Governor Limits

Question 1

What are “Limits”?

Answer 1

Maximums that are set for different features on the platform and cannot be exceeded

Question 2

What are “Allocations”?

Answer 2

Can be increased because they are the maximums determined by the edition of Salesforce that a customer has purchased

Question 3

What are “Limitations”?

Answer 3

Non-existent characteristics of features and tools, ex. Limitation of the Schema Builder

Question 4

Why use Governor Limits?

Answer 4

• cloud based multi-tenant
  
  • need to prevent one company from using too much resource
• helps us write more efficient code

if exceeded we get an exception that rolls back any changes that would’ve been made

Question 5

What are some limits of SOQL?

Answer 5

• In a single transaction, we can
  
  • execute at most 100 synchronous SOQL queries
  • execute at most 200 asynchronous SOQL queries
  • execute at most 300 synchronous SOQL subqueries
  • return no more than 50,000 records from all queries collectively
• We can avoid these limits by
  
  • using selective queries so that only only the records we want are returned
  • keeping queries out of loops
  • returning lists of records rather than individual records

Question 6

What are some limits of SOSL?

Answer 6

more restrictive than SOQL

• single transaction can only execute 20 SOSL
• each SOSL search returns up to 2,000 record

We can avoid these limits by

• keep out of loop
• return multiple records not individual
• use filter clauses for selective search

Question 7

What are some limits of “DML?

Answer 7

Limits

• 150 DML per transaction
• 10,000 record per operation

Avoid

• avoid loop
• act on list of records not individual
• achieve this via using DML on collection not loop

Question 8

What is the heap size limit?

Answer 8

• a 6 MB synchronous heap or 12 MB asynchronous heap
  
  • we can avoid this by using SOQL for loops

Question 9

CPU limit?

Answer 9

10 seconds of synchronous

or

60 seconds of asynchronous

10 minutes of execution time for a single transaction

Question 10

Execution time limit?

Answer 10

10 minutes for a single transaction

Question 11

What is the difference between the get%() and getLimit%() limit class?

Answer 11

get%() - how much of a governed operation we’ve used

getLimit%() - return limit on that governed operation

Question 11

What is the difference between the get%() and getLimit%() limit class?

Answer 11

get%() - how much of a governed operation we’ve used

getLimit%() - return limit on that governed operation