How do I schedule an Apex class in Salesforce?

Write a class that implements the Schedulable interface, then either call System.schedule(jobName, cronExpression, new MyClass()) from anonymous Apex, or go to Setup, Apex Classes, Schedule Apex and pick the class, frequency and start time.

Can I schedule Apex every 15 minutes?

Not with one job. A cron expression like 0 0/15 * * * ? fails with Seconds and minutes must be specified as integers. Schedule four hourly jobs instead, at minutes 0, 15, 30 and 45.

How do I stop a scheduled Apex job?

Delete it from Setup, Scheduled Jobs with the Del link, or call System.abortJob() with the CronTrigger Id. You can find the Id by querying CronTrigger by CronJobDetail.Name.

Why can't I deploy changes to my scheduled Apex class?

Salesforce blocks the deploy while the class has jobs waiting, with the error This schedulable class has jobs pending or in progress. Abort the scheduled jobs, deploy, and schedule them again, or allow deployments with pending Apex jobs in Setup, Deployment Settings.

How many scheduled Apex jobs can an org have?

Up to 100 scheduled Apex jobs at the same time. Query CronTrigger before scheduling from code so you don't hit the limit.

Apex Scheduler: Schedule Apex Jobs in Salesforce (Examples)

The Apex Scheduler runs an Apex class automatically at a set time: you write a class that implements the Schedulable interface, then schedule it with System.schedule('Job name', '0 0 7 * * ?', new MyClass()) or from Setup → Apex Classes → Schedule Apex. You stop it with System.abortJob(jobId) or the Del link on the Scheduled Jobs page.

I deployed a real scheduled class to a Salesforce Developer Edition org, scheduled it, triggered the two errors almost everyone hits, aborted it and ran its test class. Below is the code, the real output and the cron expressions you need.

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