Mercurial > hg > memcached

comparison scripts/memcached-tool @ 0:30782bb1fc04 MEMCACHED_1_2_3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
memcached-1.2.3
author Maxim Dounin <mdounin@mdounin.ru>
date Sun, 23 Sep 2007 03:58:34 +0400
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:30782bb1fc04
1 #!/usr/bin/perl
2 #
3 # memcached-tool:
4 # stats/management tool for memcached.
5 #
6 # Author:
7 # Brad Fitzpatrick <brad@danga.com>
8 #
9 # License:
10 # public domain. I give up all rights to this
11 # tool. modify and copy at will.
12 #
13
14 use strict;
15 use IO::Socket::INET;
16
17 my $host = shift;
18 my $mode = shift || "display";
19 my ($from, $to);
20
21 if ($mode eq "display") {
22 undef $mode if @ARGV;
23 } elsif ($mode eq "move") {
24 $from = shift;
25 $to = shift;
26 undef $mode if $from < 6 || $from > 17;
27 undef $mode if $to < 6 || $to > 17;
28 print STDERR "ERROR: parameters out of range\n\n" unless $mode;
29 } elsif ($mode eq 'dump') {
30 ;
31 } else {
32 undef $mode;
33 }
34
35 undef $mode if @ARGV;
36
37 die
38 "Usage: memcached-tool <host[:port]> [mode]\n
39 memcached-tool 10.0.0.5:11211 display # shows slabs
40 memcached-tool 10.0.0.5:11211 # same. (default is display)
41 memcached-tool 10.0.0.5:11211 move 7 9 # takes 1MB slab from class #7
42 # to class #9.
43
44 You can only move slabs around once memory is totally allocated, and only
45 once the target class is full. (So you can't move from #6 to #9 and #7
46 to #9 at the same itme, since you'd have to wait for #9 to fill from
47 the first reassigned page)
48 " unless $host && $mode;
49
50 $host .= ":11211" unless $host =~ /:\d+/;
51
52 my $sock = IO::Socket::INET->new(PeerAddr => $host,
53 Proto => 'tcp');
54 die "Couldn't connect to $host\n" unless $sock;
55
56
57 if ($mode eq "move") {
58 my $tries = 0;
59 while (1) {
60 print $sock "slabs reassign $from $to\r\n";
61 my $res = <$sock>;
62 $res =~ s/\s+//;
63 if ($res eq "DONE") {
64 print "Success.\n";
65 exit 0;
66 } elsif ($res eq "CANT") {
67 print "Error: can't move from $from to $to. Destination not yet full? See usage docs.\n";
68 exit;
69 } elsif ($res eq "BUSY") {
70 if (++$tries == 3) {
71 print "Failed to move after 3 tries. Try again later.\n";
72 exit;
73 }
74
75 print "Page busy, retrying...\n";
76 sleep 1;
77 }
78 }
79
80 exit;
81 }
82
83 if ($mode eq 'dump') {
84 my %items;
85 my $totalitems;
86
87 print $sock "stats items\r\n";
88
89 while (<$sock>) {
90 last if /^END/;
91 if (/^STAT items:(\d*):number (\d*)/) {
92 $items{$1} = $2;
93 $totalitems += $2;
94 }
95 }
96 print STDERR "Dumping memcache contents\n";
97 print STDERR " Number of buckets: " . scalar(keys(%items)) . "\n";
98 print STDERR " Number of items : $totalitems\n";
99
100 foreach my $bucket (sort(keys(%items))) {
101 print STDERR "Dumping bucket $bucket - " . $items{$bucket} . " total items\n";
102 print $sock "stats cachedump $bucket $items{$bucket} 1\r\n";
103 my %keyexp;
104 while (<$sock>) {
105 last if /^END/;
106 # return format looks like this
107 # ITEM foo [6 b; 1176415152 s]
108 if (/^ITEM (\w+) \[.* (\d+) s\]/) {
109 $keyexp{$1} = $2;
110 }
111 }
112
113 foreach my $k (keys(%keyexp)) {
114 my $val;
115 print $sock "get $k\r\n";
116 my $response = <$sock>;
117 $response =~ /VALUE (\w+) (\d+) (\d+)/;
118 my $flags = $2;
119 my $len = $3;
120 read $sock, $val , $len;
121 # get the END
122 $_ = <$sock>;
123 $_ = <$sock>;
124 print "add $k $flags $keyexp{$k} $len\r\n$val\r\n";
125 }
126 }
127 exit;
128 }
129
130 # display mode:
131
132 my %items; # class -> { number, age, chunk_size, chunks_per_page,
133 # total_pages, total_chunks, used_chunks,
134 # free_chunks, free_chunks_end }
135
136 print $sock "stats items\r\n";
137 while (<$sock>) {
138 last if /^END/;
139 if (/^STAT items:(\d+):(\w+) (\d+)/) {
140 $items{$1}{$2} = $3;
141 }
142 }
143
144 print $sock "stats slabs\r\n";
145 while (<$sock>) {
146 last if /^END/;
147 if (/^STAT (\d+):(\w+) (\d+)/) {
148 $items{$1}{$2} = $3;
149 }
150 }
151
152 print " # Item_Size Max_age 1MB_pages Full?\n";
153 foreach my $n (6..17) {
154 my $it = $items{$n};
155 my $size = $it->{chunk_size} < 1024 ? "$it->{chunk_size} B" :
156 sprintf("%d kB", $it->{chunk_size} / 1024);
157 my $full = $it->{free_chunks_end} == 0 ? "yes" : " no";
158 printf "%3d %6s%7d s %7d $full\n", $n, $size, $it->{age}, $it->{total_pages};
159 }
160