Apex Developer Guide

Apex Developer Guide
Release Notes
Getting Started with Apex
Writing Apex
Running Apex
Invoking Apex
Apex Transactions and Governor Limits
Apex Transactions
Execution Governors and Limits
Elastic Limits for Asynchronous Apex Jobs (Beta)
Set Up Governor Limit Email Warnings
Running Apex within Governor Execution Limits
Using Salesforce Features with Apex
Integration and Apex Utilities
Debugging, Testing, and Deploying Apex
Apex Reference
Appendices
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Apex Transactions and Governor Limits

Apex Transactions ensure the integrity of data. Apex code runs as part of atomic transactions. Governor execution limits ensure the efficient use of resources on the Lightning Platform multitenant platform.

Most of the governor limits are per transaction, and some aren’t, such as 24-hour limits.

To make sure Apex adheres to governor limits, certain design patterns should be used, such as bulk calls and foreign key relationships in queries.