Salesforce Governor Limits

 
Since Apex runs in a multitenant environment, the Apex run time engine strictly enforces a number of limits to ensure that runaway Apex does not monopolize shared resources. These limits, or governors, track and enforce the statistics outlined in the following table. If some Apex code ever exceeds a limit, the associated governor issues a run time exception that cannot be handled.

Description	Limit
Total number of SOQL queries issued	100
Total number of SOQL queries issued for Batch Apex and future methods	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	200
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 number of executed code statements	200,000
Total number of executed code statements for Batch Apex and future methods	1,000,000
Total heap size	6 MB
Total heap size for Batch Apex and future methods	12 MB
Total stack depth for any Apex invocation that recursively fires triggers due toinsert, update, or delete statements	16
For loop list batch size	200
Total number of callouts (HTTP requests or Web services calls) in a request	10
Maximum timeout for all callouts (HTTP requests or Web services calls) in a request	120 seconds
Default timeout of callouts (HTTP requests or Web services calls) in a request	10 seconds
Total number of methods with the future annotation allowed per Apex invocation	10
Maximum size of callout request or response (HTTP request or Web services call)	3 MB
Total number of sendEmail methods allowed	10
Total number of describes allowed	100
Total number of classes that can be scheduled concurrently	25
Total number of test classes that can be queued per a 24–hour period	The greater of 500 or 10 multiplied by the number of test classes in the organization

Visualforce Limits

Available in: Contact Manager, Group, Professional, Enterprise,Performance, Unlimited, and Developer Editions

Limit	Value
Maximum response size for a Visualforce page	Less than 15 MB
Maximum view state size in a Visualforce page	135KB
Maximum size of a Visualforce email template	1 MB
Maximum file size for a file uploaded using a Visualforcepage	10 MB
Maximum size of HTML response before rendering, whenVisualforce page is rendered as PDF	Less than 15 MB
Maximum PDF file size for a Visualforce page rendered as a PDF	60 MB
Maximum total size of all images included in a Visualforcepage rendered as a PDF	30 MB
Maximum response size of a JavaScript remote call	15 MB
Default timeout for a JavaScript remoting call	30000milliseconds (30seconds)
Maximum timeout for a JavaScript remoting call	120000milliseconds (120seconds)
Maximum number of rows retrieved by queries for a singleVisualforce page request	50,000
Maximum number of rows retrieved by queries for a singleVisualforce page request in read-only mode	1 million
Maximum number of collection items that can be iterated in an iteration component such as <apex:pageBlockTable> and<apex:repeat>	1,000
Maximum number of collection items that can be iterated in an iteration component such as <apex:pageBlockTable> and<apex:repeat> in read-only mode	10,000
Maximum number of field sets that can be displayed on a single Visualforce page.	50
Maximum number of records that can be handled by StandardSetController	10,000

SOQL and SOSL Limits

Feature	Limit	Limit Description
SOQL statements	Maximum length of SOQL statements	By default, SOQL statements cannot exceed 20,000 characters in length.
SOSL statements	Maximum length of SOSL statements	The SOSL statement character limit is tied to the SOQL statement character limit defined for your organization. By default, SOQL and SOSL queries cannot exceed 20,000 characters.
SOSL search query strings	Maximum length ofSearchQuerystring	If the SearchQuery string is longer than 10,000 characters, no result rows are returned. If SearchQuery is longer than 4,000 characters, any logical operators are removed. For example, the ANDoperator in a statement with aSearchQuery that’s 4,001 characters will default to the OR operator, which could return more results than expected.
SOSL query results	Maximum number of rows returned	2,000 results total (API version 28.0 and later), unless you specify custom limits in the query. Previous API versions return 200 results.
Relationship queries	Relationship query limits	·         No more than 35 child-to-parent relationships can be specified in a query. A custom object allows up to 25 relationships, so you can reference all the child-to-parent relationships for a custom object in one query. ·         No more than 20 parent-to-child relationships can be specified in a query. ·         In each specified relationship, no more than five levels can be specified in a child-to-parent relationship. For example,Contact.Account.Owner.FirstName(three levels). ·         In each specified relationship, only one level of parent-to-child relationship can be specified in a query. For example, if the FROM clause specifies Account, the SELECT clause can specify only the Contact or other objects at that level. It could not specify a child object of Contact.
FOR VIEW and FOR REFERENCE	MaximumRecentlyViewedrecords allowed	The RecentlyViewed object is updated every time the logged-in user views or references a record. It is also updated when records are retrieved using the FOR VIEW or FOR REFERENCE clause in a SOQL query. To ensure that the most recent data is available, RecentlyViewed data is periodically truncated down to 200 records per object.
OFFSET clause	Maximum number of rows skipped by OFFSET	·he maximum offset is 2,000 rows. Requesting an offset greater than 2,000 will result in aNUMBER_OUTSIDE_VALID_RANGE error.
ORDER BY clause in SOQL statement	ORDER BY fields limit	32 fields

Metadata Limits

The following are limits for deploying and retrieving metadata. These limits apply to the Force.com IDE, the Force.com Migration Tool, and the Metadata API.

Metadata Limit	Limit Description
Retrieving and deploying metadata	Metadata API can deploy and retrieve up to 5,000 filesor 400 MB at one time. While a specific file size limit is not enforced, you might encounter out-of-memory errors for very large files.
Change sets	Inbound and outbound change sets can have up to5,000 files of metadata.

API Name	What It’s For	When to Use It	Protocol	Data Format	Communication
REST API	Accessing objects in your organization using REST.	You want to leverage the REST architecture to integrate with your organization. No WSDL requirement.Well-suited for browser-based applications, mobile apps, and highly-interactive social applications.	REST	JSON, XML	Synchronous
SOAP API	Integrating your organization’s data with other applications using SOAP.	You have pre-existing middleware services that need to work with WSDLs and XML data.	SOAP/WSDL	XML	Synchronous
Chatter REST API	Accessing Chatter feeds and social data such as users, groups, followers, and files using REST.	You want to integrateChatter into a variety of applications, such as mobile apps, intranet sites, and third-party Web applications.	REST	JSON,   XML	Synchronous (photos are processed asynchronously)
Bulk API	Loading or deleting large numbers of records.	You have over a million records to process and speed is a requirement.	REST	csv,xml	Asynchronous
Metadata API	Managing customizations in your organization and building tools that can manage the metadata model, not the data itself.	You want to migrate changes, such as custom object definitions and page layouts, from a sandbox to your production environment.	SOAP/WSDL	XML	Asynchronous
Streaming API	Providing a stream of data reflecting data changes in your organization.	You need near real-time notifications of when records are created or updated.	Bayeux	JSON	Asynchronous (stream of data)
Apex REST API	Building your own REST API in Apex. ExposesApex classes as RESTful Web services.	You need to build custom JSON responses or you want to expose custom functionality that you implemented in Apex.	REST	JSON, XML, Custom	Synchronous
Apex SOAP API	Creating custom SOAP Web services in Apex. Exposes Apex classes as SOAP Web services.	You need to build custom XML responses or you want to expose custom functionality that you implemented in Apex .	SOAP/WSDL	XML	Synchronous
Tooling API	Building custom development tools forForce.com applications	You want to add functionality to your existing development and integration tools or you want to build specialized development tools for a specific application or service.	REST and SOAP	JSON, XML, Custom	Asynchronous