Cloudwatch logs length test

cwl.py

#!/bin/env python3

from time import time, sleep

import boto3

LOG_STREAM = str(int(time()))
LOG_GROUP = "CHANGEME"

cwl = boto3.client("logs")

cwl.create_log_stream(
    logGroupName=LOG_GROUP,
    logStreamName=LOG_STREAM,
)


def log_event(size: int, event_count: int):
    try:
        cwl.put_log_events(
            logGroupName=LOG_GROUP,
            logStreamName=LOG_STREAM,
            logEvents=[
                {
                    "timestamp": int(time()),
                    "message": 'a' * int(size / event_count),
                }
                for i in range(event_count)
            ]
        )
        print(f"Success with size {int(size / event_count)} across {event_count} events")
        return True
    except Exception as e:
        print(f"Failed with size {int(size / event_count)} across {event_count} events: {e}")
        return False


log_event(256 * 1024, 2)

size_sub = 10
while True:
    if not log_event(256 * 1024 - size_sub, 1):
        size_sub += 1
        sleep(1)
        continue
    break

result.txt

Success with size 131072 across 2 events
Failed with size 262134 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262160 bytes exceeds limit of 262144
Failed with size 262133 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262159 bytes exceeds limit of 262144
Failed with size 262132 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262158 bytes exceeds limit of 262144
Failed with size 262131 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262157 bytes exceeds limit of 262144
Failed with size 262130 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262156 bytes exceeds limit of 262144
Failed with size 262129 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262155 bytes exceeds limit of 262144
Failed with size 262128 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262154 bytes exceeds limit of 262144
Failed with size 262127 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262153 bytes exceeds limit of 262144
Failed with size 262126 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262152 bytes exceeds limit of 262144
Failed with size 262125 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262151 bytes exceeds limit of 262144
Failed with size 262124 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262150 bytes exceeds limit of 262144
Failed with size 262123 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262149 bytes exceeds limit of 262144
Failed with size 262122 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262148 bytes exceeds limit of 262144
Failed with size 262121 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262147 bytes exceeds limit of 262144
Failed with size 262120 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262146 bytes exceeds limit of 262144
Failed with size 262119 across 1 events: An error occurred (InvalidParameterException) when calling the PutLogEvents operation: Log event too large: 262145 bytes exceeds limit of 262144
Success with size 262118 across 1 events