diff --git a/shard.lock b/shard.lock
index cc7bf0a629..0a1186365a 100644
--- a/shard.lock
+++ b/shard.lock
@@ -16,6 +16,10 @@ shards:
     git: https://github.com/84codes/lz4.cr.git
     version: 1.0.0+git.commit.96d714f7593c66ca7425872fd26c7b1286806d3d
 
+  perf_tools:
+    git: https://github.com/beta-ziliani/perf-tools.git
+    version: 0.1.0+git.commit.a0f545af92c8347b4339bb3409add5f5f6045a6d
+
   systemd:
     git: https://github.com/84codes/systemd.cr.git
     version: 2.0.0
diff --git a/shard.yml b/shard.yml
index ec2ca34f61..79ccf17dd5 100644
--- a/shard.yml
+++ b/shard.yml
@@ -36,6 +36,9 @@ dependencies:
 development_dependencies:
   ameba:
     github: crystal-ameba/ameba
+  perf_tools:
+    github: beta-ziliani/perf-tools
+    branch: feat/refered
 
 crystal: 1.13.0
 
diff --git a/src/lavinmq.cr b/src/lavinmq.cr
index 91484cc5fb..4fe0dcc5cd 100644
--- a/src/lavinmq.cr
+++ b/src/lavinmq.cr
@@ -1,3 +1,4 @@
+require "perf_tools/mem_prof"
 require "./lavinmq/version"
 require "./stdlib/*"
 require "./lavinmq/config"
diff --git a/src/lavinmq/launcher.cr b/src/lavinmq/launcher.cr
index 4e170e6859..7a5fd4c260 100644
--- a/src/lavinmq/launcher.cr
+++ b/src/lavinmq/launcher.cr
@@ -172,6 +172,9 @@ module LavinMQ
     end
 
     private def run_gc
+      STDOUT.puts "Log objects linkted to MFile"
+      STDOUT.flush
+      PerfTools::MemProf.log_objects_linked_to_type STDOUT, MFile, true
       STDOUT.puts "Unmapping all segments"
       STDOUT.flush
       @amqp_server.vhosts.each_value do |vhost|
diff --git a/src/lavinmq/mfile.cr b/src/lavinmq/mfile.cr
index 394bd5c1ea..14b8595720 100644
--- a/src/lavinmq/mfile.cr
+++ b/src/lavinmq/mfile.cr
@@ -168,6 +168,8 @@ class MFile < IO
   end
 
   def finalize
+    LibC.printf("mfile#finalize %s\n", @path)
+    PerfTools::MemProf.untrack self.as(Pointer(Void)) # https://github.com/crystal-lang/perf-tools/issues/19
     LibC.close(@fd) if @fd > -1
     LibC.munmap(@buffer, @capacity) unless @buffer.null?
   end