diff --git a/src/internal/monitoring/otel.ts b/src/internal/monitoring/otel.ts
index 5741c737..e801808a 100644
--- a/src/internal/monitoring/otel.ts
+++ b/src/internal/monitoring/otel.ts
@@ -33,6 +33,7 @@ import { TenantConnection } from '@internal/database'
 import { S3Store } from '@tus/s3-store'
 import { Upload } from '@aws-sdk/lib-storage'
 import { StreamSplitter } from '@tus/server'
+import { PgLock } from '@storage/protocols/tus'
 
 const tracingEnabled = process.env.TRACING_ENABLED === 'true'
 const headersEnv = process.env.OTEL_EXPORTER_OTLP_TRACES_HEADERS || ''
@@ -259,6 +260,11 @@ const sdk = new NodeSDK({
         },
       },
     }),
+    new ClassInstrumentation({
+      targetClass: PgLock,
+      enabled: true,
+      methodsToInstrument: ['lock', 'unlock', 'acquireLock'],
+    }),
     new ClassInstrumentation({
       targetClass: S3Client,
       enabled: true,
diff --git a/src/storage/protocols/tus/postgres-locker.ts b/src/storage/protocols/tus/postgres-locker.ts
index cf4fc025..36f67b37 100644
--- a/src/storage/protocols/tus/postgres-locker.ts
+++ b/src/storage/protocols/tus/postgres-locker.ts
@@ -1,10 +1,10 @@
 import { Lock, Locker, RequestRelease } from '@tus/server'
-import { clearTimeout } from 'timers'
-import EventEmitter from 'events'
-import { Database, DBError } from '../../database'
+import { clearTimeout } from 'node:timers'
+import EventEmitter from 'node:events'
+import { Database } from '../../database'
 import { PubSubAdapter } from '@internal/pubsub'
 import { UploadId } from './upload-id'
-import { ERRORS } from '@internal/errors'
+import { ErrorCode, ERRORS, StorageBackendError } from '@internal/errors'
 
 const REQUEST_LOCK_RELEASE_MESSAGE = 'REQUEST_LOCK_RELEASE'
 
@@ -94,7 +94,7 @@ export class PgLock implements Lock {
         await db.mustLockObject(uploadId.bucket, uploadId.objectName, uploadId.version)
         return true
       } catch (e) {
-        if (e instanceof DBError && e.message === 'resource_locked') {
+        if (e instanceof StorageBackendError && e.code === ErrorCode.ResourceLocked) {
           await this.notifier.release(id)
           await new Promise((resolve) => {
             setTimeout(resolve, 500)