SERVER-43617 Add metrics on the mongos to indicate the number of shards targeted for CRUD and agg commands

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mongo/s/write_ops/batch_write_exec.h b/src/mongo/s/write_ops/batch_write_exec.h
index c729561630a..9b6773ecb47 100644
--- a/src/mongo/s/write_ops/batch_write_exec.h
+++ b/src/mongo/s/write_ops/batch_write_exec.h
@@ -94,9 +94,11 @@ public:
 
     void noteWriteAt(const HostAndPort& host, repl::OpTime opTime, const OID& electionId);
     void noteTargetedShard(const ShardId& shardId);
+    void noteNumShardsOwningChunks(const int nShardsOwningChunks);
 
     const std::set<ShardId>& getTargetedShards() const;
     const HostOpTimeMap& getWriteOpTimes() const;
+    const boost::optional<int> getNumShardsOwningChunks() const;
 
     // Expose via helpers if this gets more complex
 
@@ -114,6 +116,7 @@ public:
 private:
     std::set<ShardId> _targetedShards;
     HostOpTimeMap _writeOpTimes;
+    boost::optional<int> _numShardsOwningChunks;
 };
 
 }  // namespace mongo