What Memory Optimised instances are built for
These instances give you more RAM per vCPU than a comparable CPU Optimised package. They suit workloads where the limit is how much data you can hold in memory, rather than how fast you can process it.
Packages start at 2 vCPUs with 20GB RAM and scale to 960GB RAM on a single instance. GPU add-ons are available on any size, and you can resize at any time as your working set grows.
What that extra memory makes possible
When your working set fits in RAM, queries return faster and you spend less time waiting on disk. A high memory instance keeps large datasets resident. A database holds its indexes and hot data in memory and answers more requests per second, a cache like Redis or Memcached holds more keys before it starts evicting, and analytics that scan large datasets run without spilling to disk.
What you can run on a high memory instance
In-memory caches
Run Redis or Memcached with enough headroom to keep your full working set resident. More memory means more cached data and fewer trips to the database behind it.
Larger relational databases
Host PostgreSQL or MySQL where buffer pools and indexes need room to stay in memory. Useful for read-heavy applications and reporting databases that would otherwise hit disk.
Real-time analytics and streaming
Aggregate and query streaming data in memory, where latency comes from disk access rather than raw compute.
In-memory data processing
Run large pandas or Spark jobs that need to hold a dataset in memory to avoid repeated reads from storage.
Memory Optimised or CPU Optimised?
Choose Memory Optimised when your workload is limited by how much data you can keep in RAM. Like in-memory caches, large databases, or real-time analytics. Choose CPU Optimised when it’s limited by processing throughput. Like data crunching, builds, encoding and high-traffic APIs. You can switch between them at any time, so you're not locked to your first choice.
In-memory caches
Every Memory Optimised instance runs on the same platform as the rest of Krystal Cloud. This includes self-healing Block Storage with three copies of your data, automatic failover to a healthy node if hardware fails, and DDoS mitigation included on every instance. Each instance includes 1TB of external transfer, pooled across your organisation, and inbound transfer is free.
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Pooled Outbound Transfer
Memory Optimised (Boulders) Pricing
Outbound transfer is pooled and shared across all virtual machines in your organization.
M-20
- Memory
- 20GB
- vCPU
- 2
- Storage
- 25GB
- Transfer
- 1.00TB
- £70.00/mo£0.0959/hr
M-40
- Memory
- 40GB
- vCPU
- 4
- Storage
- 50GB
- Transfer
- 2.00TB
- £140.00/mo£0.1918/hr
M-80
- Memory
- 80GB
- vCPU
- 8
- Storage
- 100GB
- Transfer
- 3.00TB
- £280.00/mo£0.3836/hr
M-160
- Memory
- 160GB
- vCPU
- 16
- Storage
- 200GB
- Transfer
- 4.00TB
- £560.00/mo£0.7671/hr
M-320
- Memory
- 320GB
- vCPU
- 32
- Storage
- 400GB
- Transfer
- 5.00TB
- £1,120.00/mo£1.5342/hr
M-640
- Memory
- 640GB
- vCPU
- 64
- Storage
- 800GB
- Transfer
- 6.00TB
- £2,240.00/mo£3.0685/hr
M-960
- Memory
- 960GB
- vCPU
- 96
- Storage
- 1200GB
- Transfer
- 7.00TB
- £3,360.00/mo£4.6027/hr
- Add-on
From £0.30/hrPowerful Nvidia GPUs
From rendering to machine learning Krystal Cloud provides GPUs to suit, available on any size virtual machine.
- Add-on
Just £0.05/mo per GBSecure offsite backups
Enhance your disaster recovery plan and protect your data with secure offsite backups.
Why choose Krystal for high memory cloud instances
UK-based engineering support
Our support team are engineers based in the UK. When you get in touch, you're speaking to someone who understands the platform and can work with you to get it sorted.
Pay for what you use
Compute is billed by the second. You only pay for what you use, and you can cancel at any time.
Certified security
Krystal holds ISO 27001 certification for information security and Cyber Essentials Plus, the UK government's cybersecurity certification.
Matched with renewable energy
We match our energy use with renewables, so enough renewable energy is produced to cover what we consume. Krystal is a Certified B Corp and 1% for the Planet member, with over five million trees funded through our reforestation programme.
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Documentation
Read our docs and see how you might use Krystal Cloud in your organization.
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