diff --git a/examples/configure.rb b/examples/configure.rb
index 1308950..a8d86ff 100644
--- a/examples/configure.rb
+++ b/examples/configure.rb
@@ -18,4 +18,4 @@
 puts "Libvirt version: #{ver[0]}"
 puts "Hypervisor Type version: #{ver[1]}"
 
-conn = Libvirt::open("qemu+ssh://#{@hypervisor['user']}@#{@hypervisor['host']}/system")
\ No newline at end of file
+@conn = Libvirt::open("qemu+ssh://#{@hypervisor['user']}@#{@hypervisor['host']}/system")
\ No newline at end of file
diff --git a/examples/connet_to_hv.rb b/examples/connet_to_hv.rb
index 1ecad1b..6d1c05b 100755
--- a/examples/connet_to_hv.rb
+++ b/examples/connet_to_hv.rb
@@ -4,7 +4,7 @@
 
 # retrieve basic information about the hypervisor.  See the libvirt
 # documentation for more information about what each of these fields mean.
-nodeinfo = conn.node_get_info
+nodeinfo = @conn.node_get_info
 puts "Hypervisor Nodeinfo:"
 puts " Model:         #{nodeinfo.model}"
 puts " Memory:        #{nodeinfo.memory}"
@@ -17,7 +17,7 @@
 
 # print the amount of free memory in every NUMA node on the hypervisor
 begin
-  cellsmem = conn.node_cells_free_memory
+  cellsmem = @conn.node_cells_free_memory
   puts "Hypervisor NUMA node free memory:"
   cellsmem.each_with_index do |cell,index|
     puts " Node #{index}: #{cell}"
@@ -26,54 +26,54 @@
   # this call may not be supported; if so, just ignore
 end
 
-# print the type of the connection.  This will be "QEMU" for qemu, "XEN" for
+# print the type of the @connection.  This will be "QEMU" for qemu, "XEN" for
 # xen, etc.
-puts "Hypervisor Type: #{conn.type}"
+puts "Hypervisor Type: #{@conn.type}"
 # print the hypervisor version
-puts "Hypervisor Version: #{conn.version}"
+puts "Hypervisor Version: #{@conn.version}"
 # print the libvirt version on the hypervisor
-puts "Hypervisor Libvirt version: #{conn.libversion}"
+puts "Hypervisor Libvirt version: #{@conn.libversion}"
 # print the hypervisor hostname (deprecated)
-puts "Hypervisor Hostname: #{conn.hostname}"
-puts "Hypervisor Max Vcpus: #{conn.max_vcpus}"
-puts "Domains (VMs - online): #{conn.num_of_domains}"
-puts "Retrieve a list of inactive domain names on this connection:  #{conn.list_defined_domains.inspect}"
+puts "Hypervisor Hostname: #{@conn.hostname}"
+puts "Hypervisor Max Vcpus: #{@conn.max_vcpus}"
+puts "Domains (VMs - online): #{@conn.num_of_domains}"
+puts "Retrieve a list of inactive domain names on this @connection:  #{@conn.list_defined_domains.inspect}"
 
-online_domains = conn.list_domains
+online_domains = @conn.list_domains
 puts "Online Domains: #{online_domains.inspect}"
 puts 'GET get domain info by ID:'
-puts conn.lookup_domain_by_id(online_domains.first).inspect
+puts @conn.lookup_domain_by_id(online_domains.first).inspect
 
 
-# print the URI in use on this connection.  Note that this may be different
+# print the URI in use on this @connection.  Note that this may be different
 # from the one passed into Libvirt::open, since libvirt may decide to
 # canonicalize the URI
-puts "Hypervisor URI: #{conn.uri}"
+puts "Hypervisor URI: #{@conn.uri}"
 # print the amount of free memory on the hypervisor
 begin
-  puts "Hypervisor Free Memory: #{conn.node_free_memory}"
+  puts "Hypervisor Free Memory: #{@conn.node_free_memory}"
 rescue
   # this call may not be supported; if so, just ignore
 end
 
 # print the security model in use on the hypervisor
-secmodel = conn.node_get_security_model
+secmodel = @conn.node_get_security_model
 puts "Hypervisor Security Model:"
 puts " Model: #{secmodel.model}"
 puts " DOI:   #{secmodel.doi}"
 
-# print whether the connection to the hypervisor is encrypted
-puts "Hypervisor connection encrypted?: #{conn.encrypted?}"
-# print whether the connection to the hypervisor is secure
-puts "Hypervisor connection secure?: #{conn.secure?}"
+# print whether the @connection to the hypervisor is encrypted
+puts "Hypervisor @connection encrypted?: #{@conn.encrypted?}"
+# print whether the @connection to the hypervisor is secure
+puts "Hypervisor @connection secure?: #{@conn.secure?}"
 # print the capabilities XML for the hypervisor.  A detailed explanation of
 # the XML format can be found in the libvirt documentation.
 #puts "Hypervisor capabilities XML:"
-#puts conn.capabilities
+#puts @conn.capabilities
 
 #
-# # close the connection
- conn.close
+# # close the @connection
+ @conn.close
 #
 # # after close, the closed? should return true
- puts "After close, connection closed?: #{conn.closed?}"
+ puts "After close, @connection closed?: #{@conn.closed?}"
diff --git a/examples/dom_stats.rb b/examples/dom_stats.rb
index cd1de70..a927054 100644
--- a/examples/dom_stats.rb
+++ b/examples/dom_stats.rb
@@ -2,3 +2,12 @@
 
 require './configure.rb'
 
+active_domains = conn.list_domains
+
+begin
+  dom = @conn.lookup_domain_by_id(active_domains.first)
+rescue
+  puts 'There is not found avtive domains'
+end
+
+dom.block_stats(path)
\ No newline at end of file
diff --git a/examples/domain_destroy.rb b/examples/domain_destroy.rb
index 2e4dd81..6959861 100755
--- a/examples/domain_destroy.rb
+++ b/examples/domain_destroy.rb
@@ -8,14 +8,14 @@
 #puts 'GET get domain info by ID:'
 #dom = conn.lookup_domain_by_id(online_domains.first)
 
-dom = conn.lookup_domain_by_name('hw21tb33hlum1a')
+dom = @conn.lookup_domain_by_name('hw21tb33hlum1a')
 puts "Domain name: #{dom.name}"
 puts "Domain info: #{dom.info.inspect}"
 
-puts "Active domains: #{conn.list_domains}.inspect"
+puts "Active domains: #{@conn.list_domains}.inspect"
 puts "ACTIVE ? " + dom.active?.inspect
 
 puts "Shutdown"
 dom.shutdown
 
-puts "Active domains: #{conn.list_domains}.inspect"
+puts "Active domains: #{@conn.list_domains}.inspect"
diff --git a/examples/domain_start.rb b/examples/domain_start.rb
index de5382a..4952280 100755
--- a/examples/domain_start.rb
+++ b/examples/domain_start.rb
@@ -62,7 +62,7 @@
 # once they are stopped, libvirt forgets about them.
 puts "Creating transient domain ruby-libvirt-tester"
 begin
-  dom = conn.create_domain_xml(new_dom_xml)
+  dom = @conn.create_domain_xml(new_dom_xml)
 rescue
   dom.undefine
 end
@@ -75,7 +75,7 @@
 # makes libvirt aware of the domain as a persistent entity; it does not start
 # or otherwise change the domain
 puts "Defining permanent domain ruby-libvirt-tester"
-dom = conn.define_domain_xml(new_dom_xml)
+dom = @conn.define_domain_xml(new_dom_xml)
 
 # start the domain
 puts "Starting permanent domain ruby-libvirt-tester"
@@ -86,7 +86,7 @@
 puts "Domain name: #{dom.name}"
 puts "Domain info: #{dom.info.inspect}"
 puts "ACTIVE ? " + dom.active?.inspect
-puts "Active domains: #{conn.list_domains}.inspect"
+puts "Active domains: #{@conn.list_domains}.inspect"
 
 
 begin
@@ -109,6 +109,6 @@
 puts "Undefining permanent domain ruby-libvirt-tester"
 dom.undefine
 
-conn.close
+@conn.close
 
 
diff --git a/examples/vms_list.rb b/examples/vms_list.rb
index 5571671..cd128af 100755
--- a/examples/vms_list.rb
+++ b/examples/vms_list.rb
@@ -3,20 +3,20 @@
 require './configure.rb'
 
 # list of inactive domain names on this connection.
-list_defined_domains = conn.list_defined_domains
+list_defined_domains = @conn.list_defined_domains
 
 puts "Offline domains: #{list_defined_domains.inspect}"
 list_defined_domains.each do |name|
-  dom = conn.lookup_domain_by_name(name)
+  dom = @conn.lookup_domain_by_name(name)
   puts dom.name
 end
 
 puts '=============='
 # list active VMs
-online_domains = conn.list_domains
+online_domains = @conn.list_domains
 
 puts "Online domains: #{online_domains.inspect}"
 online_domains.each do |dom_id|
-  _dom = conn.lookup_domain_by_id(dom_id.to_i)
+  _dom = @conn.lookup_domain_by_id(dom_id.to_i)
   puts _dom.name
 end