fix(syncing-server): add option to define otel ratio

packages/domain-events-infra/src/Infra/OpenTelemetry/OpenTelemetrySDK.ts

@@ -17,7 +17,10 @@ import { ExpressInstrumentation } from '@opentelemetry/instrumentation-express'
 export class OpenTelemetrySDK implements OpenTelemetrySDKInterface {
   private declare sdk: OpenTelemetrySDKNode.NodeSDK
 
-  constructor(private serviceName: string) {
+  constructor(
+    private serviceName: string,
+    private spanRatio?: number,
+  ) {
     this.build()
   }
 
@@ -41,8 +44,10 @@ export class OpenTelemetrySDK implements OpenTelemetrySDKInterface {
       },
     })
 
+    const ratio = this.spanRatio ?? 0.01
+
     this.sdk = new OpenTelemetrySDKNode.NodeSDK({
-      sampler: new OpenTelemetrySDKNode.tracing.TraceIdRatioBasedSampler(0.01),
+      sampler: new OpenTelemetrySDKNode.tracing.TraceIdRatioBasedSampler(ratio),
       textMapPropagator: new AWSXRayPropagator(),
       instrumentations: [
         new HttpInstrumentation({

packages/syncing-server/src/Bootstrap/Container.ts

@@ -237,6 +237,7 @@ export class ContainerConfigLoader {
     const isConfiguredForHomeServerOrSelfHosting = isConfiguredForHomeServer || isConfiguredForSelfHosting
     const isSecondaryDatabaseEnabled = env.get('SECONDARY_DB_ENABLED', true) === 'true'
     const isConfiguredForInMemoryCache = env.get('CACHE_TYPE', true) === 'memory'
+    const openTelemetryRatio = env.get('OTEL_SPAN_RATIO', true) ? +env.get('OTEL_SPAN_RATIO', true) : 0.01
 
     container
       .bind<boolean>(TYPES.Sync_IS_CONFIGURED_FOR_HOME_SERVER_OR_SELF_HOSTING)
@@ -250,6 +251,7 @@ export class ContainerConfigLoader {
             this.mode === 'server'
               ? ServiceIdentifier.NAMES.SyncingServer
               : ServiceIdentifier.NAMES.SyncingServerWorker,
+            openTelemetryRatio,
           ),
         )
     }