What is cron interval?

The Cron time string format consists of five fields that Cron converts into a time interval. Cron then uses this interval to determine how often to run an associated command on your Drupal site. For example, a Cron time string of 0 10 15 * * executes a command on the 15th of each month at 10:00 A.M. UTC.

Is it bad to run a cron job every minute?

You can’t run cron jobs more frequently than once a minute so this isn’t possible from a cron anyways. You’d have to have a process running in a loop with sleep to achieve this, but the idea is overkill anyways – once a minute is fine.

How do you set a cron job in seconds?

Cron job cannot be used to schedule a job in seconds interval. i.e You cannot schedule a cron job to run every 5 seconds. The alternative is to write a shell script that uses ‘sleep 5’ command in it. Create a shell script every-5-seconds.sh using bash while loop as shown below.

How do I make a cron job run every 5 minutes?

Run a program or script every 5 or X minutes or hours

1. Edit your cronjob file by running crontab -e command.
2. Add the following line for an every-5-minutes interval. */5 * * * * /path/to/script-or-program.
3. Save the file, and that is it.

How long can a cron job run?

We limit cron jobs to running no more often than every 5 minutes, which means a task that needs to be done “now, but not in the web request” may happen as long as 5 minutes later. A running cron task blocks a new code deploy.

How frequently can you run a cron job?

Unfortunately cronjobs can run only at a maximum of once per minute. So in the worst-case a user has to wait one minute until his Email is really going to be sent.

How often can you run a cron job?

What does “cron job every 1 minute” mean?

“At every minute.” Cron job every 1 minute is a commonly used cron schedule.

What is a good Cron schedule to set up?

Cron job every 1 minute is a commonly used cron schedule.

Is Cron the wrong tool for You?

If your task needs to run that frequently, cron is the wrong tool. Aside from the fact that it simply won’t launch jobs that frequently, you also risk some serious problems if the job takes longer to run than the interval between launches.

Is it possible to wake up a cron instance at night?

Cron is designed to wake up at every minute, so it is not possible to do it without some hacking, for example sleep like you mentioned. Don’t forget to write something into your program so that it exits if a previous instance is already running.