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Type:
Bug
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Resolution: Gone away
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Query Planning
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Query Optimization
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ALL
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QO 2024-05-27, QO 2024-06-10
- TSAN fails an assertion if more than 64 locks are active on a single thread
- https://github.com/llvm-mirror/compiler-rt/blob/master/lib/sanitizer_common/sanitizer_deadlock_detector.h#L67
CHECK_LT(n_all_locks_, ARRAY_SIZE(all_locks_with_contexts_));
- SBE plan cache creates one partition (and one mutex) for each core in the system:
globalPlanCache = std::make_unique<sbe::PlanCache>(cappedCacheSize, ProcessInfo::getNumLogicalCores());
The rhel80-xxlarge distro uses a c6a.24xlarge machine with 96 cores. This results in attempting to lock 96 partitions when clearing the cache and exceeds the 64 lock limit in TSAN.
- is related to
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SERVER-90940 Partition the Classic plan cache to reduce lock contention
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- Needs Scheduling
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- related to
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SERVER-73290 WiredTiger hits limits of TSAN deadlock detector
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- Backlog
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