Apex Heap Management in Salesforce
Summary
Heap size limit errors in Apex often arise not from bad coding but from processing large volumes of real data like thousands of records or large text fields. Salesforce imposes a 6 MB heap limit for synchronous Apex and 12 MB for asynchronous, which can easily be exceeded by reasonable operations. Understanding heap management helps Salesforce developers optimize code and avoid hitting these limits, ensuring smoother operations especially when handling API payloads or bulk records.
Takeaways
- Heap size errors often result from large data volumes, not careless coding.
- Salesforce limits heap size to 6 MB for synchronous and 12 MB for asynchronous Apex.
- Long text fields and large API payloads contribute significantly to heap size usage.
- Optimize Apex code by managing data volume and heap utilization to avoid hitting limits.
- Monitor and handle heap size issues proactively in bulk operations and integrations.
Heap size issues in Apex don’t come from careless coding. They come from perfectly reasonable code running against real data. A few thousand records, a couple of long text fields, or one oversized API payload is enough to push a transaction over the limit. Salesforce allows 6 MB of heap for synchronous Apex and 12 [2335] The post Apex Heap Management in Salesforce appeared first on Apex Hours .