We record a lot of metrics in serverStatus that are of type CounterMetric. The increment() function of CounterMetric uses atomic fetch_add() which by default uses memory order std::memory_order_seq_cst that is expensive since it needs to synchronize cpu cores with memory fences. Since they are for metrics, it seems we can use fetchAndAddRelaxed instead which uses a relaxed memory ordering, to reduce the synchronization overheads.
- is depended on by
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SERVER-78972 Increment the global writeConflict counter immediately without waiting until recordCurOpMetrics is called
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- Backlog
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- is duplicated by
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SERVER-78960 Investigate if CounterMetric can do increment using fetchAndAddRelaxed for better performance
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- Closed
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