Merge pull request #1149 from ipfs/fix/better-mem-prof

write memory profiles every 30 seconds when enabled

cmd/ipfs/main.go

@@ -453,15 +453,19 @@ func startProfiling() (func(), error) {
 		return nil, err
 	}
 	pprof.StartCPUProfile(ofi)
-
+	go func() {
-	stopProfiling := func() {
+		for _ = range time.NewTicker(time.Second * 30).C {
-		pprof.StopCPUProfile()
-		defer ofi.Close() // captured by the closure
 			err := writeHeapProfileToFile()
 			if err != nil {
 				log.Critical(err)
 			}
 		}
+	}()
+
+	stopProfiling := func() {
+		pprof.StopCPUProfile()
+		defer ofi.Close() // captured by the closure
+	}
 	return stopProfiling, nil
 }