In an environment where a large number of volumes are attached to servers, an Ops Center Administrator internal service (rainier) can stop working, and the following message is displayed:
Failed to get data from API. Try again.
Why this happens
This sometimes occurs when a large number of volumes are attached to servers. The following table provides estimated configurations for which the symptom might occur.
| Average number of servers per volume | Number of volumes |
|---|---|
| 1 | 30,000 or higher |
| 2 | 12,000 or higher |
| 4 | 6,000 or higher |
| 8 | 3,000 or higher |
| 16 | 1,500 or higher |
| 32 | 800 or higher |
| 64 | 400 or higher |
| 128 | 200 or higher |
Select a memory setting pattern
When the above conditions are met, decide on a memory setting pattern (A or B) based on the following table and follow the steps in Changing the memory settings.
| Average number of servers per volume | Number of volumes | Memory settting pattern |
|---|---|---|
| 1 | 30,000 or higher | A |
| 2 | 12,000 to 39,999 | A |
| 40,000 or higher | B | |
| 4 | 6,000 to 19,999 | A |
| 20,000 or higher | B | |
| 8 | 3,000 to 9,999 | A |
| 10,000 or higher | B | |
| 16 | 1,500 to 4,999 | A |
| 5,000 or higher | B | |
| 32 | 800 to 2,399 | A |
| 2,400 or higher | B | |
| 64 | 400 to 1,199 | A |
| 1,200 or higher | B | |
| 128 | 200 to 599 | A |
| 600 or higher | B |
Prepare additional usable physical memory based on the memory setting pattern that you selected in the table above:
- Memory setting pattern A: + 2 GiB
- Memory setting pattern B: + 6 GiB