From ea872d96f8a2505abb523a5abac8661192fd7c1c Mon Sep 17 00:00:00 2001
From: Raul Ochoa <rochoaf@gmail.com>
Date: Mon, 14 Sep 2015 19:24:24 +0200
Subject: [PATCH] Listen to renderer cache events and log stats

---
 lib/cartodb/stats/reporter/renderer.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/cartodb/stats/reporter/renderer.js b/lib/cartodb/stats/reporter/renderer.js
index 5c01d960..c6843a25 100644
--- a/lib/cartodb/stats/reporter/renderer.js
+++ b/lib/cartodb/stats/reporter/renderer.js
@@ -61,10 +61,23 @@ RendererStatsReporter.prototype.start = function() {
         global.statsClient.gauge('windshaft.mapnik-pool.waiting', renderersStats.pool.waiting);
     }, this.statsInterval);
 
+    this.rendererCache.on('err', rendererCacheErrorListener);
+    this.rendererCache.on('gc', gcTimingListener);
 };
 
+function rendererCacheErrorListener() {
+    global.statsClient.increment('windshaft.rendercache.error');
+}
+
+function gcTimingListener(gcTime) {
+    console.log('gctime');
+    global.statsClient.timing('windshaft.rendercache.gc', gcTime);
+}
 
 RendererStatsReporter.prototype.stop = function() {
+    this.rendererCache.removeListener('err', rendererCacheErrorListener);
+    this.rendererCache.removeListener('gc', gcTimingListener);
+
     clearInterval(this.renderersStatsIntervalId);
     this.renderersStatsIntervalId = null;
 };