Hoping someone from Google will give some explanations about these bad
numbers...
On Wednesday, November 28, 2012 9:41:14 AM UTC+1, Francois Masurel wrote:
>
> I can confirm that too. It's pretty annoying.
>
> François
>
> On Saturday, November 24, 2012 1:43:35 AM UTC+1, Per wrote:
>>
>>
>> Hi App Engine team,
>>
>> my Pingdom stats for a JSON request that does nothing at all has doubled
>> (on average) since November 19.
>>
>> Since your post-mortem for the recent outage mentions you made a poor
>> performance config-change on that day, I'm pretty sure it has to do with it:
>>
>> * Our app ("small-improvements-hrd") is on a custom domain, and it's on
>> https
>> * Appstats confirms that these no-op requests do nothing (except create a
>> session) and they take some 100 to 200ms to do so
>> * The time in the log file is shown as 500 to 2500ms though
>> * And Pingdom consistently shows 200 to 2500ms as well
>> * Our average per Pingdom was 700ms until November 19, and now it's
>> 1400ms.
>>
>>
>>
>> <https://lh3.googleusercontent.com/-z3biVzfKyqk/ULAWzA-2jAI/AAAAAAAAAFM/RZC5_qkkg-E/s1600/Response+Time+Report+noop.png>
>>
>>
>> It's as if one extra roundtrip was added somewhere. Maybe the algorithm
>> you described in the post-mortem *still* does something very inefficient?
>>
>> Just to be sure, our other Pingdom check (which pulls our website front
>> page) has also doubled. But the no-op is probably more relevant, since it
>> really does nothing at all except return 1 byte.
>>
>>
>>
>>
>> <https://lh5.googleusercontent.com/-7N_St4j2kN0/ULAXJ7FZudI/AAAAAAAAAFU/yBIF62LKHHU/s1600/Response+Time+Report+website.png>
>>
>>
>>
>>
>>
>> Cheers,
>> Per
>>
>>
>>
>>
>>
>>
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