SERVER-35713 Add oldestOpenReadTimestamp to serverStatus output

1 files changed, 8 insertions, 1 deletions

diff --git a/src/mongo/db/server_transactions_metrics.h b/src/mongo/db/server_transactions_metrics.h
index c29dd2b12f2..5bbcb661e8f 100644
--- a/src/mongo/db/server_transactions_metrics.h
+++ b/src/mongo/db/server_transactions_metrics.h
@@ -141,7 +141,7 @@ public:
     /**
      * Appends the accumulated stats to a transactions stats object.
      */
-    void updateStats(TransactionsStats* stats);
+    void updateStats(TransactionsStats* stats, OperationContext* opCtx);
 
 private:
     /**
@@ -150,6 +150,13 @@ private:
      */
     boost::optional<repl::OpTime> _calculateOldestActiveOpTime(WithLock) const;
 
+    /**
+     * Returns the oldest read timestamp in use by any open unprepared transaction. This will
+     * return a null timestamp if there is no oldest open unprepared read timestamp to be
+     * returned.
+     */
+    static Timestamp _getOldestOpenUnpreparedReadTimestamp(OperationContext* opCtx);
+
     //
     // Member variables, excluding atomic variables, are labeled with the following code to
     // indicate the synchronization rules for accessing them.