feat: add batcher queue len and queue size in bytes metrics (#1593)

Co-authored-by: Julian Ventura <julian.ventura@lambdaclass.com>

Author: JulianVentura

batcher/aligned-batcher/src/lib.rs

@@ -16,6 +16,7 @@ use tokio::time::{timeout, Instant};
 use types::batch_state::BatchState;
 use types::user_state::UserState;
 
+use batch_queue::calculate_batch_size;
 use std::collections::HashMap;
 use std::env;
 use std::net::SocketAddr;
@@ -1043,10 +1044,13 @@ impl Batcher {
             BatchQueueEntryPriority::new(max_fee, nonce),
         );
 
-        info!(
-            "Current batch queue length: {}",
-            batch_state_lock.batch_queue.len()
-        );
+        // Update metrics
+        let queue_len = batch_state_lock.batch_queue.len();
+        let queue_size_bytes = calculate_batch_size(&batch_state_lock.batch_queue)?;
+        self.metrics
+            .update_queue_metrics(queue_len as i64, queue_size_bytes as i64);
+
+        info!("Current batch queue length: {}", queue_len);
 
         let mut proof_submitter_addr = proof_submitter_addr;
 
@@ -1226,6 +1230,13 @@ impl Batcher {
                 ))?;
         }
 
+        // Update metrics
+        let queue_len = batch_state_lock.batch_queue.len();
+        let queue_size_bytes = calculate_batch_size(&batch_state_lock.batch_queue)?;
+
+        self.metrics
+            .update_queue_metrics(queue_len as i64, queue_size_bytes as i64);
+
         Ok(())
     }
 
@@ -1373,6 +1384,8 @@ impl Batcher {
         batch_state_lock
             .user_states
             .insert(nonpaying_replacement_addr, nonpaying_user_state);
+
+        self.metrics.update_queue_metrics(0, 0);
     }
 
     /// Receives new block numbers, checks if conditions are met for submission and

batcher/aligned-batcher/src/metrics.rs

@@ -20,6 +20,8 @@ pub struct BatcherMetrics {
     pub batcher_started: IntCounter,
     pub gas_price_used_on_latest_batch: IntGauge,
     pub broken_ws_connections: IntCounter,
+    pub queue_len: IntGauge,
+    pub queue_size_bytes: IntGauge,
     pub s3_duration: IntGauge,
     pub create_new_task_duration: IntGauge,
     pub cancel_create_new_task_duration: IntGauge,
@@ -52,6 +54,11 @@ impl BatcherMetrics {
             "broken_ws_connections_count",
             "Broken websocket connections"
         ))?;
+        let queue_len = register_int_gauge!(opts!("queue_len", "Amount of proofs in the queue"))?;
+        let queue_size_bytes = register_int_gauge!(opts!(
+            "queue_size_bytes",
+            "Accumulated size in bytes of all proofs in the queue"
+        ))?;
         let s3_duration = register_int_gauge!(opts!("s3_duration", "S3 Duration"))?;
         let create_new_task_duration = register_int_gauge!(opts!(
             "create_new_task_duration",
@@ -82,6 +89,8 @@ impl BatcherMetrics {
         registry.register(Box::new(gas_price_used_on_latest_batch.clone()))?;
         registry.register(Box::new(batcher_started.clone()))?;
         registry.register(Box::new(broken_ws_connections.clone()))?;
+        registry.register(Box::new(queue_len.clone()))?;
+        registry.register(Box::new(queue_size_bytes.clone()))?;
         registry.register(Box::new(s3_duration.clone()))?;
         registry.register(Box::new(create_new_task_duration.clone()))?;
         registry.register(Box::new(cancel_create_new_task_duration.clone()))?;
@@ -108,6 +117,8 @@ impl BatcherMetrics {
             batcher_started,
             gas_price_used_on_latest_batch,
             broken_ws_connections,
+            queue_len,
+            queue_size_bytes,
             s3_duration,
             create_new_task_duration,
             cancel_create_new_task_duration,
@@ -142,4 +153,9 @@ impl BatcherMetrics {
     pub fn user_error(&self, label_values: &[&str]) {
         self.user_errors.with_label_values(label_values).inc();
     }
+
+    pub fn update_queue_metrics(&self, queue_len: i64, queue_size: i64) {
+        self.queue_len.set(queue_len);
+        self.queue_size_bytes.set(queue_size);
+    }
 }