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Support fixed mbus throttle window size via env var #35968

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Merged
bjorncs merged 1 commit into from
Feb 19, 2026
+9 −0
Merged

Support fixed mbus throttle window size via env var #35968

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9 changes: 9 additions & 0 deletions ...-plugin/src/main/java/com/yahoo/document/restapi/resource/InstrumentedThrottlePolicy.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,9 +23,18 @@ class InstrumentedThrottlePolicy extends DynamicThrottlePolicy {
private final AtomicInteger previousMaxPending = new AtomicInteger(Integer.MIN_VALUE);
private final Metric metric;

private static final String WINDOW_SIZE_ENV = "VESPA_MBUS_THROTTLE_WINDOW_SIZE";

@Inject
InstrumentedThrottlePolicy(Metric metric) {
setResizeRate(2); // Increase the window size update rate by lowering resize rate... ¯\_(ツ)_/¯
var windowSize = System.getenv(WINDOW_SIZE_ENV);
if (windowSize != null) {
int size = Integer.parseInt(windowSize);
setMinWindowSize(size);
setMaxWindowSize(size);
log.info("Fixed throttle window size set to %d from env var '%s'".formatted(size, WINDOW_SIZE_ENV));
}
this.metric = metric;
}

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