6. Sizing : 2. Choose an Instance Size
 
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2. Choose an Instance Size
Select an instance size based on the instance type you chose in step 1. Take into account:
• Number of users
• Complexity of queries
• Size of the database (2 cores per simultaneous query for simple reports and development workloads, 4–8 cores per query for average workloads, and up to 32 cores per query for complex query workloads).
Size
Economy
Economy Sport
Enterprise
Enterprise Capacity
Enterprise Sport
Small
(2–5 active users*)
M4.2xlarge
• 4 cores
• 32 GB RAM
• EBS
R4.2xlarge
• 4 cores
• 61 GB
• EBS
 
 
 
Medium
(4–10 users)
M4.4xlarge
• 8 cores
• 64 GB
• EBS
R4.4xlarge
• 8 cores
• 122 GB
• EBS
H1.4xlarge
• 8 cores
• 64 GB
• 2x2000 HDD
D2.4xlarge
• 8 cores
• 122 GB
• 12x2000 HD
 
Large
(8–20 users)
 
R4.8xlarge
• 16 cores
• 244 GB
• EBS
H1.8xlarge
• 16 cores
• 128 GB
• 4x2000 HDD
D2.8xlarge
• 18 cores
• 244 GB
• 24x2000 HD
 
I3.8xlarge
• 16 cores
• 244 GB
• 4x1900 SSD
XLarge
(16–40 users)
M4.10xlarge
• 20 cores
• 160 GB
• EBS
R4.16xlarge
• 32 cores
• 488 GB
• EBS
H1.16xlarge
• 32 cores
• 256 GB
• 8x2000 HDD
I3.16xlarge
• 32 cores
• 488 GB
• 8x1900 SSD
X1.16xlarge
• 32 cores
• 976 GB
• 1x1920 SSD
XXLarge
(32–80 users)
M4.16xlarge
• 32 cores
• 256 GB
• EBS
 
 
 
X1.32xlarge
• 64 cores
• 1952 GB
• 2x1920 SSD
* The definition of users can vary widely, but the range here is intended to indicate connected users actively submitting queries against the database.
Examples:
Users and Needs
Configuration
Instance Type
• 4 users
• Basic queries
• 1 TB database
• Cost sensitive
• General purpose
• 8 cores
• EBS storage
• Small Economy
• M4.4xlarge instance
• 12 users
• Ad hoc queries
• Performance sensitive
• 5 TB database
• Always available
• 16 cores
• Local HDD storage
• Large Enterprise
• H1.8xlarge instance
• 20 users
• Mixed queries
• Performance sensitive
• 10 TB database
• Always available
• Large local HDD storage
• 18 cores
• Large Enterprise
• D2.8xlarge instance
• 40 users
• Complex queries
• Maximum performance
• 10 TB database
• 24x7 availability
• Fast storage
• 64 cores
• Big memory
• XXL Enterprise Sport
• X1.32xlarge instance