fix pending batches 404

README.md

@@ -21,7 +21,7 @@ The following questions will be answered by the following resources:
 
 ## Policies
 
-- [Security policy](.github/SECURITY.md)
+- [Security policy](SECURITY.md)
 - [Contribution policy](CONTRIBUTING.md)
 
 ## License

core/bin/external_node/src/config/mod.rs

@@ -191,6 +191,11 @@ pub struct OptionalENConfig {
     #[serde(default = "OptionalENConfig::default_merkle_tree_block_cache_size_mb")]
     merkle_tree_block_cache_size_mb: usize,
 
+    /// Byte capacity of memtables (recent, non-persisted changes to RocksDB). Setting this to a reasonably
+    /// large value (order of 512 MiB) is helpful for large DBs that experience write stalls.
+    #[serde(default = "OptionalENConfig::default_merkle_tree_memtable_capacity_mb")]
+    merkle_tree_memtable_capacity_mb: usize,
+
     // Other config settings
     /// Port on which the Prometheus exporter server is listening.
     pub prometheus_port: Option<u16>,
@@ -274,6 +279,10 @@ impl OptionalENConfig {
         128
     }
 
+    const fn default_merkle_tree_memtable_capacity_mb() -> usize {
+        256
+    }
+
     const fn default_fee_history_limit() -> u64 {
         1_024
     }
@@ -318,6 +327,11 @@ impl OptionalENConfig {
         self.merkle_tree_block_cache_size_mb * BYTES_IN_MEGABYTE
     }
 
+    /// Returns the memtable capacity for Merkle tree in bytes.
+    pub fn merkle_tree_memtable_capacity(&self) -> usize {
+        self.merkle_tree_memtable_capacity_mb * BYTES_IN_MEGABYTE
+    }
+
     pub fn api_namespaces(&self) -> Vec<Namespace> {
         self.api_namespaces
             .clone()