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Add Query Resource Based Eviction #7488

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37bb3b8
Add Query Resource Based Eviction
eeldaly May 7, 2026
f64ba8d
update changelog
eeldaly May 7, 2026
4938f3f
update guarantees
eeldaly May 7, 2026
cb9de7d
lint
eeldaly May 7, 2026
0a01fbc
lint atomic
eeldaly May 7, 2026
1de552c
lint modernize
eeldaly May 7, 2026
9bb0269
use configs.evictionConfig instead of copy
eeldaly May 11, 2026
5ddc12b
Panic on eivctor creation failures
eeldaly May 11, 2026
63708b6
Add support for evicting multiple queries per cycle
eeldaly May 11, 2026
b4b217b
Doc gen
eeldaly May 11, 2026
225bf62
Merge branch 'master' into query-eviction
eeldaly May 11, 2026
5a3e742
lint
eeldaly May 11, 2026
9ea39e9
Add log. Remove unneeded err
eeldaly May 19, 2026
25a8665
Merge branch 'master' into query-eviction
eeldaly May 19, 2026
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -10,6 +10,7 @@
* [FEATURE] Memberlist: Add `-memberlist.cluster-label` and `-memberlist.cluster-label-verification-disabled` to prevent accidental cross-cluster gossip joins and support rolling label rollout. #7385
* [FEATURE] Querier: Add timeout classification to classify query timeouts as 4XX (user error) or 5XX (system error) based on phase timing. When enabled, queries that spend most of their time in PromQL evaluation return `422 Unprocessable Entity` instead of `503 Service Unavailable`. #7374
* [FEATURE] Querier: Implement Resource Based Throttling in Querier. #7442
* [FEATURE] Querier: Add resource-based query eviction that automatically cancels the heaviest running query when CPU or heap utilization exceeds configured thresholds. #7488
* [ENHANCEMENT] Upgrade prometheus alertmanager version to v0.32.1. #7462
* [ENHANCEMENT] Tenant Federation: Avoid purging the regex resolver LRU cache on user-sync ticks when the set of known users has not changed. #7489
* [ENHANCEMENT] Parquet Converter: Add a ring status page to expose the ring status. #7455
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42 changes: 42 additions & 0 deletions docs/blocks-storage/querier.md
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Expand Up @@ -330,6 +330,48 @@ querier:
# type. 0 to disable.
# CLI flag: -querier.query-protection.rejection.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

eviction:
threshold:
# EXPERIMENTAL: Max CPU utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in
# percentage, between 0 and 1. monitored_resources config must include
# the resource type. 0 to disable.
# CLI flag: -querier.query-protection.eviction.threshold.cpu-utilization
[cpu_utilization: <float> | default = 0]

# EXPERIMENTAL: Max heap utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in
# percentage, between 0 and 1. monitored_resources config must include
# the resource type. 0 to disable.
# CLI flag: -querier.query-protection.eviction.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

# EXPERIMENTAL: How frequently the evictor checks system resource
# utilization.
# CLI flag: -querier.query-protection.eviction.check-interval
[check_interval: <duration> | default = 1s]

# EXPERIMENTAL: Number of check intervals to wait after an eviction before
# evicting again.
# CLI flag: -querier.query-protection.eviction.cooldown-period
[cooldown_period: <int> | default = 3]

# EXPERIMENTAL: The query metric used to determine the heaviest query for
# eviction. Supported values: fetched_samples, fetched_series,
# fetched_chunks, fetched_chunk_bytes.
# CLI flag: -querier.query-protection.eviction.eviction-metric
[eviction_metric: <string> | default = "fetched_samples"]
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@justinjung04 justinjung04 May 21, 2026

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any particular reason you chose fetched_samples as default? is there some data you can share about each metric's correlation to the query heaviness?


# EXPERIMENTAL: Minimum time a query must be running before it becomes
# eligible for eviction. Queries younger than this are ignored.
# CLI flag: -querier.query-protection.eviction.min-query-age
[min_query_age: <duration> | default = 10s]

# EXPERIMENTAL: Maximum number of queries to evict in a single check cycle
# when resource thresholds are breached.
# CLI flag: -querier.query-protection.eviction.max-evictions-per-cycle
[max_evictions_per_cycle: <int> | default = 1]
```

### `blocks_storage_config`
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42 changes: 42 additions & 0 deletions docs/blocks-storage/store-gateway.md
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Expand Up @@ -372,6 +372,48 @@ store_gateway:
# CLI flag: -store-gateway.query-protection.rejection.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

eviction:
threshold:
# EXPERIMENTAL: Max CPU utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in
# percentage, between 0 and 1. monitored_resources config must include
# the resource type. 0 to disable.
# CLI flag: -store-gateway.query-protection.eviction.threshold.cpu-utilization
[cpu_utilization: <float> | default = 0]

# EXPERIMENTAL: Max heap utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in
# percentage, between 0 and 1. monitored_resources config must include
# the resource type. 0 to disable.
# CLI flag: -store-gateway.query-protection.eviction.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

# EXPERIMENTAL: How frequently the evictor checks system resource
# utilization.
# CLI flag: -store-gateway.query-protection.eviction.check-interval
[check_interval: <duration> | default = 1s]

# EXPERIMENTAL: Number of check intervals to wait after an eviction before
# evicting again.
# CLI flag: -store-gateway.query-protection.eviction.cooldown-period
[cooldown_period: <int> | default = 3]

# EXPERIMENTAL: The query metric used to determine the heaviest query for
# eviction. Supported values: fetched_samples, fetched_series,
# fetched_chunks, fetched_chunk_bytes.
# CLI flag: -store-gateway.query-protection.eviction.eviction-metric
[eviction_metric: <string> | default = "fetched_samples"]

# EXPERIMENTAL: Minimum time a query must be running before it becomes
# eligible for eviction. Queries younger than this are ignored.
# CLI flag: -store-gateway.query-protection.eviction.min-query-age
[min_query_age: <duration> | default = 10s]

# EXPERIMENTAL: Maximum number of queries to evict in a single check cycle
# when resource thresholds are breached.
# CLI flag: -store-gateway.query-protection.eviction.max-evictions-per-cycle
[max_evictions_per_cycle: <int> | default = 1]

hedged_request:
# If true, hedged requests are applied to object store calls. It can help
# with reducing tail latency.
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126 changes: 126 additions & 0 deletions docs/configuration/config-file-reference.md
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Expand Up @@ -3877,6 +3877,48 @@ query_protection:
# disable.
# CLI flag: -ingester.query-protection.rejection.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

eviction:
threshold:
# EXPERIMENTAL: Max CPU utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -ingester.query-protection.eviction.threshold.cpu-utilization
[cpu_utilization: <float> | default = 0]

# EXPERIMENTAL: Max heap utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -ingester.query-protection.eviction.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

# EXPERIMENTAL: How frequently the evictor checks system resource
# utilization.
# CLI flag: -ingester.query-protection.eviction.check-interval
[check_interval: <duration> | default = 1s]

# EXPERIMENTAL: Number of check intervals to wait after an eviction before
# evicting again.
# CLI flag: -ingester.query-protection.eviction.cooldown-period
[cooldown_period: <int> | default = 3]

# EXPERIMENTAL: The query metric used to determine the heaviest query for
# eviction. Supported values: fetched_samples, fetched_series,
# fetched_chunks, fetched_chunk_bytes.
# CLI flag: -ingester.query-protection.eviction.eviction-metric
[eviction_metric: <string> | default = "fetched_samples"]

# EXPERIMENTAL: Minimum time a query must be running before it becomes
# eligible for eviction. Queries younger than this are ignored.
# CLI flag: -ingester.query-protection.eviction.min-query-age
[min_query_age: <duration> | default = 10s]

# EXPERIMENTAL: Maximum number of queries to evict in a single check cycle
# when resource thresholds are breached.
# CLI flag: -ingester.query-protection.eviction.max-evictions-per-cycle
[max_evictions_per_cycle: <int> | default = 1]
```

### `ingester_client_config`
Expand Down Expand Up @@ -5032,6 +5074,48 @@ query_protection:
# disable.
# CLI flag: -querier.query-protection.rejection.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

eviction:
threshold:
# EXPERIMENTAL: Max CPU utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -querier.query-protection.eviction.threshold.cpu-utilization
[cpu_utilization: <float> | default = 0]

# EXPERIMENTAL: Max heap utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -querier.query-protection.eviction.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

# EXPERIMENTAL: How frequently the evictor checks system resource
# utilization.
# CLI flag: -querier.query-protection.eviction.check-interval
[check_interval: <duration> | default = 1s]

# EXPERIMENTAL: Number of check intervals to wait after an eviction before
# evicting again.
# CLI flag: -querier.query-protection.eviction.cooldown-period
[cooldown_period: <int> | default = 3]

# EXPERIMENTAL: The query metric used to determine the heaviest query for
# eviction. Supported values: fetched_samples, fetched_series,
# fetched_chunks, fetched_chunk_bytes.
# CLI flag: -querier.query-protection.eviction.eviction-metric
[eviction_metric: <string> | default = "fetched_samples"]

# EXPERIMENTAL: Minimum time a query must be running before it becomes
# eligible for eviction. Queries younger than this are ignored.
# CLI flag: -querier.query-protection.eviction.min-query-age
[min_query_age: <duration> | default = 10s]

# EXPERIMENTAL: Maximum number of queries to evict in a single check cycle
# when resource thresholds are breached.
# CLI flag: -querier.query-protection.eviction.max-evictions-per-cycle
[max_evictions_per_cycle: <int> | default = 1]
```

### `query_frontend_config`
Expand Down Expand Up @@ -6801,6 +6885,48 @@ query_protection:
# CLI flag: -store-gateway.query-protection.rejection.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

eviction:
threshold:
# EXPERIMENTAL: Max CPU utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -store-gateway.query-protection.eviction.threshold.cpu-utilization
[cpu_utilization: <float> | default = 0]

# EXPERIMENTAL: Max heap utilization that this instance can reach before
# evicting the heaviest running query (across all tenants) in percentage,
# between 0 and 1. monitored_resources config must include the resource
# type. 0 to disable.
# CLI flag: -store-gateway.query-protection.eviction.threshold.heap-utilization
[heap_utilization: <float> | default = 0]

# EXPERIMENTAL: How frequently the evictor checks system resource
# utilization.
# CLI flag: -store-gateway.query-protection.eviction.check-interval
[check_interval: <duration> | default = 1s]

# EXPERIMENTAL: Number of check intervals to wait after an eviction before
# evicting again.
# CLI flag: -store-gateway.query-protection.eviction.cooldown-period
[cooldown_period: <int> | default = 3]

# EXPERIMENTAL: The query metric used to determine the heaviest query for
# eviction. Supported values: fetched_samples, fetched_series,
# fetched_chunks, fetched_chunk_bytes.
# CLI flag: -store-gateway.query-protection.eviction.eviction-metric
[eviction_metric: <string> | default = "fetched_samples"]

# EXPERIMENTAL: Minimum time a query must be running before it becomes
# eligible for eviction. Queries younger than this are ignored.
# CLI flag: -store-gateway.query-protection.eviction.min-query-age
[min_query_age: <duration> | default = 10s]

# EXPERIMENTAL: Maximum number of queries to evict in a single check cycle
# when resource thresholds are breached.
# CLI flag: -store-gateway.query-protection.eviction.max-evictions-per-cycle
[max_evictions_per_cycle: <int> | default = 1]

hedged_request:
# If true, hedged requests are applied to object store calls. It can help with
# reducing tail latency.
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7 changes: 7 additions & 0 deletions docs/configuration/v1-guarantees.md
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Expand Up @@ -130,6 +130,13 @@ Currently experimental features are:
- `-validation.max-label-cardinality-for-unoptimized-regex` (int) - maximum label cardinality
- `-validation.max-total-label-value-length-for-unoptimized-regex` (int) - maximum total length of all label values in bytes
- HATracker: `-distributor.ha-tracker.enable-startup-sync` (bool) - If enabled, fetches all tracked keys on startup to populate the local cache.
- Querier: Resource-based query eviction
- `-querier.query-protection.eviction.threshold.cpu-utilization` (float)
- `-querier.query-protection.eviction.threshold.heap-utilization` (float)
- `-querier.query-protection.eviction.check-interval` (duration)
- `-querier.query-protection.eviction.cooldown-period` (int)
- `-querier.query-protection.eviction.eviction-metric` (string)
- `-querier.query-protection.eviction.min-query-age` (duration)
- Ingester: Active Series Tracker
- Per-tenant `active_series_trackers` configuration in runtime config overrides
- Counts active series matching PromQL label matchers and exposes `cortex_ingester_active_series_per_tracker` metric
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