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Cron Expression: * * * * * *

Every second (only valid in 6-field cron flavors like Quartz / Spring / AWS EventBridge with seconds enabled).

Field Breakdown

FieldValue
Second*
Minute*
Hour*
Day of Month*
Month*
Day of Week*

Common Use Case

High-frequency polling - usually a sign you should use a queue or stream instead.

Equivalents in Popular Schedulers

crontab (Linux/macOS)

* * * * * * /path/to/your/script.sh

GitHub Actions (.github/workflows/*.yml)

on:
  schedule:
    - cron: '* * * * * *'

AWS EventBridge (cron format)

cron(* * * * * *)    # Note: AWS uses 6 fields with year

Kubernetes CronJob

spec:
  schedule: "* * * * * *"

Other Common Cron Expressions

* * * * **/5 * * * **/10 * * * **/15 * * * **/30 * * * *0 * * * *
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