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RS: Added key/value size limits for flash storage #1644

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Jun 3, 2025
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RS: Added key/value size limits for flash storage #1644

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10 changes: 10 additions & 0 deletions content/operate/rs/databases/auto-tiering/_index.md
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Expand Up @@ -109,6 +109,16 @@ On-premises environments support more deployment options than other environments

{{<warning>}} Auto Tiering is not supported running on network attached storage (NAS), storage area network (SAN), or with local HDD drives. {{</warning>}}

## Size limits for keys and values

Auto Tiering databases cannot store keys or values larger than 4GB in flash storage.

Keys or values larger than 4GB will be stored in RAM only, and warnings will appear in the Redis logs similar to:

```sh
# WARNING: key too big for disk driver, size: 4703717276, key: subactinfo:htable
```

## Next steps

- [Auto Tiering metrics]({{< relref "/operate/rs/references/metrics/auto-tiering" >}})
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