add metric for current config generation

3 files changed, 3 insertions, 0 deletions

diff --git a/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.cpp b/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.cpp
index c2d09fa341b..7e9a5b0ee4a 100644
--- a/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.cpp
+++ b/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.cpp
@@ -29,6 +29,7 @@ ContentProtonMetrics::ProtonExecutorMetrics::~ProtonExecutorMetrics() = default;
 
 ContentProtonMetrics::ContentProtonMetrics()
     : metrics::MetricSet("content.proton", {}, "Search engine metrics", nullptr),
+      configGeneration("config_generation", {}, "The oldest config generation used by this process", this),
       transactionLog(this),
       resourceUsage(this),
       executor(this),
diff --git a/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.h b/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.h
index 127e32ada07..c82a6804380 100644
--- a/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.h
+++ b/searchcore/src/vespa/searchcore/proton/metrics/content_proton_metrics.h
@@ -41,6 +41,7 @@ struct ContentProtonMetrics : metrics::MetricSet
         ~SessionCacheMetrics() override;
     };
 
+    metrics::LongValueMetric configGeneration;
     TransLogServerMetrics transactionLog;
     ResourceUsageMetrics resourceUsage;
     ProtonExecutorMetrics executor;
diff --git a/searchcore/src/vespa/searchcore/proton/server/proton.cpp b/searchcore/src/vespa/searchcore/proton/server/proton.cpp
index 54009ef60f4..34961414d57 100644
--- a/searchcore/src/vespa/searchcore/proton/server/proton.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/proton.cpp
@@ -796,6 +796,7 @@ Proton::updateMetrics(const metrics::MetricLockGuard &)
 {
     {
         ContentProtonMetrics &metrics = _metricsEngine->root();
+        metrics.configGeneration.set(getConfigGeneration());
         auto tls = _tls->getTransLogServer();
         if (tls) {
             metrics.transactionLog.update(tls->getDomainStats());