diff --git a/lib/services/bitcoind/index.js b/lib/services/bitcoind/index.js
index 6838bb96..912dfe71 100644
--- a/lib/services/bitcoind/index.js
+++ b/lib/services/bitcoind/index.js
@@ -123,20 +123,20 @@ Bitcoin.prototype._initDefaults = function(options) {
 
 Bitcoin.prototype._initCaches = function() {
   // caches valid until there is a new block
-  this.utxosCache = LRU(500);
-  this.txidsCache = LRU(500);
-  this.balanceCache = LRU(500);
-  this.summaryCache = LRU(500);
+  this.utxosCache = LRU(5);
+  this.txidsCache = LRU(5);
+  this.balanceCache = LRU(5);
+  this.summaryCache = LRU(5);
   this.blockOverviewCache = LRU(12);
-  this.transactionDetailedCache = LRU(1000);
+  this.transactionDetailedCache = LRU(10);
 
   // caches valid indefinitely
-  this.transactionCache = LRU(1000);
-  this.rawTransactionCache = LRU(500);
+  this.transactionCache = LRU(10);
+  this.rawTransactionCache = LRU(5);
   this.blockCache = LRU(12);
   this.rawBlockCache = LRU(6);
-  this.blockHeaderCache = LRU(24);
-  this.zmqKnownTransactions = LRU(50);
+  this.blockHeaderCache = LRU(12);
+  this.zmqKnownTransactions = LRU(5);
   this.zmqKnownBlocks = LRU(1);
   this.lastTip = 0;
   this.lastTipTimeout = false;
diff --git a/lib/services/db/sync.js b/lib/services/db/sync.js
index a8a31f98..77d00037 100644
--- a/lib/services/db/sync.js
+++ b/lib/services/db/sync.js
@@ -63,7 +63,7 @@ function Sync(node, db) {
   this.node = node;
   this.db = db;
   this.syncing = false;
-  this.highWaterMark = 100;
+  this.highWaterMark = 10;
   this.progressBar = null;
   this.lastReportedBlock = 0;
 }
diff --git a/lib/services/wallet-api/index.js b/lib/services/wallet-api/index.js
index e51ed54f..526c0d85 100644
--- a/lib/services/wallet-api/index.js
+++ b/lib/services/wallet-api/index.js
@@ -652,7 +652,7 @@ WalletService.prototype._getUtxos = function(walletId, callback) {
       outputIndex: key.outputIndex,
       height: value.height,
       satoshis: value.satoshis,
-      script: value.script
+      scriptPubKey: value.script.toHex()
     });
   });
 
@@ -761,7 +761,6 @@ WalletService.prototype._removeWallet = function(walletId, callback) {
   async.map(Object.keys(self._encoding.subKeyMap), function(prefix, next) {
     var keys = [];
 
-    var walletIdBuffer = new Buffer(walletId, 'utf8');
     var start = self._encoding.subKeyMap[prefix].fn.call(self._encoding, walletId);
     var end = new Buffer.concat([self._encoding.subKeyMap[prefix].fn.call(self._encoding, walletId), new Buffer('ff', 'hex')]);