Extend metrics comment to describe unit used for heart beat age (seconds).

1 files changed, 1 insertions, 1 deletions

diff --git a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
index b5c6df972a8..713a03810b9 100644
--- a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
+++ b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
@@ -272,7 +272,7 @@ DocumentDBTaggedMetrics::DocumentDBTaggedMetrics(const vespalib::string &docType
       bucketMove(this),
       totalMemoryUsage(this),
       totalDiskUsage("disk_usage", {}, "The total disk usage (in bytes) for this document db", this),
-      heart_beat_age("heart_beat_age", {}, "How long ago heart beat maintenace job was run", this),
+      heart_beat_age("heart_beat_age", {}, "How long ago (in seconds) heart beat maintenace job was run", this),
       maxNumThreads(maxNumThreads_)
 {
 }