diff --git a/app.js b/app.js
index 8afae59..e05de8b 100755
--- a/app.js
+++ b/app.js
@@ -87,13 +87,15 @@ function trackMemoryUsage() {
 	var stream = fs.createWriteStream("memoryUsage.csv", {flags:'a'});
 
 	if (firstCall) {
-		stream.write("App starting up.");
+		stream.write("App starting up.\n");
 	}
 
-	stream.write(new Date().toISOString() + "," + mbUsed + "\n");
-	
+	stream.write(mbUsed + "\n");
+
 	stream.end();
 
+	coreApi.logCacheSizes();
+
 	firstCall = false;
 }
 
diff --git a/app/api/coreApi.js b/app/api/coreApi.js
index bc60685..eda4f11 100644
--- a/app/api/coreApi.js
+++ b/app/api/coreApi.js
@@ -363,6 +363,14 @@ function getRpcMethodHelp(methodName) {
 	});
 }
 
+function logCacheSizes() {
+	var itemCounts = [ miscCache.itemCount, blockCache.itemCount, txCache.itemCount ];
+	
+	var stream = fs.createWriteStream("memoryUsage.csv", {flags:'a'});
+	stream.write("itemCounts: " + JSON.stringify(itemCounts) + "\n");
+	stream.end();
+}
+
 module.exports = {
 	getGenesisBlockHash: getGenesisBlockHash,
 	getGenesisCoinbaseTransactionId: getGenesisCoinbaseTransactionId,
@@ -380,5 +388,6 @@ module.exports = {
 	getUptimeSeconds: getUptimeSeconds,
 	getHelp: getHelp,
 	getRpcMethodHelp: getRpcMethodHelp,
-	getAddress: getAddress
+	getAddress: getAddress,
+	logCacheSizes: logCacheSizes
 };
\ No newline at end of file