diff --git a/counterpartylib/lib/backend/__init__.py b/counterpartylib/lib/backend/__init__.py
index 80fa7ca5e6..93b0ac6800 100644
--- a/counterpartylib/lib/backend/__init__.py
+++ b/counterpartylib/lib/backend/__init__.py
@@ -245,8 +245,4 @@ def init_mempool_cache():
     logger.debug('Mempool cache initialized: {}s for {} transactions'.format(time.time() - start, len(txhash_list) + len(vin_txhash_list)))
 
 
-def clear_mempool_cache():
-    logger.debug('Clear mempool cache')
-    BACKEND().RAW_TRANSACTIONS_CACHE = {}
-
 # vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
diff --git a/counterpartylib/lib/backend/addrindex.py b/counterpartylib/lib/backend/addrindex.py
index cbd2761dfd..6f677c71f8 100644
--- a/counterpartylib/lib/backend/addrindex.py
+++ b/counterpartylib/lib/backend/addrindex.py
@@ -160,8 +160,10 @@ def getrawmempool():
 def sendrawtransaction(tx_hex):
     return rpc('sendrawtransaction', [tx_hex])
 
-
+# TODO: move to __init__.py
 RAW_TRANSACTIONS_CACHE = {}
+RAW_TRANSACTIONS_CACHE_KEYS = []
+RAW_TRANSACTIONS_CACHE_SIZE = 10000
 
 def getrawtransaction_batch(txhash_list, verbose=False):
     tx_hash_call_id = {}
@@ -185,6 +187,11 @@ def getrawtransaction_batch(txhash_list, verbose=False):
                 tx_hex = response['result']
                 tx_hash = tx_hash_call_id[response['id']]
                 RAW_TRANSACTIONS_CACHE[tx_hash] = tx_hex
+                RAW_TRANSACTIONS_CACHE_KEYS.append(tx_hash)
+                while len(RAW_TRANSACTIONS_CACHE_KEYS) > RAW_TRANSACTIONS_CACHE_SIZE:
+                    first_hash = RAW_TRANSACTIONS_CACHE_KEYS[0]
+                    del(RAW_TRANSACTIONS_CACHE[first_hash])
+                    RAW_TRANSACTIONS_CACHE_KEYS.pop(0)
             else:
                 raise BackendRPCError('{}'.format(response['error']))
 
diff --git a/counterpartylib/lib/backend/btcd.py b/counterpartylib/lib/backend/btcd.py
index 1df20cb7ce..59dfef2f99 100644
--- a/counterpartylib/lib/backend/btcd.py
+++ b/counterpartylib/lib/backend/btcd.py
@@ -77,7 +77,7 @@ def get_chunks(l, n):
         responses += rpc_call(chunk)
     '''
     for query in payload:
-        responses += rpc_call(query)
+        responses.append(rpc_call(query))
 
     return responses
 
@@ -111,7 +111,10 @@ def getrawtransaction(tx_hash, verbose=False):
 def getrawmempool():
     return rpc('getrawmempool', [])
 
+# TODO: move to __init__.py
 RAW_TRANSACTIONS_CACHE = {}
+RAW_TRANSACTIONS_CACHE_KEYS = []
+RAW_TRANSACTIONS_CACHE_SIZE = 10000
 
 def getrawtransaction_batch(txhash_list, verbose=False):
     tx_hash_call_id = {}
@@ -130,13 +133,14 @@ def getrawtransaction_batch(txhash_list, verbose=False):
 
     if len(payload) > 0:
         batch_responses = rpc_batch(payload)
-        for response in batch_responses:
-            if 'error' not in response or response['error'] is None:
-                tx_hex = response['result']
-                tx_hash = tx_hash_call_id[response['id']]
-                RAW_TRANSACTIONS_CACHE[tx_hash] = tx_hex
-            else:
-                raise BackendRPCError('{}'.format(response['error']))
+        for tx_hex in batch_responses:
+            tx_hash = tx_hex['txid']
+            RAW_TRANSACTIONS_CACHE[tx_hash] = tx_hex
+            RAW_TRANSACTIONS_CACHE_KEYS.append(tx_hash)
+            while len(RAW_TRANSACTIONS_CACHE_KEYS) > RAW_TRANSACTIONS_CACHE_SIZE:
+                first_hash = RAW_TRANSACTIONS_CACHE_KEYS[0]
+                del(RAW_TRANSACTIONS_CACHE[first_hash])
+                RAW_TRANSACTIONS_CACHE_KEYS.pop(0)
 
     result = {}
     for tx_hash in txhash_list:
diff --git a/counterpartylib/lib/blocks.py b/counterpartylib/lib/blocks.py
index 3a75018cf7..501c348608 100644
--- a/counterpartylib/lib/blocks.py
+++ b/counterpartylib/lib/blocks.py
@@ -1012,7 +1012,6 @@ def follow(db):
 
             # When newly caught up, check for conservation of assets.
             if block_index == block_count:
-                backend.clear_mempool_cache()
                 if config.CHECK_ASSET_CONSERVATION:
                     check.asset_conservation(db)