"Channel API Hours Used" quota exceeded

[PK]

For the first time ever today I get this message, in the console.

The API channel.create_channel fails with an exception as a consequence.

Has anybody experienced it? Is signing up for a support program the only way to have it increased?

Thanks,
PK

p...@gae123.com

[Jesse Scherer (Google Cloud Support)]

Hi PK,

The "Channel API Hours Used" quota has to with the TTL (time to live) of the channels you are opening. In Python, this is the "duration_minutes" variable, and it defaults to two hours: https://cloud.google.com/appengine/docs/python/channel/functions.

Note that enabling billing for your app increases the limit 15X to 180 channel hours per minute. This would mean that every minute, you could open one channel with a TTL of 180 hours, ten channels with a TTL of 18 hours, 1800 channels with 6 minute TTLs, and so on.

Beyond making sure that billing is enabled for your app, the best advice is to check that the TTL you are using makes sense. Again, this quota cares about how long of a TTL you ask for when you create the channel, not how long the channels eventually last. So, if in production you notice that channels only last a few minutes, lowering your TTL from the 2 hour default to 30 minutes would help a lot.

Regards, and let us know if you're still running into problems.

[PK]

Thanks Jesse, I tuned my code and we will see how it goes. There seems to be an issue with some customers who keep failing to communicate over a channel and keep asking for a new channel. Other customers are fine. I still need to get to the bottom of this. Is the channel communication over ports that could be blocked by a firewall?

I think the other issue here is that we need alerts when quotas reach certain thresholds because I completely missed this. The Dashboard does not show this particular quota which made things worse. Any recommendations on this would be appreciated.

Best,

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PK

p...@gae123.com

[PK]

It looks like I am hit by this: https://code.google.com/p/googleappengine/issues/detail?id=4764

A 5 years old known issue, 61 people have starred it, a very reasonable request, still comes and bites us.

PK

p...@gae123.com