2 files changed, 6 insertions, 0 deletions
diff --git a/include/leveldb/cache.h b/include/leveldb/cache.h
index 5f86cd0..6819d5b 100644
--- a/include/leveldb/cache.h
+++ b/include/leveldb/cache.h
@@ -88,6 +88,10 @@ class Cache {
   // leveldb may change Prune() to a pure abstract method.
   virtual void Prune() {}
 
+  // Return an estimate of the combined charges of all elements stored in the
+  // cache.
+  virtual size_t TotalCharge() const = 0;
+
  private:
   void LRU_Remove(Handle* e);
   void LRU_Append(Handle* e);
diff --git a/include/leveldb/db.h b/include/leveldb/db.h
index 4c169bf..53c7068 100644
--- a/include/leveldb/db.h
+++ b/include/leveldb/db.h
@@ -115,6 +115,8 @@ class DB {
   //     about the internal operation of the DB.
   //  "leveldb.sstables" - returns a multi-line string that describes all
   //     of the sstables that make up the db contents.
+  //  "leveldb.approximate-memory-usage" - returns the approximate number of
+  //     bytes of memory in use by the DB.
   virtual bool GetProperty(const Slice& property, std::string* value) = 0;
 
   // For each i in [0,n-1], store in "sizes[i]", the approximate