/ http://www.linkedin.com/in/jefftschwartz follow me on twitter: @jefftschwartz -- 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 google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
