Add a metric to capture write enqueue latency#193
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This captures from when the caller tries to send a request until the request is finally sent on the wire, primarily so we can see when the enqueue time is increasing (a signal for pressure on the IO loop).
akhaku
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May 15, 2026
akhaku
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technically not sent on the wire but passed to the non-blocking socket, right?
Generally LGTM
| if (wc <= 0L || wc < operationAttachedNs) return; | ||
| loopEnqueueToWriteLatency.record(wc - operationAttachedNs, TimeUnit.NANOSECONDS); | ||
| } catch (Throwable t) { | ||
| if (log.isDebugEnabled()) log.debug("recordLoopEnqueueToWriteLatency failed", t); |
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we don't really need the isDebugEnabled check here right since the expression in log.debug is cheap
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This captures from when the caller tries to send a request until the request is finally sent on the wire, primarily so we can see when the enqueue time is increasing (a signal for pressure on the IO loop).