diff --git a/bench/walletdb.js b/bench/walletdb.js
index a22b4616..54824f0b 100644
--- a/bench/walletdb.js
+++ b/bench/walletdb.js
@@ -48,7 +48,7 @@ function runBench(callback) {
     },
     function(next) {
       var end = bench('accounts');
-      utils.forRange(0, 5000, function(i, next) {
+      utils.forRange(0, 1000, function(i, next) {
         wallet.createAccount({}, function(err, account) {
           assert.ifError(err);
           addrs.push(account.receiveAddress.getAddress());
diff --git a/lib/bcoin/walletdb.js b/lib/bcoin/walletdb.js
index fd5e366a..025a7552 100644
--- a/lib/bcoin/walletdb.js
+++ b/lib/bcoin/walletdb.js
@@ -54,8 +54,9 @@ function WalletDB(options) {
   // We need one read lock for `get` and `create`.
   // It will hold locks specific to wallet ids.
   this.readLock = new ReadLock(this);
-  this.accountCache = new bcoin.lru(100000, 1);
-  this.walletCache = new bcoin.lru(100000, 1);
+
+  this.accountCache = new bcoin.lru(10000, 1);
+  this.walletCache = new bcoin.lru(10000, 1);
   this.pathCache = new bcoin.lru(100000, 1);
 
   this.db = bcoin.ldb({
@@ -450,6 +451,13 @@ WalletDB.prototype.get = function get(id, callback) {
   });
 };
 
+/**
+ * Get a wallet from the database, do not setup watcher.
+ * @private
+ * @param {WalletID} id
+ * @param {Function} callback - Returns [Error, {@link Wallet}].
+ */
+
 WalletDB.prototype._get = function get(id, callback) {
   var self = this;
   var wallet;
@@ -655,6 +663,14 @@ WalletDB.prototype.getAccount = function getAccount(id, name, callback) {
   });
 };
 
+/**
+ * Get an account from the database. Do not setup watcher.
+ * @private
+ * @param {WalletID} id
+ * @param {Number} index - Account index.
+ * @param {Function} callback - Returns [Error, {@link Wallet}].
+ */
+
 WalletDB.prototype._getAccount = function getAccount(id, index, callback) {
   var self = this;
   var key = id + '/' + index;
@@ -894,6 +910,12 @@ WalletDB.prototype.saveAddress = function saveAddress(id, addresses, callback) {
   });
 };
 
+/**
+ * Retrieve paths by hash.
+ * @param {Hash} hash
+ * @param {Function} callback
+ */
+
 WalletDB.prototype._getPaths = function _getPaths(hash, callback) {
   var self = this;
   var paths;