Richard, Both free and dedicated memcache can disappear at any moment - it happens rarely, but it can happen. The only difference is that with dedicated memcache objects will not be evicted unless you exceed reserved capacity, while with free memcache there is no guaranteed capacity.
20MB is a very small size to worry about. It will be available *almost* always. If *almost* is not good enough for you, then you have to reserve 1GB of memcache. You can always run your app for a few days and see if you get any evictions because of capacity limits. I doubt you will see any. Also, you may consider keeping all 20MB of data in instance memory, which is even faster than memcache and is always guaranteed. The drawback is that each instance will have to load and keep its own copy of this data, and all copies may quickly become out of sync, which may or may not be a problem given your data architecture and requirements. Andrei On Tuesday, March 14, 2017 at 12:56:09 PM UTC-4, Richard Cheesmar wrote: > > > George, sorry but I'm still not clear on this. Are you stating that I have > to pay for 1GB per hour even if I only require 20MB? > > If this is true this seems a tad hard as that 1 GB of dedicated memcache > is going to cost in the region of 45 USD per month. When I only require, > at this stage around 20MB of dedicated memcache, if that. Given this I > would be paying for something I'm not using which hardly seems justified. > > Just to be clear here, that 20MB would be permanent so not in and out of > memcache. > > Can I have a definitive answer on this please. > > Thank you. > > > On Friday, March 10, 2017 at 8:26:47 PM UTC+3, Richard Cheesmar wrote: >> >> In the docs regarding costs, dedicated Memcache is priced at 0.06 USD per >> GB an hour. On the price calculator you can specify MB of memcache per >> hour. So are you charged on a Mb basis per hour if you are using say no >> more than 50MB per hour? >> >> >> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/1cabb3ec-50f1-4ad6-a4ba-faff688dfc38%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
