new file mode 100644
--- /dev/null
+++ b/memcached_keepalive.t
@@ -0,0 +1,188 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Test for memcached with keepalive.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval { require Cache::Memcached; };
+plan(skip_all => 'Cache::Memcached not installed') if $@;
+
+my $t = Test::Nginx->new()->has('rewrite')->has_daemon('memcached')->plan(16)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    upstream memd {
+        server 127.0.0.1:8081;
+        keepalive 1;
+    }
+
+    upstream memd3 {
+        server 127.0.0.1:8081;
+        server 127.0.0.1:8082;
+        keepalive 1;
+    }
+
+    upstream memd4 {
+        server 127.0.0.1:8081;
+        server 127.0.0.1:8082;
+        keepalive 10;
+    }
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location / {
+            set $memcached_key $uri;
+            memcached_pass memd;
+        }
+
+        location /next {
+            set $memcached_key $uri;
+            memcached_next_upstream  not_found;
+            memcached_pass memd;
+        }
+
+        location /memd3 {
+            set $memcached_key "/";
+            memcached_pass memd3;
+        }
+
+        location /memd4 {
+            set $memcached_key "/";
+            memcached_pass memd4;
+        }
+    }
+}
+
+EOF
+
+my $memhelp = `memcached -h`;
+my @memopts1 = ();
+my @memopts2 = ();
+
+if ($memhelp =~ /repcached/) {
+	# repcached patches adds additional listen socket memcached
+	# that should be different too
+
+	push @memopts1, '-X', '8091';
+	push @memopts2, '-X', '8092';
+}
+if ($memhelp =~ /-U/) {
+	# UDP ports no longer off by default in memcached 1.2.7+
+
+	push @memopts1, '-U', '0';
+	push @memopts2, '-U', '0';
+}
+
+$t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8081', @memopts1);
+$t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8082', @memopts2);
+
+$t->run();
+
+$t->waitforsocket('127.0.0.1:8081')
+	or die "Unable to start memcached";
+$t->waitforsocket('127.0.0.1:8082')
+	or die "Unable to start second memcached";
+
+###############################################################################
+
+my $memd1 = Cache::Memcached->new(servers => [ '127.0.0.1:8081' ]);
+my $memd2 = Cache::Memcached->new(servers => [ '127.0.0.1:8082' ]);
+
+$memd1->set('/', 'SEE-THIS');
+$memd2->set('/', 'SEE-THIS');
+$memd1->set('/big', 'X' x 1000000);
+
+my $total = $memd1->stats()->{total}->{total_connections};
+
+like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request');
+like(http_get('/notfound'), qr/404/, 'keepalive memcached not found');
+like(http_get('/next'), qr/404/,
+	'keepalive not found with memcached_next_upstream');
+like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
+like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
+like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
+
+is($memd1->stats()->{total}->{total_connections}, $total + 1,
+	'only one connection used');
+
+# Since nginx doesn't read all data from connection in some situations (head
+# requests, post_action, errors writing to client) we have to close such
+# connections.  Check if we really do close them.
+
+$total = $memd1->stats()->{total}->{total_connections};
+
+unlike(http_head('/'), qr/SEE-THIS/, 'head request');
+like(http_get('/'), qr/SEE-THIS/, 'get after head');
+
+is($memd1->stats()->{total}->{total_connections}, $total + 1,
+	'head request closes connection');
+
+$total = $memd1->stats()->{total}->{total_connections};
+
+unlike(http_head('/big'), qr/XXX/, 'big head');
+like(http_get('/'), qr/SEE-THIS/, 'get after big head');
+
+is($memd1->stats()->{total}->{total_connections}, $total + 1,
+	'big head request closes connection');
+
+# two backends with maximum number of cached connections set to 1,
+# should establish new connection on each request
+
+$total = $memd1->stats()->{total}->{total_connections} +
+	$memd2->stats()->{total}->{total_connections};
+
+http_get('/memd3');
+http_get('/memd3');
+http_get('/memd3');
+
+is($memd1->stats()->{total}->{total_connections} +
+	$memd2->stats()->{total}->{total_connections}, $total + 3,
+	'3 connections should be established');
+
+# two backends with maximum number of cached connections set to 10,
+# should establish only two connections (1 per backend)
+
+$total = $memd1->stats()->{total}->{total_connections} +
+	$memd2->stats()->{total}->{total_connections};
+
+http_get('/memd4');
+http_get('/memd4');
+http_get('/memd4');
+
+is($memd1->stats()->{total}->{total_connections} +
+	$memd2->stats()->{total}->{total_connections}, $total + 2,
+	'connection per backend');
+
+$t->stop();
+
+like(`grep -F '[alert]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no alerts');
+
+###############################################################################