Cron Expression */3 * * * * Meaning (2026)
Cron expression */3 * * * * means Every 3 minutes.
Cron expression */3 * * * * means run every 3 minutes. Use this 2026 guide to validate interval behavior, avoid overlap risk, and deploy safely.
Cron Expression
Common use cases
- High-frequency polling without every-minute load
- Short-interval queue processing and retries
- Frequent metrics collection pipelines
- Near-real-time cache refresh jobs
How to use this cron schedule
Cron expression `*/3 * * * *` means run once every three minutes. The `*/3` step in the minute field selects minutes 0, 3, 6, 9, and so on through each hour. If your query is cron expression */3 * * * * meaning, this is the exact execution pattern. In 2026, three-minute cadence is a practical compromise for near-real-time tasks that do not justify every-minute compute cost. It is common for API polling, lightweight queue checks, and frequent dashboard refresh pipelines.
The main production risk with short intervals is overlap. If a run takes longer than three minutes, the next trigger can start before the previous execution finishes. Use idempotent writes, queue consumers, or locking to prevent duplicate side effects. Keep each run narrow in scope and push heavy logic to asynchronous workers when needed. Also validate external API rate limits, because high-frequency schedules can unintentionally exceed vendor quotas and create intermittent failure patterns that are hard to diagnose.
For stable 2026 operations, pair this expression with strong observability from day one. Track run duration, error rate, and processed item counts so drift is visible early. Add alerts for consecutive failures and for jobs that exceed expected runtime. If load grows, you can move non-critical work to every 5 or 10 minutes while keeping only latency-sensitive tasks on three-minute cadence. That tuning approach preserves responsiveness and keeps infrastructure costs predictable.
Want to customize this schedule?
Open it in the visual builder to tweak the expression interactively.
Open in BuilderNeed to monitor this cron job?
Cronhub tracks your scheduled jobs and alerts you if they fail or run late.
Platform usage examples
# Edit your crontab
crontab -e
# Add this line to run expression */3 * * * * meaning (2026)
*/3 * * * * /usr/bin/php /var/www/html/script.php
# Or run a shell script
*/3 * * * * /home/user/scripts/job.sh >> /var/log/job.log 2>&1# .github/workflows/scheduled.yml
name: Scheduled Job
on:
schedule:
- cron: '*/3 * * * *'
jobs:
run:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: Run job
run: echo "Running expression */3 * * * * meaning (2026)"apiVersion: batch/v1
kind: CronJob
metadata:
name: my-scheduled-job
spec:
schedule: "*/3 * * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: job
image: my-image:latest
restartPolicy: OnFailureRelated developer tools
More free tools for engineering workflows that pair with scheduled jobs:
Frequently asked questions
What is the cron expression for expression */3 * * * * meaning (2026)?
The cron expression is */3 * * * *. Cron expression */3 * * * * means run every 3 minutes. Use this 2026 guide to validate interval behavior, avoid overlap risk, and deploy safely.
How do I schedule a cron job to run expression */3 * * * * meaning (2026) in Linux?
Open your crontab with "crontab -e" and add a new line: */3 * * * * /path/to/your/script.sh — this schedules your script to run expression */3 * * * * meaning (2026). Save and exit; the cron daemon picks up the change immediately.
What does the cron expression "*/3 * * * *" mean?
Cron expression */3 * * * * means run every 3 minutes. Use this 2026 guide to validate interval behavior, avoid overlap risk, and deploy safely.
Can I use "*/3 * * * *" in GitHub Actions?
Yes. In your workflow YAML, set the schedule trigger: on: schedule: - cron: '*/3 * * * *'. GitHub Actions uses standard 5-field Unix cron syntax, so this expression works as-is.