/usr/share/memcached/scripts/memcached-tool is in memcached 1.4.21-1.1+deb8u2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | #!/usr/bin/perl
#
# memcached-tool:
# stats/management tool for memcached.
#
# Author:
# Brad Fitzpatrick <brad@danga.com>
#
# Contributor:
# Andrey Niakhaichyk <andrey@niakhaichyk.org>
#
# License:
# public domain. I give up all rights to this
# tool. modify and copy at will.
#
use strict;
use IO::Socket::INET;
my $addr = shift;
my $mode = shift || "display";
my ($from, $to);
if ($mode eq "display") {
undef $mode if @ARGV;
} elsif ($mode eq "move") {
$from = shift;
$to = shift;
undef $mode if $from < 6 || $from > 17;
undef $mode if $to < 6 || $to > 17;
print STDERR "ERROR: parameters out of range\n\n" unless $mode;
} elsif ($mode eq 'dump') {
;
} elsif ($mode eq 'stats') {
;
} elsif ($mode eq 'settings') {
;
} elsif ($mode eq 'sizes') {
;
} else {
undef $mode;
}
undef $mode if @ARGV;
die
"Usage: memcached-tool <host[:port] | /path/to/socket> [mode]\n
memcached-tool 10.0.0.5:11211 display # shows slabs
memcached-tool 10.0.0.5:11211 # same. (default is display)
memcached-tool 10.0.0.5:11211 stats # shows general stats
memcached-tool 10.0.0.5:11211 settings # shows settings stats
memcached-tool 10.0.0.5:11211 sizes # shows sizes stats
memcached-tool 10.0.0.5:11211 dump # dumps keys and values
WARNING! sizes is a development command.
As of 1.4 it is still the only command which will lock your memcached instance for some time.
If you have many millions of stored items, it can become unresponsive for several minutes.
Run this at your own risk. It is roadmapped to either make this feature optional
or at least speed it up.
" unless $addr && $mode;
my $sock;
if ($addr =~ m:/:) {
$sock = IO::Socket::UNIX->new(
Peer => $addr,
);
}
else {
$addr .= ':11211' unless $addr =~ /:\d+$/;
$sock = IO::Socket::INET->new(
PeerAddr => $addr,
Proto => 'tcp',
);
}
die "Couldn't connect to $addr\n" unless $sock;
if ($mode eq 'dump') {
my %items;
my $totalitems;
print $sock "stats items\r\n";
while (<$sock>) {
last if /^END/;
if (/^STAT items:(\d*):number (\d*)/) {
$items{$1} = $2;
$totalitems += $2;
}
}
print STDERR "Dumping memcache contents\n";
print STDERR " Number of buckets: " . scalar(keys(%items)) . "\n";
print STDERR " Number of items : $totalitems\n";
foreach my $bucket (sort(keys(%items))) {
print STDERR "Dumping bucket $bucket - " . $items{$bucket} . " total items\n";
print $sock "stats cachedump $bucket $items{$bucket}\r\n";
my %keyexp;
while (<$sock>) {
last if /^END/;
# return format looks like this
# ITEM foo [6 b; 1176415152 s]
if (/^ITEM (\S+) \[.* (\d+) s\]/) {
$keyexp{$1} = $2;
}
}
foreach my $k (keys(%keyexp)) {
print $sock "get $k\r\n";
my $response = <$sock>;
if ($response =~ /VALUE (\S+) (\d+) (\d+)/) {
my $flags = $2;
my $len = $3;
my $val;
read $sock, $val, $len;
print "add $k $flags $keyexp{$k} $len\r\n$val\r\n";
# get the END
$_ = <$sock>;
$_ = <$sock>;
}
}
}
exit;
}
if ($mode eq 'stats') {
my %items;
print $sock "stats\r\n";
while (<$sock>) {
last if /^END/;
chomp;
if (/^STAT\s+(\S*)\s+(.*)/) {
$items{$1} = $2;
}
}
printf ("#%-17s %5s %11s\n", $addr, "Field", "Value");
foreach my $name (sort(keys(%items))) {
printf ("%24s %12s\n", $name, $items{$name});
}
exit;
}
if ($mode eq 'settings') {
my %items;
print $sock "stats settings\r\n";
while (<$sock>) {
last if /^END/;
chomp;
if (/^STAT\s+(\S*)\s+(.*)/) {
$items{$1} = $2;
}
}
printf ("#%-17s %5s %11s\n", $addr, "Field", "Value");
foreach my $name (sort(keys(%items))) {
printf ("%24s %12s\n", $name, $items{$name});
}
exit;
}
if ($mode eq 'sizes') {
my %items;
print $sock "stats sizes\r\n";
while (<$sock>) {
last if /^END/;
chomp;
if (/^STAT\s+(\S*)\s+(.*)/) {
$items{$1} = $2;
}
}
printf ("#%-17s %5s %11s\n", $addr, "Size", "Count");
foreach my $name (sort(keys(%items))) {
printf ("%24s %12s\n", $name, $items{$name});
}
exit;
}
# display mode:
my %items; # class -> { number, age, chunk_size, chunks_per_page,
# total_pages, total_chunks, used_chunks,
# free_chunks, free_chunks_end }
print $sock "stats items\r\n";
my $max = 0;
while (<$sock>) {
last if /^END/;
if (/^STAT items:(\d+):(\w+) (\d+)/) {
$items{$1}{$2} = $3;
}
}
print $sock "stats slabs\r\n";
while (<$sock>) {
last if /^END/;
if (/^STAT (\d+):(\w+) (\d+)/) {
$items{$1}{$2} = $3;
$max = $1;
}
}
print " # Item_Size Max_age Pages Count Full? Evicted Evict_Time OOM\n";
foreach my $n (1..$max) {
my $it = $items{$n};
next if (0 == $it->{total_pages});
my $size = $it->{chunk_size} < 1024 ?
"$it->{chunk_size}B" :
sprintf("%.1fK", $it->{chunk_size} / 1024.0);
my $full = $it->{free_chunks_end} == 0 ? "yes" : " no";
printf("%3d %8s %9ds %7d %7d %7s %8d %8d %4d\n",
$n, $size, $it->{age}, $it->{total_pages},
$it->{number}, $full, $it->{evicted},
$it->{evicted_time}, $it->{outofmemory});
}
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