Address tokio contention messages#6279

Merged

lutter merged 13 commits intomasterfrom

Jan 21, 2026

Commits on Jan 20, 2026

graph, store: Replace std::sync::RwLock with parking_lot::RwLock for pool metrics

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graph: Replace std::sync::RwLock with parking_lot::RwLock in LoadManager

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store: Replace std::sync::RwLock with parking_lot::RwLock in store_events

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store: Replace std::sync::RwLock with parking_lot::RwLock in writable

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graph: Replace std::sync::RwLock with parking_lot::RwLock in TimedCache

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store: Replace std::sync::RwLock with parking_lot::RwLock in BlockStore

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graph: Replace std::sync::RwLock with parking_lot::RwLock in MetricsRegistry

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core: Replace std::sync::RwLock with parking_lot::RwLock in SubgraphKeepAlive

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store: Add adaptive TTL cache for chain_head_ptr()

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graph, store: Add lock-free AtomicMovingStats for pool wait tracking

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store: Add HerdCache to chain_head_ptr() to prevent thundering herd

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graph, store: Add time-based connection validation to skip health checks for active connections

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graph, store: Add periodic probe for unavailable database recovery

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