6 files changed, 67 insertions, 21 deletions

diff --git a/src/table/data.rs b/src/table/data.rs
index 3212e82b..93da2110 100644
--- a/src/table/data.rs
+++ b/src/table/data.rs
@@ -58,7 +58,13 @@ where
 			.expect("Unable to open DB tree");
 		let gc_todo = CountedTree::new(gc_todo).expect("Cannot count gc_todo_v2");
 
-		let metrics = TableMetrics::new(F::TABLE_NAME, merkle_todo.clone(), gc_todo.clone());
+		let metrics = TableMetrics::new(
+			F::TABLE_NAME,
+			store.clone(),
+			merkle_tree.clone(),
+			merkle_todo.clone(),
+			gc_todo.clone(),
+		);
 
 		Arc::new(Self {
 			system,
diff --git a/src/table/gc.rs b/src/table/gc.rs
index 83e7eeff..cfdc9d2d 100644
--- a/src/table/gc.rs
+++ b/src/table/gc.rs
@@ -330,12 +330,10 @@ where
 		format!("{} GC", F::TABLE_NAME)
 	}
 
-	fn info(&self) -> Option<String> {
-		let l = self.gc.data.gc_todo_len().unwrap_or(0);
-		if l > 0 {
-			Some(format!("{} items in queue", l))
-		} else {
-			None
+	fn status(&self) -> WorkerStatus {
+		WorkerStatus {
+			queue_length: Some(self.gc.data.gc_todo_len().unwrap_or(0) as u64),
+			..Default::default()
 		}
 	}
 
diff --git a/src/table/merkle.rs b/src/table/merkle.rs
index a5c29723..e977bfb5 100644
--- a/src/table/merkle.rs
+++ b/src/table/merkle.rs
@@ -293,6 +293,10 @@ where
 		Ok(self.data.merkle_tree.len()?)
 	}
 
+	pub fn merkle_tree_fast_len(&self) -> Result<Option<usize>, Error> {
+		Ok(self.data.merkle_tree.fast_len()?)
+	}
+
 	pub fn todo_len(&self) -> Result<usize, Error> {
 		Ok(self.data.merkle_todo.len()?)
 	}
@@ -310,15 +314,13 @@ where
 	R: TableReplication + 'static,
 {
 	fn name(&self) -> String {
-		format!("{} Merkle tree updater", F::TABLE_NAME)
+		format!("{} Merkle", F::TABLE_NAME)
 	}
 
-	fn info(&self) -> Option<String> {
-		let l = self.0.todo_len().unwrap_or(0);
-		if l > 0 {
-			Some(format!("{} items in queue", l))
-		} else {
-			None
+	fn status(&self) -> WorkerStatus {
+		WorkerStatus {
+			queue_length: Some(self.0.todo_len().unwrap_or(0) as u64),
+			..Default::default()
 		}
 	}
 
diff --git a/src/table/metrics.rs b/src/table/metrics.rs
index 3a1783e0..8318a84f 100644
--- a/src/table/metrics.rs
+++ b/src/table/metrics.rs
@@ -5,6 +5,8 @@ use garage_db::counted_tree_hack::CountedTree;
 
 /// TableMetrics reference all counter used for metrics
 pub struct TableMetrics {
+	pub(crate) _table_size: ValueObserver<u64>,
+	pub(crate) _merkle_tree_size: ValueObserver<u64>,
 	pub(crate) _merkle_todo_len: ValueObserver<u64>,
 	pub(crate) _gc_todo_len: ValueObserver<u64>,
 
@@ -20,9 +22,43 @@ pub struct TableMetrics {
 	pub(crate) sync_items_received: Counter<u64>,
 }
 impl TableMetrics {
-	pub fn new(table_name: &'static str, merkle_todo: db::Tree, gc_todo: CountedTree) -> Self {
+	pub fn new(
+		table_name: &'static str,
+		store: db::Tree,
+		merkle_tree: db::Tree,
+		merkle_todo: db::Tree,
+		gc_todo: CountedTree,
+	) -> Self {
 		let meter = global::meter(table_name);
 		TableMetrics {
+			_table_size: meter
+				.u64_value_observer(
+					"table.size",
+					move |observer| {
+						if let Ok(Some(v)) = store.fast_len() {
+							observer.observe(
+								v as u64,
+								&[KeyValue::new("table_name", table_name)],
+							);
+						}
+					},
+				)
+				.with_description("Number of items in table")
+				.init(),
+			_merkle_tree_size: meter
+				.u64_value_observer(
+					"table.merkle_tree_size",
+					move |observer| {
+						if let Ok(Some(v)) = merkle_tree.fast_len() {
+							observer.observe(
+								v as u64,
+								&[KeyValue::new("table_name", table_name)],
+							);
+						}
+					},
+				)
+				.with_description("Number of nodes in table's Merkle tree")
+				.init(),
 			_merkle_todo_len: meter
 				.u64_value_observer(
 					"table.merkle_updater_todo_queue_length",
diff --git a/src/table/sync.rs b/src/table/sync.rs
index 9d79d856..af7aa640 100644
--- a/src/table/sync.rs
+++ b/src/table/sync.rs
@@ -570,12 +570,10 @@ impl<F: TableSchema + 'static, R: TableReplication + 'static> Worker for SyncWor
 		format!("{} sync", F::TABLE_NAME)
 	}
 
-	fn info(&self) -> Option<String> {
-		let l = self.todo.len();
-		if l > 0 {
-			Some(format!("{} partitions remaining", l))
-		} else {
-			None
+	fn status(&self) -> WorkerStatus {
+		WorkerStatus {
+			queue_length: Some(self.todo.len() as u64),
+			..Default::default()
 		}
 	}
 
diff --git a/src/table/util.rs b/src/table/util.rs
index 20595a94..0b10cf3f 100644
--- a/src/table/util.rs
+++ b/src/table/util.rs
@@ -49,3 +49,9 @@ impl EnumerationOrder {
 		}
 	}
 }
+
+impl Default for EnumerationOrder {
+	fn default() -> Self {
+		EnumerationOrder::Forward
+	}
+}