Pagination with a List Controller

You can add pagination to a page using a list controller by utilizing the next and previous actions. For example, if you create a page with the following markup:

<apex:page standardController="Account" recordSetVar="accounts">
   <apex:form >
   <apex:pageBlock title="My Accounts">
   <apex:pageBlockSection >
   <apex:dataList value="{!accounts}" var="a">{!a.name}
    </apex:dataList>
   </apex:pageBlockSection>
   <apex:panelGrid columns="2">
   <apex:commandLink action="{!previous}">Previous</apex:commandLink>
   <apex:commandLink action="{!next}">Next</apex:commandLink>
   
   </apex:panelGrid>
   </apex:pageBlock>
   </apex:form>    
</apex:page>

<apex:dataList>


An ordered or unordered list of values that is defined by iterating over a set of data. The body of the <apex:dataList>component specifies how a single item should appear in the list. The data set can include up to 1,000 items.

By default, a list controller returns 20 records on the page. To control the number of records displayed on each page, use a controller extension to set the pageSize.

Limits in Salesforce

In Trigger and Apex class sales force provide us some limits. Below are the limits.

You can take idea what Salesforce provide us limits.

Limits in Trigger:

1.Number of SOQL queries:  100

2.Number of query rows(records):  50000

3.Number of SOSL queries: 20

4.Number of query rows(records):  2000

5.Number of DML statements: 150

6.Number of DML rows:  10000

7.Maximum CPU time:  10000

8.Maximum heap size: 6000000

9.Number of callouts:  100

10.Number of Email Invocations:  10

11.Number of future calls:  50

12.Number of queueable jobs added to the queue: 50

14.Number of Field one Per Object:  500

15.Number of Relationship Fields:  40

16.Number of Active Workflow on per object:  50

17.Number of Workflow on per objects:  500

18.Number of Approval Process on per object:  500

20.Number of Active Lookup Filters:  5

21.Number of Active Validation Rules:  100

22.Number of VLOOKUP on per object:  10

23.Number of Sharing Rules (Both Owner- and Criteria-based):  300

24.Number of Sharing Rules (Criteria-based Only): 50

Limits In Salesforce:

Feature	Personal Edition	Contact Manager	Group Edition	Professional Edition	Enterprise Edition	Unlimited and Performance Edition	Developer Edition
Action plans: maximum tasks	N/A				75
Active lookup filters	5 per object
Active validation rules per object	N/A	20			100	500	100
Attachments: maximum size in the Notes & Attachments related list1		25 MB for file attachments. 2 GB for feed attachments.
Categories: maximum default categories and hierarchy levels	N/A				100 categories in a data category group 5 levels in a data category group hierarchy
Category groups: maximum default					5 category groups, with 3 groups active at a time
Certificates: maximum					50
Content deliveries: default delivery bandwidth per rolling 24-hour window	20 GB
Content deliveries: default delivery view counts per rolling 24-hour window	20,000
Content deliveries: maximum file size for online viewing	25 MB
Content: maximum file size	2 GB 2 GB (including headers) when uploaded via Chatter REST API 2 GB (including headers) when uploaded via REST API 38 MB when uploaded via SOAP API 10 MB when uploaded via BULK API 10 MB for Google Docs 10 MB when uploaded via Visualforce
Content: maximum libraries	2,000
Content: maximum number of documents	30,000,000
Content: maximum number of documents and versions in a 24–hour period (adjustable)	200,000						2,500
Content packs: maximum files	N/A	50
Custom apps2	N/A	1		255 To exceed this limit, contact Salesforce.	260 To exceed this limit, contact Salesforce.	Unlimited	10
Custom fields per object3	5	25	100		500	800	500
Custom labels	N/A			5,000
Custom links: maximum label length	1,024 characters
Custom links: maximum URL length	3,000 bytes4
Custom objects5	N/A	5	50		200	2,000	400
Custom objects: deletion of parent records in a many-to-many relationship	N/A	Available unless more than 200 junction object records are associated with the deleted parent record and the junction object has a roll-up summary field that rolls up to the other parent.
Custom objects: maximum master-detail relationships		26
Custom permissions	N/A				1,000
Custom profiles: maximum	N/A			2	1,500 per user license type
Custom settings: cached data limit	The lesser of 10 MB or 1 MB multiplied by the number of full-featured user licenses in your org (N/A in Contact Manager and Professional Editions)
Custom settings: maximum fields per setting	5	N/A	100	N/A	300
Divisions: maximum	N/A			100			N/A
Documents: maximum size of custom app logo	20 KB
Documents: maximum size of document to upload	5 MB
Documents: maximum size of file name (with extension)	255 characters
Entitlement processes and milestones	N/A			You can create up to 1,000 entitlement processes total, with up to 10 milestones per process. If your org was created before Summer ’13, its maximum entitlement processes can be lower. Contact Salesforce to increase it.
External objects7	N/A				100
Field history tracking: maximum standard or custom fields tracked for standard or custom objects	N/A	20
File size: maximum in Chatter and on the Files tab	2 GB
Fiscal years: maximum custom	250
Formulas: maximum displayed characters after an evaluation of a formula expression	1,300
Formulas: maximum length	3,900 characters
Formulas: maximum size when compiled	5,000 bytes
Formulas: maximum size when saved	4,000 bytes
Formulas: unique relationships per object	15
Formulas: VLOOKUPfunctions per object	10
Ideas: maximum size of HTML idea comment	N/A			4 KB
Ideas: maximum size of HTML idea description				32 KB
Lightning Apps	N/A			10	25	Unlimited	N/A
Lightning pages: maximum components in a region	25
Master-detail relationship: maximum child records	10,0008
Objects: maximum number of deleting combined objects and child records	100,000
Omni-Channel: maximum pending routing requests9	N/A			30,000
Omni-Channel: maximum queued work items10				5,000 per hour
Opportunity Teams: maximum members	N/A				30
Permission sets: maximum (created)	N/A	1		10	1,000
Permission sets: maximum (created and added as part of an installed managed AppExchange package)	N/A		1,500
Question: maximum characters	N/A				1,000		N/A
Question: maximum characters (with Chatter Answers Optimize Question Flowenabled)					32,000
Quote PDF: maximum logo height	N/A			150 pixels
Quote PDF: maximum logo size				5 MB
Recycle Bin: maximum records	25 times your storage capacity in MBs
Reply: maximum characters	N/A				1,000		N/A
Reply (private): maximum characters (with Chatter Answers Optimize Question Flowenabled)					4,000		N/A
Reply (public): maximum characters (with Chatter Answers Optimize Question Flowenabled)					32,000		N/A
Shared Activities	You can relate up to 50 contacts to nonrecurring tasks, nongroup tasks, and nonrecurring events. You can assign one primary contact. All others are secondary contacts.
Sharing rules	N/A			You can create up to 300 sharing rules per object, including up to 50 criteria-based rules.
Static resources	N/A	A static resource can be up to 5 MB. An org can have up to 250 MB of static resources total.
Tabs2		3	5	1,210 To exceed this limit, contact Salesforce.	1,225 To exceed this limit, contact Salesforce.	1,225 To exceed this limit, contact Salesforce.	100
Tags	A user is limited to a maximum of: 500 unique personal tags 5,000 instances of personal tags applied to records Across all users, your org can have a maximum of: 1,000 unique public tags 50,000 instances of public tags applied to records 5,000,000 instances of personal and public tags applied to records
Territories: maximum account assignment rules	N/A				15
Users: maximum created	1	5	10	Unlimited			2
Users: maximum created (Chatter Free)	N/A	5,000
Visual Workflow	N/A				Each flow can have up to: 50 versions 2,000 steps Each org can have up to: 500 active flows 1,000 flows total 30,000 waiting interviews at a given time 1,000 events processed per hour 20,000 defined relative alarm events across all flows and flow versions
Web-to-Case: maximum new cases generated in a 24–hour period	N/A			5,00011
Web-to-Lead: maximum new leads generated in a 24–hour period				50011