This report was generated on 13 March 2024.
NOTE
All EC2 instances offered by AWS haven't been included.
Only the instances supported by Databricks have been included.
Key takeaway - Average ram to core ratio, by family
| instance type | average ram per vcpu (gb) |
|---|---|
| m-general purpose | 4.000000 |
| c-compute optimized | 2.032738 |
| r-memory optimized | 7.972345 |
| z1d-memory optimized | 8.000000 |
| d-storage optimized | 5.600000 |
| i-storage optimized | 7.848958 |
Introduction
When deciding an instance type for your workloads, you simply need to know how much ram you have got for every processor core. This decides the extent of parallelism - how many cores can you actively use, while staying within limits of available ram.
Eg - Suppose your instance has 8cpu and 64gb ram. The max ram per core available is 8gb. Now, suppose your workload is designed to use 10gb for every core. In this case, you can only run it on 6 cores. 2 cores will be idle. This is the limit of your parallelism.
Ram to core ratio is the golden metric.
When you look at the families of AWS EC2 instances, every family tries to maintain the same ram to core ratio across in its instances. The number of cores increases as you go up, but the ram per core ratio stays the same.
So, if you know the kind of workloads you have, you know the family of EC2 instances you need.
I didn't find these numbers online, so I'm publishing my report here. Enjoy.
Notes on Multi-threading, and its relation with processor families
Multi-Threading explanation:
On most modern CPUs, a single physical core can run multiple threads by rapidly switching between them. This technology of running multiple threads on one physical core is called Multi-threading. (Intel calls it Hyperthreading, which is simply a mix of tech and marketing).
Suppose your CPU has only 1 physical core, but it supports multi-threading and can run 2 threads per core. So, to the operating system, it will appear as if you have 2 CPU cores. Even when there is only one physical core.
These 2 multi-threaded CPU cores are called as vCPU (virtual CPU).
The operating system only reports vCPU. It doesn't report the number of physical cores.
Relevance to Databricks:
In case of Databricks, the spark engine is running on top of the OS. So it gets the number of available cores from the operating system itself - the number of vCPU. In the above example, Databricks will be told that there are 2 cores available.
In our calculation of ram per core, what matters is the number of vCPU as seen by the operating system. The actual number of physical cores don't really matter.
So, in the calculations, I have only considered the number of virtual processors (vCPU), and not the actual number of physical cores.
- All AWS EC2 instances with Intel or AMD processors support multi-threading and run 2 threads per core.
- All Graviton processors run 1 thread per core.
PROCESSOR FAMILIES
You'll see variants in EC2 instances within the same EC2 instance family. These variations are because of the processors used within the instance.
For example, instances with i in name have intel processors, a in name have AMD processors, g in name have Graviton processors.
Performance varies across processor families. Still, what matters the most is the amount of ram available per core. The ram to core ratio is still the golden metric.
Details of all EC2 instance families
This graph was created from the data tables below. It is actually a very large, wide graph. Open the image to enlarge it.
General purpose instances
M-general purpose
Every instance of this family has 4gb ram for every core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| m-general purpose | m4.large | 2 | 8 | 4 |
| m-general purpose | m4.xlarge | 4 | 16 | 4 |
| m-general purpose | m4.2xlarge | 8 | 32 | 4 |
| m-general purpose | m4.4xlarge | 16 | 64 | 4 |
| m-general purpose | m4.10xlarge | 40 | 160 | 4 |
| m-general purpose | m4.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5.large | 2 | 8 | 4 |
| m-general purpose | m5.xlarge | 4 | 16 | 4 |
| m-general purpose | m5.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5.4xlarge | 16 | 64 | 4 |
| m-general purpose | m5.8xlarge | 32 | 128 | 4 |
| m-general purpose | m5.12xlarge | 48 | 192 | 4 |
| m-general purpose | m5.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5.24xlarge | 96 | 384 | 4 |
| m-general purpose | m5a.large | 2 | 8 | 4 |
| m-general purpose | m5a.xlarge | 4 | 16 | 4 |
| m-general purpose | m5a.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5a.4xlarge | 16 | 64 | 4 |
| m-general purpose | m5a.8xlarge | 32 | 128 | 4 |
| m-general purpose | m5a.12xlarge | 48 | 192 | 4 |
| m-general purpose | m5a.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5a.24xlarge | 96 | 384 | 4 |
| m-general purpose | m5d.large | 2 | 8 | 4 |
| m-general purpose | m5d.xlarge | 4 | 16 | 4 |
| m-general purpose | m5d.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5d.4xlarge | 16 | 64 | 4 |
| m-general purpose | m5d.8xlarge | 32 | 128 | 4 |
| m-general purpose | m5d.12xlarge | 48 | 192 | 4 |
| m-general purpose | m5d.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5d.24xlarge | 96 | 384 | 4 |
| m-general purpose | m5dn.large | 2 | 8 | 4 |
| m-general purpose | m5dn.xlarge | 4 | 16 | 4 |
| m-general purpose | m5dn.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5dn.4xlarge | 16 | 64 | 4 |
| m-general purpose | m5dn.8xlarge | 32 | 128 | 4 |
| m-general purpose | m5dn.12xlarge | 48 | 192 | 4 |
| m-general purpose | m5dn.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5dn.24xlarge | 96 | 384 | 4 |
| m-general purpose | m5n.large | 2 | 8 | 4 |
| m-general purpose | m5n.xlarge | 4 | 16 | 4 |
| m-general purpose | m5n.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5n.4xlarge | 16 | 64 | 4 |
| m-general purpose | m5n.8xlarge | 32 | 128 | 4 |
| m-general purpose | m5n.12xlarge | 48 | 192 | 4 |
| m-general purpose | m5n.16xlarge | 64 | 256 | 4 |
| m-general purpose | m5n.24xlarge | 96 | 384 | 4 |
| m-general purpose | m5zn.large | 2 | 8 | 4 |
| m-general purpose | m5zn.xlarge | 4 | 16 | 4 |
| m-general purpose | m5zn.2xlarge | 8 | 32 | 4 |
| m-general purpose | m5zn.3xlarge | 12 | 48 | 4 |
| m-general purpose | m5zn.6xlarge | 24 | 96 | 4 |
| m-general purpose | m5zn.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6g.large | 2 | 8 | 4 |
| m-general purpose | m6g.xlarge | 4 | 16 | 4 |
| m-general purpose | m6g.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6g.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6g.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6g.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6g.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6gd.large | 2 | 8 | 4 |
| m-general purpose | m6gd.xlarge | 4 | 16 | 4 |
| m-general purpose | m6gd.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6gd.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6gd.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6gd.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6gd.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6i.large | 2 | 8 | 4 |
| m-general purpose | m6i.xlarge | 4 | 16 | 4 |
| m-general purpose | m6i.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6i.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6i.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6i.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6i.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6i.24xlarge | 96 | 384 | 4 |
| m-general purpose | m6i.32xlarge | 128 | 512 | 4 |
| m-general purpose | m6id.large | 2 | 8 | 4 |
| m-general purpose | m6id.xlarge | 4 | 16 | 4 |
| m-general purpose | m6id.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6id.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6id.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6id.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6id.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6id.24xlarge | 96 | 384 | 4 |
| m-general purpose | m6id.32xlarge | 128 | 512 | 4 |
| m-general purpose | m6idn.large | 2 | 8 | 4 |
| m-general purpose | m6idn.xlarge | 4 | 16 | 4 |
| m-general purpose | m6idn.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6idn.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6idn.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6idn.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6idn.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6idn.24xlarge | 96 | 384 | 4 |
| m-general purpose | m6idn.32xlarge | 128 | 512 | 4 |
| m-general purpose | m6in.large | 2 | 8 | 4 |
| m-general purpose | m6in.xlarge | 4 | 16 | 4 |
| m-general purpose | m6in.2xlarge | 8 | 32 | 4 |
| m-general purpose | m6in.4xlarge | 16 | 64 | 4 |
| m-general purpose | m6in.8xlarge | 32 | 128 | 4 |
| m-general purpose | m6in.12xlarge | 48 | 192 | 4 |
| m-general purpose | m6in.16xlarge | 64 | 256 | 4 |
| m-general purpose | m6in.24xlarge | 96 | 384 | 4 |
| m-general purpose | m6in.32xlarge | 128 | 512 | 4 |
| m-general purpose | m7g.large | 2 | 8 | 4 |
| m-general purpose | m7g.xlarge | 4 | 16 | 4 |
| m-general purpose | m7g.2xlarge | 8 | 32 | 4 |
| m-general purpose | m7g.4xlarge | 16 | 64 | 4 |
| m-general purpose | m7g.8xlarge | 32 | 128 | 4 |
| m-general purpose | m7g.12xlarge | 48 | 192 | 4 |
| m-general purpose | m7g.16xlarge | 64 | 256 | 4 |
| m-general purpose | m7gd.large | 2 | 8 | 4 |
| m-general purpose | m7gd.xlarge | 4 | 16 | 4 |
| m-general purpose | m7gd.2xlarge | 8 | 32 | 4 |
| m-general purpose | m7gd.4xlarge | 16 | 64 | 4 |
| m-general purpose | m7gd.8xlarge | 32 | 128 | 4 |
| m-general purpose | m7gd.12xlarge | 48 | 192 | 4 |
| m-general purpose | m7gd.16xlarge | 64 | 256 | 4 |
Compute optimized instances
C-compute optimized
With the exception of a few instances, all instances of this family have 2gb ram per core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| c-compute optimized | c4.2xlarge | 8 | 15 | 1.875 |
| c-compute optimized | c4.4xlarge | 16 | 30 | 1.875 |
| c-compute optimized | c4.8xlarge | 36 | 60 | 1.666666667 |
| c-compute optimized | c5.xlarge | 4 | 8 | 2 |
| c-compute optimized | c5.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c5.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c5.9xlarge | 36 | 72 | 2 |
| c-compute optimized | c5.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c5.18xlarge | 72 | 144 | 2 |
| c-compute optimized | c5.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c5a.xlarge | 4 | 8 | 2 |
| c-compute optimized | c5a.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c5a.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c5a.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c5a.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c5a.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c5a.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c5ad.xlarge | 4 | 8 | 2 |
| c-compute optimized | c5ad.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c5ad.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c5ad.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c5ad.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c5ad.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c5ad.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c5d.xlarge | 4 | 8 | 2 |
| c-compute optimized | c5d.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c5d.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c5d.9xlarge | 36 | 72 | 2 |
| c-compute optimized | c5d.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c5d.18xlarge | 72 | 144 | 2 |
| c-compute optimized | c5d.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c5n.xlarge | 4 | 11 | 2.75 |
| c-compute optimized | c5n.2xlarge | 8 | 21 | 2.625 |
| c-compute optimized | c5n.4xlarge | 16 | 42 | 2.625 |
| c-compute optimized | c5n.9xlarge | 36 | 96 | 2.666666667 |
| c-compute optimized | c5n.18xlarge | 72 | 192 | 2.666666667 |
| c-compute optimized | c6g.xlarge | 4 | 8 | 2 |
| c-compute optimized | c6g.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c6g.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c6g.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c6g.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c6g.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c6gd.xlarge | 4 | 8 | 2 |
| c-compute optimized | c6gd.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c6gd.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c6gd.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c6gd.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c6gd.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c6i.xlarge | 4 | 8 | 2 |
| c-compute optimized | c6i.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c6i.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c6i.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c6i.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c6i.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c6i.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c6i.32xlarge | 128 | 256 | 2 |
| c-compute optimized | c6id.xlarge | 4 | 8 | 2 |
| c-compute optimized | c6id.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c6id.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c6id.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c6id.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c6id.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c6id.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c6id.32xlarge | 128 | 256 | 2 |
| c-compute optimized | c6in.xlarge | 4 | 8 | 2 |
| c-compute optimized | c6in.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c6in.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c6in.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c6in.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c6in.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c6in.24xlarge | 96 | 192 | 2 |
| c-compute optimized | c6in.32xlarge | 128 | 256 | 2 |
| c-compute optimized | c7g.xlarge | 4 | 8 | 2 |
| c-compute optimized | c7g.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c7g.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c7g.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c7g.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c7g.16xlarge | 64 | 128 | 2 |
| c-compute optimized | c7gd.xlarge | 4 | 8 | 2 |
| c-compute optimized | c7gd.2xlarge | 8 | 16 | 2 |
| c-compute optimized | c7gd.4xlarge | 16 | 32 | 2 |
| c-compute optimized | c7gd.8xlarge | 32 | 64 | 2 |
| c-compute optimized | c7gd.12xlarge | 48 | 96 | 2 |
| c-compute optimized | c7gd.16xlarge | 64 | 128 | 2 |
Memory optimized instances
R-memory optimized
Almost all instances of this family have 8gb ram per core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| r-memory optimized | r3.xlarge | 4 | 31 | 7.75 |
| r-memory optimized | r3.2xlarge | 8 | 61 | 7.625 |
| r-memory optimized | r3.4xlarge | 16 | 122 | 7.625 |
| r-memory optimized | r3.8xlarge | 32 | 244 | 7.625 |
| r-memory optimized | r4.xlarge | 4 | 31 | 7.75 |
| r-memory optimized | r4.2xlarge | 8 | 61 | 7.625 |
| r-memory optimized | r4.4xlarge | 16 | 122 | 7.625 |
| r-memory optimized | r4.8xlarge | 32 | 244 | 7.625 |
| r-memory optimized | r4.16xlarge | 64 | 488 | 7.625 |
| r-memory optimized | r5.large | 2 | 16 | 8 |
| r-memory optimized | r5.xlarge | 4 | 32 | 8 |
| r-memory optimized | r5.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r5.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r5.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r5.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r5.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r5.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r5a.large | 2 | 16 | 8 |
| r-memory optimized | r5a.xlarge | 4 | 32 | 8 |
| r-memory optimized | r5a.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r5a.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r5a.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r5a.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r5a.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r5a.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r5d.large | 2 | 16 | 8 |
| r-memory optimized | r5d.xlarge | 4 | 32 | 8 |
| r-memory optimized | r5d.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r5d.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r5d.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r5d.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r5d.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r5d.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r5dn.large | 2 | 16 | 8 |
| r-memory optimized | r5dn.xlarge | 4 | 32 | 8 |
| r-memory optimized | r5dn.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r5dn.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r5dn.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r5dn.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r5dn.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r5dn.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r5n.large | 2 | 16 | 8 |
| r-memory optimized | r5n.xlarge | 4 | 32 | 8 |
| r-memory optimized | r5n.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r5n.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r5n.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r5n.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r5n.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r5n.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r6g.large | 2 | 16 | 8 |
| r-memory optimized | r6g.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6g.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6g.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6g.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6g.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6g.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6gd.large | 2 | 16 | 8 |
| r-memory optimized | r6gd.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6gd.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6gd.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6gd.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6gd.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6gd.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6i.large | 2 | 16 | 8 |
| r-memory optimized | r6i.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6i.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6i.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6i.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6i.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6i.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6i.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r6i.32xlarge | 128 | 1024 | 8 |
| r-memory optimized | r6id.large | 2 | 16 | 8 |
| r-memory optimized | r6id.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6id.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6id.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6id.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6id.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6id.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6id.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r6id.32xlarge | 128 | 1024 | 8 |
| r-memory optimized | r6idn.large | 2 | 16 | 8 |
| r-memory optimized | r6idn.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6idn.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6idn.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6idn.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6idn.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6idn.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6idn.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r6idn.32xlarge | 128 | 1024 | 8 |
| r-memory optimized | r6in.large | 2 | 16 | 8 |
| r-memory optimized | r6in.xlarge | 4 | 32 | 8 |
| r-memory optimized | r6in.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r6in.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r6in.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r6in.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r6in.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r6in.24xlarge | 96 | 768 | 8 |
| r-memory optimized | r6in.32xlarge | 128 | 1024 | 8 |
| r-memory optimized | r7g.large | 2 | 16 | 8 |
| r-memory optimized | r7g.xlarge | 4 | 32 | 8 |
| r-memory optimized | r7g.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r7g.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r7g.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r7g.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r7g.16xlarge | 64 | 512 | 8 |
| r-memory optimized | r7gd.large | 2 | 16 | 8 |
| r-memory optimized | r7gd.xlarge | 4 | 32 | 8 |
| r-memory optimized | r7gd.2xlarge | 8 | 64 | 8 |
| r-memory optimized | r7gd.4xlarge | 16 | 128 | 8 |
| r-memory optimized | r7gd.8xlarge | 32 | 256 | 8 |
| r-memory optimized | r7gd.12xlarge | 48 | 384 | 8 |
| r-memory optimized | r7gd.16xlarge | 64 | 512 | 8 |
Z1D-memory optimized
All instances of this family have 8gb ram per core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| z1d-memory optimized | z1d.large | 2 | 16 | 8 |
| z1d-memory optimized | z1d.xlarge | 4 | 32 | 8 |
| z1d-memory optimized | z1d.2xlarge | 8 | 64 | 8 |
| z1d-memory optimized | z1d.3xlarge | 12 | 96 | 8 |
| z1d-memory optimized | z1d.6xlarge | 24 | 192 | 8 |
| z1d-memory optimized | z1d.12xlarge | 48 | 384 | 8 |
Storage optimized instances
D-storage optimized
All instances of this family have 8gb ram per core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| d-storage optimized | d3.xlarge | 4 | 32 | 8 |
| d-storage optimized | d3.2xlarge | 8 | 64 | 8 |
| d-storage optimized | d3.4xlarge | 16 | 128 | 8 |
| d-storage optimized | d3.8xlarge | 32 | 256 | 8 |
| d-storage optimized | d3en.xlarge | 4 | 16 | 4 |
| d-storage optimized | d3en.2xlarge | 8 | 32 | 4 |
| d-storage optimized | d3en.4xlarge | 16 | 64 | 4 |
| d-storage optimized | d3en.6xlarge | 24 | 96 | 4 |
| d-storage optimized | d3en.8xlarge | 32 | 128 | 4 |
| d-storage optimized | d3en.12xlarge | 48 | 192 | 4 |
I-storage optimized
Almost all instances of this family have 8gb ram per core.
| type | name | vcpu | ram | ram per vcpu (gb) |
|---|---|---|---|---|
| i-storage optimized | i2.xlarge | 4 | 31 | 7.75 |
| i-storage optimized | i2.2xlarge | 8 | 61 | 7.625 |
| i-storage optimized | i2.4xlarge | 16 | 122 | 7.625 |
| i-storage optimized | i2.8xlarge | 32 | 244 | 7.625 |
| i-storage optimized | i3.large | 2 | 15 | 7.5 |
| i-storage optimized | i3.xlarge | 4 | 31 | 7.75 |
| i-storage optimized | i3.2xlarge | 8 | 61 | 7.625 |
| i-storage optimized | i3.4xlarge | 16 | 122 | 7.625 |
| i-storage optimized | i3.8xlarge | 32 | 244 | 7.625 |
| i-storage optimized | i3.16xlarge | 64 | 488 | 7.625 |
| i-storage optimized | i3en.large | 2 | 16 | 8 |
| i-storage optimized | i3en.xlarge | 4 | 32 | 8 |
| i-storage optimized | i3en.2xlarge | 8 | 64 | 8 |
| i-storage optimized | i3en.3xlarge | 12 | 96 | 8 |
| i-storage optimized | i3en.6xlarge | 24 | 192 | 8 |
| i-storage optimized | i3en.12xlarge | 48 | 384 | 8 |
| i-storage optimized | i3en.24xlarge | 96 | 768 | 8 |
| i-storage optimized | i4i.large | 2 | 16 | 8 |
| i-storage optimized | i4i.xlarge | 4 | 32 | 8 |
| i-storage optimized | i4i.2xlarge | 8 | 64 | 8 |
| i-storage optimized | i4i.4xlarge | 16 | 128 | 8 |
| i-storage optimized | i4i.8xlarge | 32 | 256 | 8 |
| i-storage optimized | i4i.16xlarge | 64 | 512 | 8 |
| i-storage optimized | i4i.32xlarge | 128 | 1024 | 8 |
Ending notes
- The ram available per core metric peaks at 8gb of ram per core. So, only the number of vCpu can be scaled up. Ram per core cannot be scaled up.
- If AWS says that an instance has 8gb ram, then we will actually get maybe 7.7gb of ram to use. Some ram is taken up by the EC2 management daemons.
That's all. Enjoy.