diff --git a/core/benches/retransmit_stage.rs b/core/benches/retransmit_stage.rs
index 9a0272124..0c0f3a3b8 100644
--- a/core/benches/retransmit_stage.rs
+++ b/core/benches/retransmit_stage.rs
@@ -6,6 +6,7 @@ extern crate test;
 use log::*;
 use solana_core::cluster_info::{ClusterInfo, Node};
 use solana_core::contact_info::ContactInfo;
+use solana_core::max_slots::MaxSlots;
 use solana_core::retransmit_stage::retransmitter;
 use solana_ledger::entry::Entry;
 use solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo};
@@ -92,6 +93,7 @@ fn bench_retransmitter(bencher: &mut Bencher) {
         &leader_schedule_cache,
         cluster_info,
         packet_receiver,
+        &Arc::new(MaxSlots::default()),
     );
 
     let mut index = 0;
diff --git a/core/src/completed_data_sets_service.rs b/core/src/completed_data_sets_service.rs
index 9c559fb1e..4fc954482 100644
--- a/core/src/completed_data_sets_service.rs
+++ b/core/src/completed_data_sets_service.rs
@@ -1,4 +1,4 @@
-use crate::rpc_subscriptions::RpcSubscriptions;
+use crate::{max_slots::MaxSlots, rpc_subscriptions::RpcSubscriptions};
 use crossbeam_channel::{Receiver, RecvTimeoutError, Sender};
 use solana_ledger::blockstore::{Blockstore, CompletedDataSetInfo};
 use solana_ledger::entry::Entry;
@@ -25,6 +25,7 @@ impl CompletedDataSetsService {
         blockstore: Arc<Blockstore>,
         rpc_subscriptions: Arc<RpcSubscriptions>,
         exit: &Arc<AtomicBool>,
+        max_slots: Arc<MaxSlots>,
     ) -> Self {
         let exit = exit.clone();
         let thread_hdl = Builder::new()
@@ -37,6 +38,7 @@ impl CompletedDataSetsService {
                     &completed_sets_receiver,
                     &blockstore,
                     &rpc_subscriptions,
+                    &max_slots,
                 ) {
                     break;
                 }
@@ -49,8 +51,10 @@ impl CompletedDataSetsService {
         completed_sets_receiver: &CompletedDataSetsReceiver,
         blockstore: &Blockstore,
         rpc_subscriptions: &RpcSubscriptions,
+        max_slots: &Arc<MaxSlots>,
     ) -> Result<(), RecvTimeoutError> {
         let completed_data_sets = completed_sets_receiver.recv_timeout(Duration::from_secs(1))?;
+        let mut max_slot = 0;
         for completed_set_info in std::iter::once(completed_data_sets)
             .chain(completed_sets_receiver.try_iter())
             .flatten()
@@ -60,6 +64,7 @@ impl CompletedDataSetsService {
                 start_index,
                 end_index,
             } = completed_set_info;
+            max_slot = max_slot.max(slot);
             match blockstore.get_entries_in_data_block(slot, start_index, end_index, None) {
                 Ok(entries) => {
                     let transactions = Self::get_transaction_signatures(entries);
@@ -70,6 +75,9 @@ impl CompletedDataSetsService {
                 Err(e) => warn!("completed-data-set-service deserialize error: {:?}", e),
             }
         }
+        max_slots
+            .shred_insert
+            .fetch_max(max_slot, Ordering::Relaxed);
 
         Ok(())
     }
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 822e7130b..59b987c4d 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -16,6 +16,7 @@ pub mod cluster_info_vote_listener;
 pub mod commitment_service;
 pub mod completed_data_sets_service;
 mod deprecated;
+pub mod max_slots;
 pub mod sample_performance_service;
 pub mod shred_fetch_stage;
 #[macro_use]
diff --git a/core/src/max_slots.rs b/core/src/max_slots.rs
new file mode 100644
index 000000000..3dc12f07d
--- /dev/null
+++ b/core/src/max_slots.rs
@@ -0,0 +1,7 @@
+use std::sync::atomic::AtomicU64;
+
+#[derive(Default)]
+pub struct MaxSlots {
+    pub retransmit: AtomicU64,
+    pub shred_insert: AtomicU64,
+}
diff --git a/core/src/retransmit_stage.rs b/core/src/retransmit_stage.rs
index fc19084c0..d517e53a9 100644
--- a/core/src/retransmit_stage.rs
+++ b/core/src/retransmit_stage.rs
@@ -8,6 +8,7 @@ use crate::{
     cluster_slots_service::ClusterSlotsService,
     completed_data_sets_service::CompletedDataSetsSender,
     contact_info::ContactInfo,
+    max_slots::MaxSlots,
     repair_service::DuplicateSlotsResetSender,
     repair_service::RepairInfo,
     result::{Error, Result},
@@ -264,6 +265,7 @@ fn retransmit(
     epoch_stakes_cache: &RwLock<EpochStakesCache>,
     last_peer_update: &AtomicU64,
     shreds_received: &Mutex<ShredFilterAndHasher>,
+    max_slots: &MaxSlots,
 ) -> Result<()> {
     let timer = Duration::new(1, 0);
     let r_lock = r.lock().unwrap();
@@ -320,6 +322,7 @@ fn retransmit(
     let mut compute_turbine_peers_total = 0;
     let mut packets_by_slot: HashMap<Slot, usize> = HashMap::new();
     let mut packets_by_source: HashMap<String, usize> = HashMap::new();
+    let mut max_slot = 0;
     for mut packets in packet_v {
         for packet in packets.packets.iter_mut() {
             // skip discarded packets and repair packets
@@ -337,6 +340,7 @@ fn retransmit(
                 Some(slot) => slot,
                 None => continue,
             };
+            max_slot = max_slot.max(shred_slot);
             let mut compute_turbine_peers = Measure::start("turbine_start");
             let (my_index, mut shuffled_stakes_and_index) = ClusterInfo::shuffle_peers_and_index(
                 &my_id,
@@ -393,6 +397,7 @@ fn retransmit(
             retransmit_total += retransmit_time.as_us();
         }
     }
+    max_slots.retransmit.fetch_max(max_slot, Ordering::Relaxed);
     timer_start.stop();
     debug!(
         "retransmitted {} packets in {}ms retransmit_time: {}ms id: {}",
@@ -433,6 +438,7 @@ pub fn retransmitter(
     leader_schedule_cache: &Arc<LeaderScheduleCache>,
     cluster_info: Arc<ClusterInfo>,
     r: Arc<Mutex<PacketReceiver>>,
+    max_slots: &Arc<MaxSlots>,
 ) -> Vec<JoinHandle<()>> {
     let stats = Arc::new(RetransmitStats::default());
     let shreds_received = Arc::new(Mutex::new((
@@ -450,6 +456,7 @@ pub fn retransmitter(
             let epoch_stakes_cache = Arc::new(RwLock::new(EpochStakesCache::default()));
             let last_peer_update = Arc::new(AtomicU64::new(0));
             let shreds_received = shreds_received.clone();
+            let max_slots = max_slots.clone();
 
             Builder::new()
                 .name("solana-retransmitter".to_string())
@@ -467,6 +474,7 @@ pub fn retransmitter(
                             &epoch_stakes_cache,
                             &last_peer_update,
                             &shreds_received,
+                            &max_slots,
                         ) {
                             match e {
                                 Error::RecvTimeoutError(RecvTimeoutError::Disconnected) => break,
@@ -511,6 +519,7 @@ impl RetransmitStage {
         verified_vote_receiver: VerifiedVoteReceiver,
         repair_validators: Option<HashSet<Pubkey>>,
         completed_data_sets_sender: CompletedDataSetsSender,
+        max_slots: &Arc<MaxSlots>,
     ) -> Self {
         let (retransmit_sender, retransmit_receiver) = channel();
 
@@ -521,6 +530,7 @@ impl RetransmitStage {
             leader_schedule_cache,
             cluster_info.clone(),
             retransmit_receiver,
+            max_slots,
         );
 
         let leader_schedule_cache_clone = leader_schedule_cache.clone();
@@ -638,6 +648,7 @@ mod tests {
             &leader_schedule_cache,
             cluster_info,
             Arc::new(Mutex::new(retransmit_receiver)),
+            &Arc::new(MaxSlots::default()),
         );
         let _thread_hdls = vec![t_retransmit];
 
diff --git a/core/src/rpc.rs b/core/src/rpc.rs
index 684ad6b8b..1a47dd0e3 100644
--- a/core/src/rpc.rs
+++ b/core/src/rpc.rs
@@ -3,6 +3,7 @@
 use crate::{
     cluster_info::ClusterInfo,
     contact_info::ContactInfo,
+    max_slots::MaxSlots,
     non_circulating_supply::calculate_non_circulating_supply,
     optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank,
     rpc_health::*,
@@ -138,6 +139,7 @@ pub struct JsonRpcRequestProcessor {
     bigtable_ledger_storage: Option<solana_storage_bigtable::LedgerStorage>,
     optimistically_confirmed_bank: Arc<RwLock<OptimisticallyConfirmedBank>>,
     largest_accounts_cache: Arc<RwLock<LargestAccountsCache>>,
+    max_slots: Arc<MaxSlots>,
 }
 impl Metadata for JsonRpcRequestProcessor {}
 
@@ -221,6 +223,7 @@ impl JsonRpcRequestProcessor {
         bigtable_ledger_storage: Option<solana_storage_bigtable::LedgerStorage>,
         optimistically_confirmed_bank: Arc<RwLock<OptimisticallyConfirmedBank>>,
         largest_accounts_cache: Arc<RwLock<LargestAccountsCache>>,
+        max_slots: Arc<MaxSlots>,
     ) -> (Self, Receiver<TransactionInfo>) {
         let (sender, receiver) = channel();
         (
@@ -239,6 +242,7 @@ impl JsonRpcRequestProcessor {
                 bigtable_ledger_storage,
                 optimistically_confirmed_bank,
                 largest_accounts_cache,
+                max_slots,
             },
             receiver,
         )
@@ -279,6 +283,7 @@ impl JsonRpcRequestProcessor {
                 bank: bank.clone(),
             })),
             largest_accounts_cache: Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            max_slots: Arc::new(MaxSlots::default()),
         }
     }
 
@@ -485,6 +490,14 @@ impl JsonRpcRequestProcessor {
         self.bank(commitment).slot()
     }
 
+    fn get_max_retransmit_slot(&self) -> Slot {
+        self.max_slots.retransmit.load(Ordering::Relaxed)
+    }
+
+    fn get_max_shred_insert_slot(&self) -> Slot {
+        self.max_slots.shred_insert.load(Ordering::Relaxed)
+    }
+
     fn get_slot_leader(&self, commitment: Option<CommitmentConfig>) -> String {
         self.bank(commitment).collector_id().to_string()
     }
@@ -1915,6 +1928,12 @@ pub trait RpcSol {
     #[rpc(meta, name = "getSlot")]
     fn get_slot(&self, meta: Self::Metadata, commitment: Option<CommitmentConfig>) -> Result<Slot>;
 
+    #[rpc(meta, name = "getMaxRetransmitSlot")]
+    fn get_max_retransmit_slot(&self, meta: Self::Metadata) -> Result<Slot>;
+
+    #[rpc(meta, name = "getMaxShredInsertSlot")]
+    fn get_max_shred_insert_slot(&self, meta: Self::Metadata) -> Result<Slot>;
+
     #[rpc(meta, name = "getTransactionCount")]
     fn get_transaction_count(
         &self,
@@ -2505,6 +2524,16 @@ impl RpcSol for RpcSolImpl {
         Ok(meta.get_slot(commitment))
     }
 
+    fn get_max_retransmit_slot(&self, meta: Self::Metadata) -> Result<Slot> {
+        debug!("get_max_retransmit_slot rpc request received");
+        Ok(meta.get_max_retransmit_slot())
+    }
+
+    fn get_max_shred_insert_slot(&self, meta: Self::Metadata) -> Result<Slot> {
+        debug!("get_max_shred_insert_slot rpc request received");
+        Ok(meta.get_max_shred_insert_slot())
+    }
+
     fn get_transaction_count(
         &self,
         meta: Self::Metadata,
@@ -3206,6 +3235,10 @@ pub mod tests {
             .write_perf_sample(0, &sample1)
             .expect("write to blockstore");
 
+        let max_slots = Arc::new(MaxSlots::default());
+        max_slots.retransmit.store(42, Ordering::Relaxed);
+        max_slots.shred_insert.store(43, Ordering::Relaxed);
+
         let (meta, receiver) = JsonRpcRequestProcessor::new(
             JsonRpcConfig {
                 enable_rpc_transaction_history: true,
@@ -3224,6 +3257,7 @@ pub mod tests {
             None,
             OptimisticallyConfirmedBank::locked_from_bank_forks_root(&bank_forks),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            max_slots,
         );
         SendTransactionService::new(tpu_address, &bank_forks, None, receiver, 1000, 1);
 
@@ -4634,6 +4668,7 @@ pub mod tests {
             None,
             OptimisticallyConfirmedBank::locked_from_bank_forks_root(&bank_forks),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            Arc::new(MaxSlots::default()),
         );
         SendTransactionService::new(tpu_address, &bank_forks, None, receiver, 1000, 1);
 
@@ -4831,6 +4866,7 @@ pub mod tests {
             None,
             OptimisticallyConfirmedBank::locked_from_bank_forks_root(&bank_forks),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            Arc::new(MaxSlots::default()),
         );
         SendTransactionService::new(tpu_address, &bank_forks, None, receiver, 1000, 1);
         assert_eq!(request_processor.validator_exit(), false);
@@ -4865,6 +4901,7 @@ pub mod tests {
             None,
             OptimisticallyConfirmedBank::locked_from_bank_forks_root(&bank_forks),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            Arc::new(MaxSlots::default()),
         );
         SendTransactionService::new(tpu_address, &bank_forks, None, receiver, 1000, 1);
         assert_eq!(request_processor.validator_exit(), true);
@@ -4892,6 +4929,24 @@ pub mod tests {
         assert_eq!(expected, result);
     }
 
+    fn test_basic_slot(method: &str, expected: Slot) {
+        let bob_pubkey = solana_sdk::pubkey::new_rand();
+        let RpcHandler { io, meta, .. } = start_rpc_handler_with_tx(&bob_pubkey);
+
+        let req = format!("{{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"{}\"}}", method);
+        let res = io.handle_request_sync(&req, meta);
+
+        let json: Value = serde_json::from_str(&res.unwrap()).unwrap();
+        let slot: Slot = serde_json::from_value(json["result"].clone()).unwrap();
+        assert_eq!(slot, expected);
+    }
+
+    #[test]
+    fn test_rpc_get_max_slots() {
+        test_basic_slot("getMaxRetransmitSlot", 42);
+        test_basic_slot("getMaxShredInsertSlot", 43);
+    }
+
     #[test]
     fn test_rpc_get_version() {
         let bob_pubkey = solana_sdk::pubkey::new_rand();
@@ -4958,6 +5013,7 @@ pub mod tests {
             None,
             OptimisticallyConfirmedBank::locked_from_bank_forks_root(&bank_forks),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            Arc::new(MaxSlots::default()),
         );
         SendTransactionService::new(tpu_address, &bank_forks, None, receiver, 1000, 1);
         assert_eq!(
@@ -6188,6 +6244,7 @@ pub mod tests {
             None,
             optimistically_confirmed_bank.clone(),
             Arc::new(RwLock::new(LargestAccountsCache::new(30))),
+            Arc::new(MaxSlots::default()),
         );
 
         let mut io = MetaIoHandler::default();
diff --git a/core/src/rpc_service.rs b/core/src/rpc_service.rs
index 40d388e22..0b20a013e 100644
--- a/core/src/rpc_service.rs
+++ b/core/src/rpc_service.rs
@@ -3,6 +3,7 @@
 use crate::{
     bigtable_upload_service::BigTableUploadService,
     cluster_info::ClusterInfo,
+    max_slots::MaxSlots,
     optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank,
     poh_recorder::PohRecorder,
     rpc::*,
@@ -272,6 +273,7 @@ impl JsonRpcService {
         optimistically_confirmed_bank: Arc<RwLock<OptimisticallyConfirmedBank>>,
         send_transaction_retry_ms: u64,
         send_transaction_leader_forward_count: u64,
+        max_slots: Arc<MaxSlots>,
     ) -> Self {
         info!("rpc bound to {:?}", rpc_addr);
         info!("rpc configuration: {:?}", config);
@@ -349,6 +351,7 @@ impl JsonRpcService {
             bigtable_ledger_storage,
             optimistically_confirmed_bank,
             largest_accounts_cache,
+            max_slots,
         );
 
         let leader_info =
@@ -510,6 +513,7 @@ mod tests {
             optimistically_confirmed_bank,
             1000,
             1,
+            Arc::new(MaxSlots::default()),
         );
         let thread = rpc_service.thread_hdl.thread();
         assert_eq!(thread.name().unwrap(), "solana-jsonrpc");
diff --git a/core/src/tvu.rs b/core/src/tvu.rs
index 8d4e1c2a7..e2f41a06d 100644
--- a/core/src/tvu.rs
+++ b/core/src/tvu.rs
@@ -11,6 +11,7 @@ use crate::{
     completed_data_sets_service::CompletedDataSetsSender,
     consensus::Tower,
     ledger_cleanup_service::LedgerCleanupService,
+    max_slots::MaxSlots,
     optimistically_confirmed_bank_tracker::BankNotificationSender,
     poh_recorder::PohRecorder,
     replay_stage::{ReplayStage, ReplayStageConfig},
@@ -120,6 +121,7 @@ impl Tvu {
         completed_data_sets_sender: CompletedDataSetsSender,
         bank_notification_sender: Option<BankNotificationSender>,
         tvu_config: TvuConfig,
+        max_slots: &Arc<MaxSlots>,
     ) -> Self {
         let keypair: Arc<Keypair> = cluster_info.keypair.clone();
 
@@ -174,6 +176,7 @@ impl Tvu {
             verified_vote_receiver,
             tvu_config.repair_validators,
             completed_data_sets_sender,
+            max_slots,
         );
 
         let (ledger_cleanup_slot_sender, ledger_cleanup_slot_receiver) = channel();
@@ -407,6 +410,7 @@ pub mod tests {
             completed_data_sets_sender,
             None,
             TvuConfig::default(),
+            &Arc::new(MaxSlots::default()),
         );
         exit.store(true, Ordering::Relaxed);
         tvu.join().unwrap();
diff --git a/core/src/validator.rs b/core/src/validator.rs
index 71e604277..0c569b766 100644
--- a/core/src/validator.rs
+++ b/core/src/validator.rs
@@ -12,6 +12,7 @@ use crate::{
     consensus::{reconcile_blockstore_roots_with_tower, Tower},
     contact_info::ContactInfo,
     gossip_service::GossipService,
+    max_slots::MaxSlots,
     optimistically_confirmed_bank_tracker::{
         OptimisticallyConfirmedBank, OptimisticallyConfirmedBankTracker,
     },
@@ -414,6 +415,7 @@ impl Validator {
             config.pubsub_config.enable_vote_subscription,
         ));
 
+        let max_slots = Arc::new(MaxSlots::default());
         let (completed_data_sets_sender, completed_data_sets_receiver) =
             bounded(MAX_COMPLETED_DATA_SETS_IN_CHANNEL);
         let completed_data_sets_service = CompletedDataSetsService::new(
@@ -421,6 +423,7 @@ impl Validator {
             blockstore.clone(),
             subscriptions.clone(),
             &exit,
+            max_slots.clone(),
         );
 
         info!(
@@ -485,6 +488,7 @@ impl Validator {
                         optimistically_confirmed_bank.clone(),
                         config.send_transaction_retry_ms,
                         config.send_transaction_leader_forward_count,
+                        max_slots.clone(),
                     ),
                     pubsub_service: PubSubService::new(
                         config.pubsub_config.clone(),
@@ -654,6 +658,7 @@ impl Validator {
                 rocksdb_compaction_interval: config.rocksdb_compaction_interval,
                 rocksdb_max_compaction_jitter: config.rocksdb_compaction_interval,
             },
+            &max_slots,
         );
 
         let tpu = Tpu::new(
diff --git a/docs/src/developing/clients/jsonrpc-api.md b/docs/src/developing/clients/jsonrpc-api.md
index e82d36893..7a0b4ed82 100644
--- a/docs/src/developing/clients/jsonrpc-api.md
+++ b/docs/src/developing/clients/jsonrpc-api.md
@@ -42,6 +42,8 @@ gives a convenient interface for the RPC methods.
 - [getInflationRate](jsonrpc-api.md#getinflationrate)
 - [getLargestAccounts](jsonrpc-api.md#getlargestaccounts)
 - [getLeaderSchedule](jsonrpc-api.md#getleaderschedule)
+- [getMaxRetransmitSlot](jsonrpc-api.md#getmaxretransmitslot)
+- [getMaxShredInsertSlot](jsonrpc-api.md#getmaxshredinsertslot)
 - [getMinimumBalanceForRentExemption](jsonrpc-api.md#getminimumbalanceforrentexemption)
 - [getMultipleAccounts](jsonrpc-api.md#getmultipleaccounts)
 - [getProgramAccounts](jsonrpc-api.md#getprogramaccounts)
@@ -1612,6 +1614,50 @@ Result:
 }
 ```
 
+### getMaxRetransmitSlot
+
+Get the max slot seen from retransmit stage.
+
+#### Results:
+
+- `<u64>` - Slot
+
+#### Example:
+
+Request:
+```bash
+curl http://localhost:8899 -X POST -H "Content-Type: application/json" -d '
+  {"jsonrpc":"2.0","id":1, "method":"getMaxRetransmitSlot"}
+'
+```
+
+Result:
+```json
+{"jsonrpc":"2.0","result":1234,"id":1}
+```
+
+### getMaxShredInsertSlot
+
+Get the max slot seen from after shred insert.
+
+#### Results:
+
+- `<u64>` - Slot
+
+#### Example:
+
+Request:
+```bash
+curl http://localhost:8899 -X POST -H "Content-Type: application/json" -d '
+  {"jsonrpc":"2.0","id":1, "method":"getMaxShredInsertSlot"}
+'
+```
+
+Result:
+```json
+{"jsonrpc":"2.0","result":1234,"id":1}
+```
+
 ### getMinimumBalanceForRentExemption
 
 Returns minimum balance required to make account rent exempt.