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wojcik-dorota committed Dec 13, 2024
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6 changes: 3 additions & 3 deletions docs/products/clickhouse/howto/clickhouse-query-cache.md
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Expand Up @@ -10,8 +10,8 @@ by caching query results.

When the Aiven for
[ClickHouse query cache](https://clickhouse.com/docs/en/operations/query-cache) is enabled,
multiple identical `SELECT` queries run simultaneously are computed only once,
and further executions of the same query are served directly from the cache.
multiple identical `SELECT` queries running simultaneously are computed only once.
Subsequent executions of the same query are served directly from the cache.

:::important
By default, the Aiven for ClickHouse query cache is disabled for all `SELECT` queries.
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## Limitation

- Cached results are not invalidated or discarded when the underlying data (the result
of a SELECT query) changes, which might cause returning stale results.
of a `SELECT` query) changes, which might cause returning stale results.
- Maximum query cache size: 64 MiB for each GiB of RAM (for example, 256 MiB for a 4-GiB
service or 1 GiB for a 16-GiB service)
- Maximum number of query cache entries: 64 entries for each GiB of RAM (for example,
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