diff --git a/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/actor/LaskentaResurssiProvider.java b/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/actor/LaskentaResurssiProvider.java
index 885ff8d09..d5cae577c 100644
--- a/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/actor/LaskentaResurssiProvider.java
+++ b/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/actor/LaskentaResurssiProvider.java
@@ -140,6 +140,13 @@ public void lueParametrit() {
         });
   }
 
+  public int jononpituus() {
+    return this.limiters.values().stream()
+        .map(l -> l.getWaiting())
+        .max(Integer::compareTo)
+        .orElseThrow();
+  }
+
   private void tallennaLokitJaMetriikat(
       String hakukohdeOid,
       Map<String, Duration> waitDurations,
diff --git a/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/resource/ValintalaskentaKerrallaResource.java b/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/resource/ValintalaskentaKerrallaResource.java
index d82bd8774..aaaadf768 100644
--- a/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/resource/ValintalaskentaKerrallaResource.java
+++ b/src/main/java/fi/vm/sade/valinta/kooste/valintalaskenta/resource/ValintalaskentaKerrallaResource.java
@@ -55,6 +55,11 @@ private static Throwable getUnderlyingCause(Throwable t) {
     return t;
   }
 
+  @GetMapping(value = "/lahtotiedot/jononpituus", produces = MediaType.APPLICATION_JSON_VALUE)
+  public ResponseEntity<Integer> jononpituus() {
+    return ResponseEntity.status(HttpStatus.OK).body(this.laskentaResurssiProvider.jononpituus());
+  }
+
   @GetMapping(
       value = "/haku/{hakuOid}/hakukohde/{hakukohdeOid}/lahtotiedot",
       produces = MediaType.APPLICATION_JSON_VALUE)