Node CPU | Reservation Rule | Description |
1c <= CPU <= 4c | 0.1c is reserved. | - |
4c < CPU <= 64c | 0.1c is reserved for the 4c part, and 2.5% for the excessive part. | For example, if CPU = 32c, reserved resources = 0.1 + (32 - 4) * 2.5% = 0.8c. |
64c < CPU <= 128c | 0.1c is reserved for the 4c part, 2.5% for the 4c to 64c part, and 1.25% for the excessive part. | For example, if CPU = 96c, reserved resources = 0.1 + (64 - 4) * 2.5% + (96 - 64) * 1.25% = 2c. |
CPU > 128c | 0.1c is reserved for the 4c part, 2.5% for the 4c to 64c part, 1.25% for the 64c to 128c part, and 0.5% for the excessive part. | For example, if CPU = 196c, reserved resources = 0.1 + (64 - 4) * 2.5% + (128 - 64) * 1.25% + (196 - 128) * 0.5% = 2.74c. |
Node Memory | Reservation Rule | Description |
1 GB <= Memory <= 4 GB | 25% is reserved. | For example, if memory = 2 GB, reserved resources = 2 * 25% = 512 MB. |
4 GB < Memory <= 8 GB | 25% is reserved for the 4 GB part, and 20% for the excessive part. | For example, if memory = 8 GB, reserved resources = 4 * 25% + (8 - 4) * 20% = 1,843 MB. |
8 GB < Memory <= 16 GB | 25% is reserved for the 4 GB part, 20% for the 4 GB to 8 GB part, and 10% for the excessive part. | For example, if memory = 12 GB, reserved resources = 4 * 25% + (8 - 4) * 20% + (12 - 8) * 10% = 2,252 MB. |
16 GB < Memory <= 128 GB | 25% is reserved for the 4 GB part, 20% for the 4 GB to 8 GB part, 10% for the 8 GB to 16 GB part, and 6% for the excessive part. | For example, if memory = 32 GB, reserved resources = 4 * 25% + (8 - 4) * 20% + (16 - 8) * 10% + (32 - 16) * 6% = 3,645 MB. |
Memory > 128 GB | 25% is reserved for the 4 GB part, 20% for the 4 GB to 8 GB part, 10% for the 8 GB to 16 GB part, 6% for the 16 GB to 128 GB part, and 2% for the excessive part. | For example, if memory = 320 GB, reserved resources = 4 * 25% + (8 - 4) * 20% + (16 - 8) * 10% + (128 - 16) * 6% + (320 - 128) * 2% = 13,475 MB. |
kube-reserved
for node resource reservation. We recommend you reserve sufficient CPU and memory resources for add-ons to ensure node stability.NODE_NAME
with the actual node name) to check the allocable node resources in a cluster. The output result contains Capacity
and Allocatable
fields, along with measurements of CPU, memory, and temporary storage.kubectl describe node NODE_NAME | grep Allocatable -B 7 -A 6
Was this page helpful?