Curriculum
Governor Limits are runtime limits enforced by Salesforce to ensure that all customers sharing the Salesforce multi-tenant platform receive fair access to resources. These limits control how much CPU time, memory, database operations, and query execution a transaction can consume.
Because Salesforce serves thousands of organizations on shared infrastructure, Governor Limits prevent any single organization from consuming excessive resources and affecting other customers.
Understanding Governor Limits is one of the most important skills for Salesforce Developers because every Apex Trigger, Apex Class, Flow, and Integration must operate within these limits.
Governor Limits are restrictions imposed by Salesforce on resource consumption.
They help:
Without Governor Limits:
One Organization
↓
Consumes Excessive Resources
↓
Platform Performance DegradesGovernor Limits prevent this scenario.
Salesforce is a:
Multi-Tenant PlatformMultiple organizations share the same infrastructure.
Governor Limits ensure:
These limits are fundamental to Salesforce architecture.
Prevent resource abuse.
Support all organizations.
Encourage efficient coding.
Optimize application design.
Prevent system overload.
These benefits make Governor Limits essential.
Salesforce operates like an apartment building.
Example:
Building
↓
Multiple Apartments
↓
Shared ResourcesEach apartment receives limited resources.
Similarly:
Salesforce
↓
Multiple Organizations
↓
Shared InfrastructureGovernor Limits manage resource allocation.
Salesforce enforces several limit categories.
Developers must understand each category.
Salesforce limits the number of SOQL queries executed in a transaction.
Limit:
100 SOQL Queries
Per Synchronous TransactionExceeding this limit causes an exception.
Poor Practice:
for(Account acc :
accounts){
Contact con =
[
SELECT Id
FROM Contact
LIMIT 1
];
}Result:
Too Many SOQL QueriesThe transaction fails.
Salesforce limits database operations.
Limit:
150 DML Statements
Per TransactionDML Operations Include:
Developers must minimize DML usage.
Poor Practice:
for(Student__c student :
Trigger.new){
insert new
Enrollment__c();
}Result:
Too Many DML StatementsThis violates Governor Limits.
Salesforce limits returned records.
Limit:
50,000 Records
Per TransactionExample:
List<Account> accounts =
[
SELECT Id
FROM Account
];Large datasets may exceed limits.
Developers should filter records carefully.
CPU Time measures processing execution.
Limit:
10 Seconds
Synchronous ApexSalesforce stops execution when the limit is exceeded.
Efficient code reduces CPU usage.
Heap Size represents memory consumed during execution.
Limit:
6 MB
Synchronous ApexMemory stores:
Large collections increase memory usage.
List<Account>
accounts =
new List<Account>();Large data structures may exceed Heap Limits.
A Callout communicates with external systems.
Examples:
Limit:
100 Callouts
Per TransactionDevelopers should optimize integrations.
Future Methods execute asynchronously.
Example:
@future
public static void
processData(){
}Limit:
50 Future Calls
Per TransactionDevelopers must avoid excessive asynchronous processing.
Salesforce restricts email sending.
Example:
Messaging.sendEmail();Limits help prevent spam and resource abuse.
Developers should use email services efficiently.
These errors are common during development.
Bulkification helps prevent:
Example:
Set<Id> accountIds =
new Set<Id>();Collections reduce resource consumption.
Bulkification is the best defense against Governor Limits.
Salesforce provides:
These tools help developers analyze resource usage.
System.debug(
Limits.getQueries()
);Displays used SOQL queries.
Salesforce provides the Limits class.
Useful Methods:
Developers can monitor usage programmatically.
System.debug(
Limits.getDMLStatements()
);Displays current DML usage.
A software training company imports:
20,000 Student RecordsPoor Trigger Design:
Result:
Governor Limit ExceptionBulkified Design:
Result:
Successful ProcessingThe application scales effectively.
These strategies improve performance.
These practices support enterprise development.
Developers should avoid these issues.
Governor Limits are heavily tested in:
Understanding these concepts is critical for exam success.
Organizations rely on Governor Limit knowledge for:
Efficient resource usage ensures system stability.
Understanding Governor Limits helps professionals:
Governor Limits influence every Apex application.
Governor Limits are Salesforce-enforced restrictions that control resource usage in a multi-tenant environment. Through limits on SOQL queries, DML operations, CPU time, heap size, callouts, and asynchronous processing, Salesforce ensures fair and reliable platform performance. Mastering Governor Limits is essential for building scalable, high-performance Salesforce applications and avoiding runtime exceptions.
Governor Limits are Salesforce-enforced resource restrictions that ensure fair platform usage.
Salesforce uses them to manage resources in a multi-tenant environment.
Salesforce allows up to 100 SOQL queries per synchronous transaction.
Salesforce allows up to 150 DML statements per transaction.
By bulkifying code, using collections, and avoiding SOQL or DML inside loops.
They ensure platform stability, scalability, and fair resource allocation.
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