docs: update capacity-planning for block storage #6936
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Update capacity planning guide for blocks storage with detailed parameters and component requirements Signed-off-by: Charlie Le <[email protected]>
yeya24
reviewed
Aug 3, 2025
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| Some key parameters to consider: | ||
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| 1. **Number of active series**: If you have Prometheus already, you can query [`prometheus_tsdb_head_series`](https://prometheus.io/docs/prometheus/latest/querying/functions/#prometheus_tsdb_head_series) to see this number. |
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We can keep this but maybe also refer to the Cortex ingester metric as well? A lot of users might using non Prometheus collector such as Otel today.
| Some key parameters to consider: | ||
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| 1. **Number of active series**: If you have Prometheus already, you can query [`prometheus_tsdb_head_series`](https://prometheus.io/docs/prometheus/latest/querying/functions/#prometheus_tsdb_head_series) to see this number. | ||
| 2. **Sampling rate**: e.g. a new sample for each series every minute (the default Prometheus [scrape_interval](https://prometheus.io/docs/prometheus/latest/configuration/configuration/)). Multiply this by the number of active series to get the total rate at which samples will arrive at Cortex. |
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Can we just say scrape interval? Sampling rate as a term seems mainly for tracing.
| ## Production Recommendations | ||
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| 1. **Enable caching**: Configure [index, chunks, and metadata caching](../blocks-storage/production-tips.md#caching) for store-gateways and queriers. | ||
| 2. **Enable bucket index**: Use [bucket index](../blocks-storage/bucket-index.md) to reduce object storage API calls. |
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We should mark bucket index as non experimental in Cortex.
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What this PR does: Updates capacity planning guide for blocks storage with detailed parameters and component requirements
Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]