What is the minimum and maximum batch size in Salesforce Batch Apex? - Forcetalks (2024)

FAQs

What is the maximum batch size in batch apex in Salesforce? ›

Batch Apex in Salesforce is designed to efficiently handle large data sets while respecting the platform's governor limits. Key limits include: Total number of records retrieved by SOQL queries: 50 million records. Maximum batch size: Default is 200 records per batch, but can be set up to 2,000.

Limits in Batch Apex

A maximum of 50 million records can be returned in the Database. QueryLocator object. If more than 50 million records are returned, the batch job is immediately terminated and marked as Failed. If the start method returns a QueryLocator, the optional scope parameter of Database.

A custom batch size, from 1 through 2,000, for the platform event Apex trigger. The batch size corresponds to the maximum number of event messages that can be sent to a trigger in one execution. The default batch size is 2,000 for platform event triggers.

The default value for the batch size is 32 which is specified by batch_size=None . We can literally use any integer value between 1 and m for the batch size. But we are limited to using the batch sizes with the power of 2 starting from 16 until 1024.

Note: The default batch size is 200 and the maximum batch size is 2000. We can also specify the batch size at the time of execution. If we don't specify then batch will be executed with the default size. In the developer console, Open the Execute Anonymous window then create the instance and click on Execute.

SOQL Queries: Normal Apex uses 100 records per cycle to execute SOQL queries, whereas Batch Apex does the same with 200 records per cycle.

Once the "Use Bulk API" option is selected in Settings for Data loader. Batch size is set default to 2000. Batch size can be increased upto 10,000 for faster and efficient processing.

The "Too many callouts: 101" error in Apex occurs when you exceed the limit of 100 callouts in a single transaction. This limit is in place to prevent abuse and ensure efficient use of resources.

you need a batch class for data more than 50000. The limit is for one transaction so if you have one query or 100 queries, total record retrieved should be less than 50000.

The max trigger batch size is 200. So in the case of 50k, the trigger would fire 2 times per 200 records meaning 500 invocations of the trigger ( 50,000 / 200 * 2 ). But, you can change the batch size in Data Loader, too, so let's say you use a batch size of 50.

Can a batch apex call another batch apex? ›

Answer: Yes, we can call another batch class from the Finish method.

Yes it is possible, we can call a batch apex from trigger but we should always keep in mind that we should not call batch apex from trigger each time as this will exceeds the governor limit this is because of the reason that we can only have 5 apex jobs queued or executing at a time.

Digging in further, we clearly see an exponential decrease in the test error rate as we move from larger batch sizes to smaller ones. That said, note that for batch size 32, we have the least error rate. We see an exponential increase in the time taken to train as we move from a higher batch size to a lower batch size.

Batch size refers to the number of training instances in the batch. For example, batch_size=128 means that there are 128 training instances in each batch. You should not get confused with batch size and the number of batches!

There is a high correlation between the learning rate and the batch size, when the learning rates are high, the large batch size performs better than with small learning rates. We recommend choosing small batch size with low learning rate.

The "Apex heap size too large" error occurs when too much data is being stored in memory during processing. The limit depends on the type of execution (E.g. synchronous vs asynchronous calls) and current value can be found in the Apex Developer's Guide.

Salesforce bulk API limits

Most applications use Bulk API when there are more than 10,000 records to be read from Salesforce. Each 24-hour period, you are allowed to send up to 15,000 batch submissions.