High usage optimization

[Pierozi]

Regulation of buffer / offset to best performance.
Adjust sleep consumer depending of buffer size.

When we send too many request in short time, we reach error ThrottlingException (200ms on 948599 bytes chunk 1024)

[Pierozi]

https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
Constraint :

The maximum batch size is 1,048,576 bytes, and this size is calculated as the sum of all event messages in UTF-8, plus 26 bytes for each log event.

None of the log events in the batch can be more than 2 hours in the future.

None of the log events in the batch can be older than 14 days or the retention period of the log group.

The log events in the batch must be in chronological ordered by their time stamp. The time stamp is the time the event occurred, expressed as the number of milliseconds after Jan 1, 1970 00:00:00 UTC. (In AWS PowerShell Tools and the AWS SDK for .NET, the timestamp is specified in .NET format: yyyy-mm-ddThh:mm:ss. For example, 2017-09-15T13:45:30.)

The maximum number of log events in a batch is 10,000.

A batch of log events in a single request cannot span more than 24 hours. Otherwise, the operation fails.