diff --git a/plugins/thin/thin_memory b/plugins/thin/thin_memory
index afbb20d9..cf7814df 100755
--- a/plugins/thin/thin_memory
+++ b/plugins/thin/thin_memory
@@ -41,10 +41,11 @@ module Munin
     
     # run main method
     def run
-      pids = get_pids()
-      pids.sort.each do |pid|
+      instances = get_pids()
+      instances.each do |instance|
+        pid, port = instance.split("|")
         rss = (pid_rss(pid).to_i)/1024
-        puts "thin_#{pid}.value #{rss}"
+        puts "thin_#{port}.value #{rss}"
       end
     end
     
@@ -60,7 +61,7 @@ module Munin
     
     # fetch all pids that match thin
     def get_pids
-      pids = `pgrep thin`.split
+      pids = `pgrep -f 'thin' -l | awk -F " " '{ if (substr( $4, 10, 4)>=1) print $1"|"substr( $4, 10, 4)}'`.split(/\r?\n/)
     end
 
     def autoconf
@@ -80,11 +81,12 @@ when "config"
   puts "graph_args --base 1024 -l 0"
   puts "graph_scale yes"
   puts "graph_info Tracks the size of individual thin processes"
-  mpm.get_pids.sort.each do |pid|
-    puts "thin_#{pid}.label thin_#{pid}"
-    puts "thin_#{pid}.info Process memory"
-    puts "thin_#{pid}.type GAUGE"
-    puts "thin_#{pid}.min 0"
+  mpm.get_pids.sort.each do |instance|
+    pid, port = instance.split("|")
+    puts "thin_#{port}.label thin_#{port}"
+    puts "thin_#{port}.info Process memory"
+    puts "thin_#{port}.type GAUGE"
+    puts "thin_#{port}.min 0"
   end
 when "autoconf"
   if mpm.autoconf
diff --git a/plugins/thin/thin_threads b/plugins/thin/thin_threads
index 1f39b906..16cbd567 100755
--- a/plugins/thin/thin_threads
+++ b/plugins/thin/thin_threads
@@ -41,10 +41,11 @@ module Munin
   class ThinThreads
     
     def run
-      pids = get_pids()
-      pids.sort.each do |pid|
-        res = (get_threads(pid).to_i)
-        puts "thin_#{pid}.value #{res}"
+      instances = get_pids()
+      instances.each do |instance|
+        pid, port = instance.split("|")
+        rss = (get_threads(pid).to_i)/1024
+        puts "thin_#{port}.value #{rss}"
       end
     end
     
@@ -61,13 +62,10 @@ module Munin
         return res
       end
     end
-    
-    
-    # Get pis using lsof (list open files) 
-    #   look for listening tcp applications 
-    #   that match the name thin
+        
+    # fetch all pids that match thin
     def get_pids
-      pids = `pgrep thin`.split
+      pids = `pgrep -f 'thin' -l | awk -F " " '{ if (substr( $4, 10, 4)>=1) print $1"|"substr( $4, 10, 4)}'`.split(/\r?\n/)
     end
 
     def autoconf
@@ -87,11 +85,12 @@ when "config"
   puts "graph_args -l 0"
   puts "graph_scale yes"
   puts "graph_info Tracks how many threads per thin processes"
-  mpm.get_pids.sort.each do |pid|
-    puts "thin_#{pid}.label thin_#{pid}"
-    puts "thin_#{pid}.info Threads per Thin process"
-    puts "thin_#{pid}.type GAUGE"
-    puts "thin_#{pid}.min 0"
+  mpm.get_pids.sort.each do |instance|
+    pid, port = instance.split("|")    
+    puts "thin_#{port}.label thin_#{port}"
+    puts "thin_#{port}.info Threads per Thin process"
+    puts "thin_#{port}.type GAUGE"
+    puts "thin_#{port}.min 0"
   end
 when "autoconf"
   if mpm.autoconf
diff --git a/plugins/thin/thins_peak_memory b/plugins/thin/thins_peak_memory
index 4d9b7123..049fda29 100755
--- a/plugins/thin/thins_peak_memory
+++ b/plugins/thin/thins_peak_memory
@@ -38,9 +38,9 @@ module Munin
   class ThinPeakMemory
     
     def run
-      pids = get_pids()
-      port_list = Hash.new
-      pids.sort.each do |pid, port|
+      instances = get_pids()
+      instances.each do |instance|
+        pid, port = instance.split("|")
         hwm = (pid_hwm(pid).to_i)/1024
         puts "thin_#{port}.value #{hwm}"
       end
@@ -61,18 +61,9 @@ module Munin
       end
     end
     
-    # Get pis using lsof (list open files) 
-    #   look for listening tcp applications 
-    #   that match the name thin
+    # fetch all pids that match thin
     def get_pids
-      pids_ports = []
-      pids = `pgrep thin`.split
-      pids.each do |t|
-        port = `lsof -p #{t} | grep LISTEN`.split[8]
-        port = port.split(":")[1]
-        pids_ports << [t,port]
-      end
-      pids_ports
+      pids = `pgrep -f 'thin' -l | awk -F " " '{ if (substr( $4, 10, 4)>=1) print $1"|"substr( $4, 10, 4)}'`.split(/\r?\n/)
     end
 
     def autoconf
@@ -92,7 +83,8 @@ when "config"
   puts "graph_args -l 0"
   puts "graph_scale yes"
   puts "graph_info Tracks the peak memory of thin processes, aka High Water Mark."
-  mpm.get_pids.sort.each do |pid,port|
+  mpm.get_pids.sort.each do |instance|
+    pid, port = instance.split("|")    
     puts "thin_#{port}.label thin_#{port}"
     puts "thin_#{port}.info Peak Memory"
     puts "thin_#{port}.type GAUGE"