Hi,

I am having a problem to find out why same requests to different front
ends take much longer to respond. On average 1 request  will take
175ms but some times it can take 800ms - 5sec.

A test with ajax request executed every 1 second. 1-3 out of 10 ajax
requests request will take 800ms or even longer, but others will do
the response on average 175ms

QPS*    Latency*        Requests        Errors  Age     Memory  Availability
0.033   43.5 ms 294     0       11:35:20        42.3 MBytes     Resident
0.000   0.0 ms  83      0       11:35:20        40.9 MBytes     Resident
0.017   2319.0 ms       125     0       11:35:20        41.7 MBytes     Resident
0.483   31.0 ms 2835    0       2:22:29 100.6 MBytes    Dynamic
0.550   25.4 ms 2530    0       2:05:09 93.4 MBytes     Dynamic
0.617   37.0 ms 2649    0       2:20:25 92.7 MBytes     Dynamic

I have added profiler and found that execution/prcessing/cpu time is
exactly the same within different front ends but response time varies
a lot!
As you can see one of the frontends has latency on average 2319.0 ms!
Why is that? Are there any issues with internal GAE network latency,
maybe within datacenters?


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