1000+ entities on one page? How did you manage that? It really sounds
like architectural flaw. I am writing an app with huge amount of
constantly changing data (that needs to be persisted) and I don't have
that problem.

On Nov 3, 8:21 pm, Xin Liu <v2ex.li...@me.com> wrote:
> My site's typical page is like this:
>
> http://www.v2ex.com/t/7577
>
> As you have seen, a topic with dozens replies, each reply carry 3 entities:
> reply, member and avatar. And there are other supporting dynamic elements
> on the page (most of them can be cached).
>
> But when someone replied to the topic, then it will trigger a lot memcached
> objects to be removed. For hot topics, memcached objects can just survive
> minutes or even seconds.
>
> And there could be 100+ or even 1000+ entities on one page.
>
> If I knew they're going to charge datastore reads/writes, I may think
> another way to write the code. But now, it's too painful to rewrite the
> whole site.

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