logSampling.ts

import { Logger } from '@aws-lambda-powertools/logger';

// Notice the log level set to 'ERROR'
const logger = new Logger({
    logLevel: 'ERROR',
    sampleRateValue: 0.5
});

export const handler = async (_event: any, _context: any): Promise<void> => {

    // This log item (equal to log level 'ERROR') will be printed to standard output
    // in all Lambda invocations
    logger.error('This is an ERROR log');

    // These log items (below the log level 'ERROR') have ~50% chance 
    // of being printed in a Lambda invocation
    logger.debug('This is a DEBUG log that has 50% chance of being printed');
    logger.info('This is an INFO log that has 50% chance of being printed');
    logger.warn('This is a WARN log that has 50% chance of being printed');
    
    // Optional: refresh sample rate calculation on runtime
    // logger.refreshSampleRateCalculation();

};