diff --git a/node/cli-opt/src/lib.rs b/node/cli-opt/src/lib.rs
index 6330d53f51..ac82ca7d29 100644
--- a/node/cli-opt/src/lib.rs
+++ b/node/cli-opt/src/lib.rs
@@ -74,5 +74,6 @@ pub struct RpcConfig {
 	pub ethapi_max_permits: u32,
 	pub ethapi_trace_max_count: u32,
 	pub ethapi_trace_cache_duration: u64,
+	pub eth_log_block_cache: usize,
 	pub max_past_logs: u32,
 }
diff --git a/node/cli/src/cli.rs b/node/cli/src/cli.rs
index 9d00244cb7..1bfa45308a 100644
--- a/node/cli/src/cli.rs
+++ b/node/cli/src/cli.rs
@@ -169,6 +169,10 @@ pub struct RunCmd {
 	#[structopt(long, default_value = "300")]
 	pub ethapi_trace_cache_duration: u64,
 
+	/// Size of the LRU cache for block data and their transaction statuses.
+	#[structopt(long, default_value = "3000")]
+	pub eth_log_block_cache: usize,
+
 	/// Maximum number of logs in a query.
 	#[structopt(long, default_value = "10000")]
 	pub max_past_logs: u32,
diff --git a/node/cli/src/command.rs b/node/cli/src/command.rs
index 4ce00b4297..2fb1f661f0 100644
--- a/node/cli/src/command.rs
+++ b/node/cli/src/command.rs
@@ -550,6 +550,7 @@ pub fn run() -> Result<()> {
 					ethapi_max_permits: cli.run.ethapi_max_permits,
 					ethapi_trace_max_count: cli.run.ethapi_trace_max_count,
 					ethapi_trace_cache_duration: cli.run.ethapi_trace_cache_duration,
+					eth_log_block_cache: cli.run.eth_log_block_cache,
 					max_past_logs: cli.run.max_past_logs,
 				};
 
diff --git a/node/service/src/lib.rs b/node/service/src/lib.rs
index 602bc4c479..a9f00ecbde 100644
--- a/node/service/src/lib.rs
+++ b/node/service/src/lib.rs
@@ -523,18 +523,19 @@ where
 			};
 
 			let deps = rpc::FullDeps {
+				backend: backend.clone(),
 				client: client.clone(),
-				pool: pool.clone(),
-				graph: pool.pool().clone(),
+				command_sink: None,
 				deny_unsafe,
-				is_authority: collator,
-				network: network.clone(),
-				filter_pool: filter_pool.clone(),
 				ethapi_cmd: ethapi_cmd.clone(),
-				command_sink: None,
+				eth_log_block_cache: rpc_config.eth_log_block_cache,
+				filter_pool: filter_pool.clone(),
 				frontier_backend: frontier_backend.clone(),
-				backend: backend.clone(),
+				graph: pool.pool().clone(),
+				pool: pool.clone(),
+				is_authority: collator,
 				max_past_logs,
+				network: network.clone(),
 				transaction_converter,
 			};
 			#[allow(unused_mut)]
@@ -868,18 +869,19 @@ where
 			};
 
 			let deps = rpc::FullDeps {
+				backend: backend.clone(),
 				client: client.clone(),
-				pool: pool.clone(),
-				graph: pool.pool().clone(),
+				command_sink: command_sink.clone(),
 				deny_unsafe,
-				is_authority: collator,
-				network: network.clone(),
-				filter_pool: filter_pool.clone(),
 				ethapi_cmd: ethapi_cmd.clone(),
-				command_sink: command_sink.clone(),
+				eth_log_block_cache: rpc_config.eth_log_block_cache,
+				filter_pool: filter_pool.clone(),
 				frontier_backend: frontier_backend.clone(),
-				backend: backend.clone(),
+				graph: pool.pool().clone(),
+				pool: pool.clone(),
+				is_authority: collator,
 				max_past_logs,
+				network: network.clone(),
 				transaction_converter,
 			};
 			#[allow(unused_mut)]
diff --git a/node/service/src/rpc.rs b/node/service/src/rpc.rs
index 61e8b1265c..ffd6884aa4 100644
--- a/node/service/src/rpc.rs
+++ b/node/service/src/rpc.rs
@@ -77,6 +77,8 @@ pub struct FullDeps<C, P, A: ChainApi, BE> {
 	pub filter_pool: Option<FilterPool>,
 	/// The list of optional RPC extensions.
 	pub ethapi_cmd: Vec<EthApiCmd>,
+	/// Size of the LRU cache for block data and their transaction statuses.
+	pub eth_log_block_cache: usize,
 	/// Frontier Backend.
 	pub frontier_backend: Arc<fc_db::Backend<Block>>,
 	/// Backend.
@@ -115,6 +117,7 @@ where
 		network,
 		filter_pool,
 		ethapi_cmd,
+		eth_log_block_cache,
 		command_sink,
 		frontier_backend,
 		backend: _,
@@ -133,7 +136,10 @@ where
 	// TODO: are we supporting signing?
 	let signers = Vec::new();
 
-	let block_data_cache = Arc::new(EthBlockDataCache::new(3000, 3000));
+	let block_data_cache = Arc::new(EthBlockDataCache::new(
+		eth_log_block_cache,
+		eth_log_block_cache,
+	));
 
 	let mut overrides_map = BTreeMap::new();
 	overrides_map.insert(