More questions, this time about SQS, the simple queue service that AWS provides.

  • What was the first AWS service?
  • Are there upper limits on limits on SQS in terms of message/second?
    • FIFO Queues have a limit (300/s), but I wasn’t able to file any hard limits for standard SQS.  In the developer guide they have some examples that reach 2500 messages/second.  I found some benchmarks from 2014, which were able to get to 108k messages/second.
  • Can you create alarms based on the number of messages in a queue?
    • Yes, that is a metric that Cloudwatch tracks: “NumberOfMessagesSent”.  You can use this in combination with an auto scaling group to handle batch processes in a dynamic manner (scale out when you have more work in the queue, scale in when you have less).
  • What is the maximum visibility timeout for SQS?

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