feature: add Blob pool metrics (#6373)

Signed-off-by: jsvisa <delweng@gmail.com>

crates/transaction-pool/src/metrics.rs

@@ -31,6 +31,11 @@ pub struct TxPoolMetrics {
     /// Total amount of memory used by the transactions in the queued sub-pool in bytes
     pub(crate) queued_pool_size_bytes: Gauge,
 
+    /// Number of transactions in the blob sub-pool
+    pub(crate) blob_pool_transactions: Gauge,
+    /// Total amount of memory used by the transactions in the blob sub-pool in bytes
+    pub(crate) blob_pool_size_bytes: Gauge,
+
     /// Number of all transactions of all sub-pools: pending + basefee + queued
     pub(crate) total_transactions: Gauge,
 

crates/transaction-pool/src/pool/txpool.rs

@@ -463,6 +463,8 @@ impl<T: TransactionOrdering> TxPool<T> {
         self.metrics.basefee_pool_size_bytes.set(stats.basefee_size as f64);
         self.metrics.queued_pool_transactions.set(stats.queued as f64);
         self.metrics.queued_pool_size_bytes.set(stats.queued_size as f64);
+        self.metrics.blob_pool_transactions.set(stats.blob as f64);
+        self.metrics.blob_pool_size_bytes.set(stats.blob_size as f64);
         self.metrics.total_transactions.set(stats.total as f64);
     }
 

docs/design/metrics.md

@@ -15,7 +15,8 @@ The main difference between metrics and traces is therefore that metrics are sys
 
 ### How to add a metric
 
-To add metrics use the [`metrics`][metrics] crate. 
+To add metrics use the [`metrics`][metrics] crate.
+
 1. Add the code emitting the metric.
 2. Add the metrics description in the crate's metrics describer module, e.g.: [stages metrics describer](https://github.com/paradigmxyz/reth/blob/main/crates/stages/src/metrics.rs).
 3. Document the metric in this file.
@@ -83,6 +84,8 @@ This list may be non-exhaustive.
 - `transaction_pool.basefee_pool_size_bytes`: Total amount of memory used by the transactions in the basefee sub-pool in bytes
 - `transaction_pool.queued_pool_transactions`: Number of transactions in the queued sub-pool
 - `transaction_pool.queued_pool_size_bytes`: Total amount of memory used by the transactions in the queued sub-pool in bytes
+- `transaction_pool.blob_pool_transactions`: Number of transactions in the blob sub-pool
+- `transaction_pool.blob_pool_size_bytes`: Total amount of memory used by the transactions in the blob sub-pool in bytes
 
 #### Component: Network
 

etc/grafana/dashboards/overview.json

@@ -3499,6 +3499,17 @@
           "legendFormat": "Queued pool size",
           "range": true,
           "refId": "C"
+        },
+	{
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "builder",
+          "expr": "reth_transaction_pool_blob_pool_size_bytes{instance=~\"$instance\"}",
+          "legendFormat": "Blob pool size",
+          "range": true,
+          "refId": "D"
         }
       ],
       "title": "Subpool sizes in bytes",
@@ -3616,6 +3627,17 @@
           "legendFormat": "Queued pool transactions",
           "range": true,
           "refId": "C"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "editorMode": "builder",
+          "expr": "reth_transaction_pool_blob_pool_transactions{instance=~\"$instance\"}",
+          "legendFormat": "Blob pool transactions",
+          "range": true,
+          "refId": "D"
         }
       ],
       "title": "Subpool transaction count",