Hello, On Tue, Jun 18, 2013 at 3:09 PM, burlug <[email protected]> wrote:
> Last two weeks every morning around 9/9.30h in my timezone (=around > midnight Pacific Time) our app encounters a very high increase in latency. > Can not find the reason because the load is very low. Despite the low load > three instances are created, as shown in the graphs below (taken on june > 14th), and requests seem to take up to almost 15000ms ?! I have to admit we > are still running the deprecated Master/Slave datastore (because we are > still doubtful about some HRD restraints). But still, the behaviour is > inexplicable for us. > A few things: 1. First the standard disclaimer: Move off of M/S. It introduces unpredictable issues and isn't getting the warm tender care that HRD gets. (Side note: Feel free to ignore the above, because I'm a hypocrite on this issue and still run some applications on M/S. But I have to write the obvious because if I don't, someone else will and they might be meaner than I am :-) ). 2. The problem you describe has been commented on before, see here: https://groups.google.com/d/msg/google-appengine/Y6i9BYQG0Ws/Piu1heTI5fAJ . The key here is that it occurs around midnight Pacific Time; App Engine resets the daily billing cycle at that time (reset quotas, etc) and it causes some lag. You can follow up on this issue report: https://code.google.com/p/googleappengine/issues/detail?id=8901 (Issue 8901: Elevated serving latencies experienced consistently around 00:00 PST ) ----------------- -Vinny P Technology & Media Advisor Chicago, IL App Engine Code Samples: http://www.learntogoogleit.com -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/groups/opt_out.
