Salesforce Governor Limits

Governor execution limits ensure the efficient use of resources on the Force.com multitenant platform. It is the limit specified by the Salesforce.com on code execution for efficient processing.

Why Salesforce has Governor Limits?

Because Apex runs in a multitenant environment, the Apex runtime engine strictly enforces limits to ensure that runaway Apex code or processes don’t monopolize shared resources. If some Apex code exceeds a limit, the associated governor issues a runtime exception that cannot be handled.

Type of Governor Limits

• Per-Transaction Apex Limits
• Per-Transaction Certified Managed Package Limits
• Lightning Platform Apex Limits
• Static Apex Limits
• Size-Specific Apex Limits
• Miscellaneous Apex Limit

Here is list of important governor limits in salesforce

• Total number of SOQL queries issued : 200
• Total number of SOSL queries issued : 20
• Total number of DML statements issued : 150
• Total number of records retrieved by SOQL queries : 50,000
• Total number of records processed as a result of DML statements : 10,000

Here is full list of governor limits in salesforce

Description	Synchronous Limit	Asynchronous Limit
Total number of SOQL queries issued	100	200
Total number of records retrieved by SOQL queries	50,000
Total number of records retrieved by Database.getQueryLocator	10,000
Total number of SOSL queries issued	20
Total number of records retrieved by a single SOSL query	2,000
Total number of DML statements issued	150
Total number of records processed as a result of DML statements, Approval.process, or database.emptyRecycleBin	10,000
Total stack depth for any Apex invocation that recursively fires triggers due to insert, update, or delete statements	16
Total number of callouts (HTTP requests or Web services calls) in a transaction	100
Maximum cumulative timeout for all callouts (HTTP requests or Web services calls) in a transaction	120 seconds
Maximum number of methods with the future annotation allowed per Apex invocation	50
Maximum number of Apex jobs added to the queue with System.enqueueJob	50
Total number of sendEmail methods allowed	10
Total heap size	6 MB	12 MB
Maximum CPU time on the Salesforce servers	10,000 milliseconds	60,000 milliseconds
Maximum execution time for each Apex transaction	10 minutes
Maximum number of push notification method calls allowed per Apex transaction	10
Maximum number of push notifications that can be sent in each push notification method call	2,000

 Avoiding Governor limits

From a Developer’s perspective, it is important to ensure that our code should be scalable and should not hit the governor limits. Its very important to follow some of best practices so that our code does not hit governor limit.