stats.t

#!/usr/bin/env perl

use strict;
use Test::More tests => 113;
use FindBin qw($Bin);
use lib "$Bin/lib";
use MemcachedTest;

my $server = new_memcached("-I 1024 -o slab_chunk_max=1024,no_lru_crawler,no_lru_maintainer");
my $sock = $server->sock;


## Output looks like this:
##
## STAT pid 22969
## STAT uptime 13
## STAT time 1259170891
## STAT version 1.4.3
## STAT libevent 1.4.13-stable.
## see doc/protocol.txt for others
# note that auth stats are tested in auth specific tests


my $stats = mem_stats($sock);

# Test number of keys
if (MemcachedTest::enabled_tls_testing()) {
    # when TLS is enabled, stats contains additional keys:
    #   - ssl_handshake_errors
    #   - time_since_server_cert_refresh
    is(scalar(keys(%$stats)), 85, "expected count of stats values");
} else {
    is(scalar(keys(%$stats)), 83, "expected count of stats values");
}

# Test initial state
foreach my $key (qw(curr_items total_items bytes cmd_get cmd_set get_hits evictions get_misses get_expired
                 bytes_written delete_hits delete_misses incr_hits incr_misses decr_hits get_flushed
                 decr_misses listen_disabled_num lrutail_reflocked time_in_listen_disabled_us
                 store_too_large store_no_memory)) {
    is($stats->{$key}, 0, "initial $key is zero");
}
is($stats->{accepting_conns}, 1, "initial accepting_conns is one");

# Do some operations

print $sock "set foo 0 0 6\r\nfooval\r\n";
is(scalar <$sock>, "STORED\r\n", "stored foo");
mem_get_is($sock, "foo", "fooval");

my $stats = mem_stats($sock);

foreach my $key (qw(total_items curr_items cmd_get cmd_set get_hits)) {
    is($stats->{$key}, 1, "after one set/one get $key is 1");
}

my $cache_dump = mem_stats($sock, " cachedump 1 100");
ok(defined $cache_dump->{'foo'}, "got foo from cachedump");

print $sock "delete foo\r\n";
is(scalar <$sock>, "DELETED\r\n", "deleted foo");

my $stats = mem_stats($sock);
is($stats->{delete_hits}, 1);
is($stats->{delete_misses}, 0);

print $sock "delete foo\r\n";
is(scalar <$sock>, "NOT_FOUND\r\n", "shouldn't delete foo again");

my $stats = mem_stats($sock);
is($stats->{delete_hits}, 1);
is($stats->{delete_misses}, 1);

# incr stats

sub check_incr_stats {
    my ($ih, $im, $dh, $dm) = @_;
    my $stats = mem_stats($sock);

    is($stats->{incr_hits}, $ih);
    is($stats->{incr_misses}, $im);
    is($stats->{decr_hits}, $dh);
    is($stats->{decr_misses}, $dm);
}

print $sock "incr i 1\r\n";
is(scalar <$sock>, "NOT_FOUND\r\n", "shouldn't incr a missing thing");
check_incr_stats(0, 1, 0, 0);

print $sock "decr d 1\r\n";
is(scalar <$sock>, "NOT_FOUND\r\n", "shouldn't decr a missing thing");
check_incr_stats(0, 1, 0, 1);

print $sock "set n 0 0 1\r\n0\r\n";
is(scalar <$sock>, "STORED\r\n", "stored n");

print $sock "incr n 3\r\n";
is(scalar <$sock>, "3\r\n", "incr works");
check_incr_stats(1, 1, 0, 1);

print $sock "decr n 1\r\n";
is(scalar <$sock>, "2\r\n", "decr works");
check_incr_stats(1, 1, 1, 1);

# cas stats

sub check_cas_stats {
    my ($ch, $cm, $cb) = @_;
    my $stats = mem_stats($sock);

    is($stats->{cas_hits}, $ch);
    is($stats->{cas_misses}, $cm);
    is($stats->{cas_badval}, $cb);
}

check_cas_stats(0, 0, 0);

print $sock "cas c 0 0 1 99999999\r\nz\r\n";
is(scalar <$sock>, "NOT_FOUND\r\n", "missed cas");
check_cas_stats(0, 1, 0);

print $sock "set c 0 0 1\r\nx\r\n";
is(scalar <$sock>, "STORED\r\n", "stored c");
my ($id, $v) = mem_gets($sock, 'c');
is('x', $v, 'got the expected value');

print $sock "cas c 0 0 1 99999999\r\nz\r\n";
is(scalar <$sock>, "EXISTS\r\n", "missed cas");
check_cas_stats(0, 1, 1);
my ($newid, $v) = mem_gets($sock, 'c');
is('x', $v, 'got the expected value');

print $sock "cas c 0 0 1 $id\r\nz\r\n";
is(scalar <$sock>, "STORED\r\n", "good cas");
check_cas_stats(1, 1, 1);
my ($newid, $v) = mem_gets($sock, 'c');
is('z', $v, 'got the expected value');

my $settings = mem_stats($sock, ' settings');
is(1024, $settings->{'maxconns'});
# we run SSL tests over TCP; hence the domain_socket
# is expected to be NULL.
if (enabled_tls_testing() || !supports_unix_socket()) {
    is('NULL', $settings->{'domain_socket'});
} else {
    isnt('NULL', $settings->{'domain_socket'});
}
is('on', $settings->{'evictions'});
is('yes', $settings->{'cas_enabled'});
is('no', $settings->{'auth_enabled_sasl'});
is('no', $settings->{'shutdown_command'});

print $sock "stats reset\r\n";
is(scalar <$sock>, "RESET\r\n", "good stats reset");

my $stats = mem_stats($sock);
is(0, $stats->{'cmd_get'});
is(0, $stats->{'cmd_set'});
is(0, $stats->{'get_hits'});
is(0, $stats->{'get_misses'});
is(0, $stats->{'get_expired'});
is(0, $stats->{'get_flushed'});
is(0, $stats->{'delete_misses'});
is(0, $stats->{'delete_hits'});
is(0, $stats->{'incr_misses'});
is(0, $stats->{'incr_hits'});
is(0, $stats->{'decr_misses'});
is(0, $stats->{'decr_hits'});
is(0, $stats->{'cas_misses'});
is(0, $stats->{'cas_hits'});
is(0, $stats->{'cas_badval'});
is(0, $stats->{'evictions'});
is(0, $stats->{'reclaimed'});
is(0, $stats->{'lrutail_reflocked'});

# item expired
print $sock "set should_expire 0 2678400 6\r\nfooval\r\n"; #2678400 = 31 days in seconds
is(scalar <$sock>, "STORED\r\n", "set item to expire");
print $sock "get should_expire\r\n";
is(scalar <$sock>, "END\r\n", "item not returned");
my $stats = mem_stats($sock);
is(1, $stats->{'get_expired'}, "get_expired counter is 1");

print $sock "set should_be_flushed 0 0 6\r\nbooval\r\n";
is(scalar <$sock>, "STORED\r\n", "set item to flush");
print $sock "flush_all\r\n";
is(scalar <$sock>, "OK\r\n", "flushed");
print $sock "get should_be_flushed\r\n";
is(scalar <$sock>, "END\r\n", "flushed item not returned");

my $stats = mem_stats($sock);
is($stats->{cmd_flush}, 1, "after one flush cmd_flush is 1");
is($stats->{get_flushed}, 1, "after flush and a get, get_flushed is 1");

# item too large
my $large = "B" x 2048;
my $largelen = length($large);
print $sock "set too_large 0 0 $largelen\r\n$large\r\n";
is(scalar <$sock>, "SERVER_ERROR object too large for cache\r\n",
    "set rejected due to value too large");
$stats = mem_stats($sock);
is($stats->{'store_too_large'}, 1,
    "recorded store failure due to value too large")