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fix(alarm): exclude very low volume chains from 4xx alarm (no route) #810

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Aug 14, 2024
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4 changes: 3 additions & 1 deletion bin/stacks/routing-api-stack.ts
Original file line number Diff line number Diff line change
Expand Up @@ -401,8 +401,10 @@ export class RoutingAPIStack extends cdk.Stack {
return
}
const alarmName = `RoutingAPI-SEV3-4XXAlarm-ChainId: ${chainId.toString()}`
// We only want to alert if the volume is high enough over default period (5m) for 4xx errors (no route).
const invocationsThreshold = 500
const metric = new MathExpression({
expression: '100*(response400/invocations)',
expression: `IF(invocations > ${invocationsThreshold}, 100*(response400/invocations), 0)`,
usingMetrics: {
invocations: new aws_cloudwatch.Metric({
namespace: 'Uniswap',
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