SERVER-53842 Count the number of resharding attempts in resharding metrics

3 files changed, 17 insertions, 8 deletions

diff --git a/src/mongo/db/s/resharding/resharding_metrics.cpp b/src/mongo/db/s/resharding/resharding_metrics.cpp
index f8f21814d23..5fabcb00e9e 100644
--- a/src/mongo/db/s/resharding/resharding_metrics.cpp
+++ b/src/mongo/db/s/resharding/resharding_metrics.cpp
@@ -39,9 +39,10 @@ namespace {
 constexpr auto kAnotherOperationInProgress = "Another operation is in progress";
 constexpr auto kNoOperationInProgress = "No operation is in progress";
 
-constexpr auto kSuccessfulOps = "successfulOperations";
-constexpr auto kFailedOps = "failedOperations";
-constexpr auto kCanceledOps = "canceledOperations";
+constexpr auto kTotalOps = "countReshardingOperations";
+constexpr auto kSuccessfulOps = "countReshardingSuccessful";
+constexpr auto kFailedOps = "countReshardingFailures";
+constexpr auto kCanceledOps = "countReshardingCanceled";
 constexpr auto kOpTimeElapsed = "totalOperationTimeElapsed";
 constexpr auto kOpTimeRemaining = "remainingOperationTimeEstimated";
 constexpr auto kDocumentsToCopy = "approxDocumentsToCopy";
@@ -79,6 +80,7 @@ void ReshardingMetrics::onStart() noexcept {
     // Create a new operation and record the time it started.
     _currentOp.emplace(_svcCtx->getFastClockSource());
     _currentOp->runningOperation.start();
+    _started++;
 }
 
 void ReshardingMetrics::onCompletion(ReshardingMetrics::OperationStatus status) noexcept {
@@ -310,6 +312,7 @@ void ReshardingMetrics::serialize(BSONObjBuilder* bob, ReporterOptions::Role rol
     stdx::lock_guard<Latch> lk(_mutex);
 
     if (role == ReporterOptions::Role::kAll) {
+        bob->append(kTotalOps, _started);
         bob->append(kSuccessfulOps, _succeeded);
         bob->append(kFailedOps, _failed);
         bob->append(kCanceledOps, _canceled);
diff --git a/src/mongo/db/s/resharding/resharding_metrics.h b/src/mongo/db/s/resharding/resharding_metrics.h
index 2f0ce2fbc16..2f5f1190f11 100644
--- a/src/mongo/db/s/resharding/resharding_metrics.h
+++ b/src/mongo/db/s/resharding/resharding_metrics.h
@@ -105,8 +105,9 @@ private:
 
     mutable Mutex _mutex = MONGO_MAKE_LATCH("ReshardingMetrics::_mutex");
 
-    // The following maintain the number of operations that succeeded, failed with an unrecoverable
-    // error, and canceled by the user, respectively.
+    // The following maintain the number of resharding operations that have started, succeeded,
+    // failed with an unrecoverable error, and canceled by the user, respectively.
+    int64_t _started = 0;
     int64_t _succeeded = 0;
     int64_t _failed = 0;
     int64_t _canceled = 0;
diff --git a/src/mongo/db/s/resharding/resharding_metrics_test.cpp b/src/mongo/db/s/resharding/resharding_metrics_test.cpp
index 909634240f8..798e7c2a103 100644
--- a/src/mongo/db/s/resharding/resharding_metrics_test.cpp
+++ b/src/mongo/db/s/resharding/resharding_metrics_test.cpp
@@ -129,9 +129,14 @@ TEST_F(ReshardingMetricsTest, TestOperationStatus) {
         getMetrics()->onCompletion(ReshardingMetrics::OperationStatus::kCanceled);
     }
 
-    checkMetrics("successfulOperations", kNumSuccessfulOps);
-    checkMetrics("failedOperations", kNumFailedOps);
-    checkMetrics("canceledOperations", kNumCanceledOps);
+    checkMetrics("countReshardingSuccessful", kNumSuccessfulOps);
+    checkMetrics("countReshardingFailures", kNumFailedOps);
+    checkMetrics("countReshardingCanceled", kNumCanceledOps);
+
+    const auto total = kNumSuccessfulOps + kNumFailedOps + kNumCanceledOps;
+    checkMetrics("countReshardingOperations", total);
+    getMetrics()->onStart();
+    checkMetrics("countReshardingOperations", total + 1);
 }
 
 TEST_F(ReshardingMetricsTest, TestElapsedTime) {