Huge cold start times, up to 75 seconds!

Spines

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Mar 3, 2011, 12:34:15 PM3/3/11

to Google App Engine

For the past couple days, I've been experiencing huge cold start
times. They range from 10 seconds, all the way up to 75 seconds. On
average they seem to be about 30 seconds.

Just a couple weeks ago my cold start times ranged from 7 to 15
seconds. To make sure it wasn't due to any changes in my code, I
tested out an older version of my code too. It was also experiencing
large cold start times.

Spines

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Mar 3, 2011, 12:43:57 PM3/3/11

to Google App Engine

More info:

My cpu_ms for cold starts is consistently between 7 and 9 seconds, yet
the actual time it takes to respond fluctuates from 8 to 75 seconds.

Log lines:
2011-03-03 09:36:26.620 /?tab=recentedits&ajax=true 200 47085ms
8873cpu_ms 30api_cpu_ms
2011-03-03 09:25:38.135 /?tab=popular&ajax=true 200 39145ms 8640cpu_ms
30api_cpu_ms
2011-03-03 07:38:15.167 /?tab=needshelp&ajax=true 200 17632ms
8476cpu_ms 30api_cpu_ms
2011-03-03 07:18:03.143 /?tab=new&ajax=true 200 75680ms 8896cpu_ms
30api_cpu_ms

Petey

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Mar 3, 2011, 7:29:53 PM3/3/11

to Google App Engine

I'm seeing the same thing in the last couple of days. Requests that
normally take under a second are taking longer than 15 seconds.

An example from my logs:

2011-03-03 16:25:01.114 "GET /friends" 200 real=22788ms cpu=52549ms
api=260ms overhead=0ms (5 RPCs)

And it's only running 3 Gets and 2 Queries.

Gary Eberhart

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Mar 3, 2011, 9:01:22 PM3/3/11

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I had the same issues. However, paying the .30 cents per day to keep 3 instances of my app running has made a huge difference.

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Robert Kluin

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Mar 3, 2011, 10:47:53 PM3/3/11

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I see occasional issues with this too. Here a a few samples from
about 12 hours ago, same URL:

My typical loading request:
ms=228 cpu_ms=222 api_cpu_ms=82 cpm_usd=0.006245 loading_request=1

I see these maybe 15% of the time:
ms=6667 cpu_ms=358 api_cpu_ms=8 cpm_usd=0.010137 loading_request=1

And these maybe 5% to 10%, depending on the day:
ms=421495 cpu_ms=380 api_cpu_ms=77 cpm_usd=0.010744
loading_request=1 pending_ms=14

I've also went through a period of a couple weeks where this app was
seeing about 95% of the loading requests like the last one. Same code
base (last update to it was about 110 days ago).

Robert

Simon Knott

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Mar 4, 2011, 4:38:03 AM3/4/11

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I've experienced this today as well:

2011-03-04 00:20:13.826 /daySummary/get 200 33245ms 6798cpu_ms 12api_cpu_ms

Mauro Asprea

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Mar 4, 2011, 5:10:14 AM3/4/11

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this is happening to me too. Today seems to be more responsive than yesterday (6-12 secs)

On Fri, Mar 4, 2011 at 10:38 AM, Simon Knott <knott...@gmail.com> wrote:

I've experienced this today as well:
2011-03-04 00:20:13.826 /daySummary/get 200 33245ms 6798cpu_ms 12api_cpu_ms

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