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concurrency can be significantly less than the number of dynos James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

Another nasty consequence being that Heroku’s 30s request time limit, which used to be based on request time alone, is now based on request AND queue time. Which means that a fast request, taking say 2s, could still trigger an “H12” timeout error if it gets caught in a large queue at a dyno.

Which is exactly what happens – in our case, more than than a thousand times an hour.

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added at February 13th, 2013 19:10
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1374185501_dano_profile_for_zdnet

102

11 years

I am in the same boat with you, James. What strikes me hard is that heroku support told us they’ve not seen this with other apps and it is due to our application code, which is not. :(

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doc James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

Dynos and the Dyno Manifold

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added at February 13th, 2013 19:09
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Heroku log format James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

As described on this page

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added at February 13th, 2013 19:08
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elsewhere in their current docs James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

HTTP Routing on Bamboo

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added at February 13th, 2013 19:08
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2013 version James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

See Dynos and the Dyno Manifold

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added at February 13th, 2013 19:08
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page from 2009 James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

From the Wayback Machine!

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added at February 13th, 2013 19:07
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"How it Works" page James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

“intelligent distribution of load instantly as you scale” — sounds bomb; where do I sign?!

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added at February 13th, 2013 19:07
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ab James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

a.k.a. Apache Bench

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added at February 13th, 2013 19:06
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“Something wicked this way comes” James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

Macbeth, Act 4, Scene 1

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added at February 13th, 2013 19:06
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one of Heroku’s largest customers James Somers (Ft. Andrew Warner, ATodd, Chrissyy & Tom Lehman) – Heroku's Ugly Secret

They even wrote a success story about us:

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added at February 13th, 2013 19:05
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