php显示memcache状态(nginx+php fastcgi)

#开始前删除相关程序 yum remove httpd* php* #添加php53源 wget http://dl.iuscommunity.org/pub/ius/stable/CentOS/5/x86_64/epel-release-5-4.noarch.rpm wget http://dl.iuscommunity.org/pub/ius/stable/CentOS/5/x86_64/ius-release-1.0-11.ius.centos5.noarch.rpm rpm -Uvh epel-release-5-4.noarch.rpm rpm -Uvh ius-release-1.0-11.ius.centos5.noarch.rpm #安装php53u等…… yum install php53u php53u-pecl-memcache chkconfig --level 345 php-fpm on /etc/init.d/php-fpm restart #修改/usr/local/nginx/conf/fastcgi_params文件添加一行 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; #修改/etc/php-fpm.d/www.conf 文件用户和组与nginx相同 ; RPM: apache Choosed to be able to access some dir as httpd user = www ; RPM: Keep a group allowed to write in log dir. group = www #在需要解析php的server下添加location location ~ .*\.php$ { # root /var/www/html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name; #/var/www/html可以写成$document_root相当如上面root的部分 include fastcgi_params; }

附上memcache.php

                       |
  +----------------------------------------------------------------------+
*/

$VERSION='$Id: memcache.php,v 1.1.2.3 2008/08/28 18:07:54 mikl Exp $';

define('ADMIN_USERNAME','memcache');    // Admin Username
define('ADMIN_PASSWORD','password');    // Admin Password
define('DATE_FORMAT','Y/m/d H:i:s');
define('GRAPH_SIZE',200);
define('MAX_ITEM_DUMP',50);

$MEMCACHE_SERVERS[] = '192.168.100.70:11211'; // add more as an array
//$MEMCACHE_SERVERS[] = 'mymemcache-server2:11211'; // add more as an array


// END OF DEFAULT CONFIG AREA /

/ Password protect 
if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW']) ||
           $_SERVER['PHP_AUTH_USER'] != ADMIN_USERNAME ||$_SERVER['PHP_AUTH_PW'] != ADMIN_PASSWORD) {
                        Header("WWW-Authenticate: Basic realm=\"Memcache Login\"");
                        Header("HTTP/1.0 401 Unauthorized");

                        echo <<
                                
Rejected!
                                Wrong Username or Password!
                                
EOB;
exit;
}
///MEMCACHE FUNCTIONS /
function sendMemcacheCommands($command){
global $MEMCACHE_SERVERS;
$result = array();
foreach($MEMCACHE_SERVERS as $server){
$strs = explode(':',$server);
$host = $strs[0];
$port = $strs[1];
$result[$server] = sendMemcacheCommand($host,$port,$command);
}
return $result;
}
function sendMemcacheCommand($server,$port,$command){
$s = @fsockopen($server,$port);
if (!$s){
die("Cant connect to:".$server.':'.$port);
}
fwrite($s, $command."\r\n");
$buf='';
while ((!feof($s))) {
$buf .= fgets($s, 256);
if (strpos($buf,"END\r\n")!==false){ // stat says end
break;
}
if (strpos($buf,"DELETED\r\n")!==false || strpos($buf,"NOT_FOUND\r\n")!==false){ // delete says these
break;
}
if (strpos($buf,"OK\r\n")!==false){ // flush_all says ok
break;
}
}
fclose($s);
return parseMemcacheResults($buf);
}
function parseMemcacheResults($str){
$res = array();
$lines = explode("\r\n",$str);
$cnt = count($lines);
for($i=0; $i< $cnt; $i++){
$line = $lines[$i];
$l = explode(' ',$line,3);
if (count($l)==3){
$res[$l[0]][$l[1]]=$l[2];
if ($l[0]=='VALUE'){ // next line is the value
$res[$l[0]][$l[1]] = array();
list ($flag,$size)=explode(' ',$l[2]);
$res[$l[0]][$l[1]]['stat']=array('flag'=>$flag,'size'=>$size);
$res[$l[0]][$l[1]]['value']=$lines[++$i];
}
}elseif($line=='DELETED' || $line=='NOT_FOUND' || $line=='OK'){
return $line;
}
}
return $res;
}
function dumpCacheSlab($server,$slabId,$limit){
list($host,$port) = explode(':',$server);
$resp = sendMemcacheCommand($host,$port,'stats cachedump '.$slabId.' '.$limit);
return $resp;
}
function flushServer($server){
list($host,$port) = explode(':',$server);
$resp = sendMemcacheCommand($host,$port,'flush_all');
return $resp;
}
function getCacheItems(){
$items = sendMemcacheCommands('stats items');
$serverItems = array();
$totalItems = array();
foreach ($items as $server=>$itemlist){
$serverItems[$server] = array();
$totalItems[$server]=0;
if (!isset($itemlist['STAT'])){
continue;
}
$iteminfo = $itemlist['STAT'];
foreach($iteminfo as $keyinfo=>$value){
if (preg_match('/items\:(\d+?)\:(.+?)$/',$keyinfo,$matches)){
$serverItems[$server][$matches[1]][$matches[2]] = $value;
if ($matches[2]=='number'){
$totalItems[$server] +=$value;
}
}
}
}
return array('items'=>$serverItems,'counts'=>$totalItems);
}
function getMemcacheStats($total=true){
$resp = sendMemcacheCommands('stats');
if ($total){
$res = array();
foreach($resp as $server=>$r){
foreach($r['STAT'] as $key=>$row){
if (!isset($res[$key])){
$res[$key]=null;
}
switch ($key){
case 'pid':
$res['pid'][$server]=$row;
break;
case 'uptime':
$res['uptime'][$server]=$row;
break;
case 'time':
$res['time'][$server]=$row;
break;
case 'version':
$res['version'][$server]=$row;
break;
case 'pointer_size':
$res['pointer_size'][$server]=$row;
break;
case 'rusage_user':
$res['rusage_user'][$server]=$row;
break;
case 'rusage_system':
$res['rusage_system'][$server]=$row;
break;
case 'curr_items':
$res['curr_items']+=$row;
break;
case 'total_items':
$res['total_items']+=$row;
break;
case 'bytes':
$res['bytes']+=$row;
break;
case 'curr_connections':
$res['curr_connections']+=$row;
break;
case 'total_connections':
$res['total_connections']+=$row;
break;
case 'connection_structures':
$res['connection_structures']+=$row;
break;
case 'cmd_get':
$res['cmd_get']+=$row;
break;
case 'cmd_set':
$res['cmd_set']+=$row;
break;
case 'get_hits':
$res['get_hits']+=$row;
break;
case 'get_misses':
$res['get_misses']+=$row;
break;
case 'evictions':
$res['evictions']+=$row;
break;
case 'bytes_read':
$res['bytes_read']+=$row;
break;
case 'bytes_written':
$res['bytes_written']+=$row;
break;
case 'limit_maxbytes':
$res['limit_maxbytes']+=$row;
break;
case 'threads':
$res['rusage_system'][$server]=$row;
break;
}
}
}
return $res;
}
return $resp;
}
//
//
// don't cache this page
//
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0
function duration($ts) {
global $time;
$years = (int)((($time - $ts)/(7*86400))/52.177457);
$rem = (int)(($time-$ts)-($years * 52.177457 * 7 * 86400));
$weeks = (int)(($rem)/(7*86400));
$days = (int)(($rem)/86400) - $weeks*7;
$hours = (int)(($rem)/3600) - $days*24 - $weeks*7*24;
$mins = (int)(($rem)/60) - $hours*60 - $days*24*60 - $weeks*7*24*60;
$str = '';
if($years==1) $str .= "$years year, ";
if($years>1) $str .= "$years years, ";
if($weeks==1) $str .= "$weeks week, ";
if($weeks>1) $str .= "$weeks weeks, ";
if($days==1) $str .= "$days day,";
if($days>1) $str .= "$days days,";
if($hours == 1) $str .= " $hours hour and";
if($hours>1) $str .= " $hours hours and";
if($mins == 1) $str .= " 1 minute";
else $str .= " $mins minutes";
return $str;
}
// create graphics
//
function graphics_avail() {
return extension_loaded('gd');
}
function bsize($s) {
foreach (array('','K','M','G') as $i => $k) {
if ($s < 1024) break;
$s/=1024;
}
return sprintf("%5.1f %sBytes",$s,$k);
}
// create menu entry
function menu_entry($ob,$title) {
global $PHP_SELF;
if ($ob==$_GET['op']){
return "
$title
";
}
return "
$title
";
}
function getHeader(){
$header = <<







memcache
memcache.php by Harun Yayli




EOB;
return $header;
}
function getFooter(){
global $VERSION;
$footer = '

';
return $footer;
}
function getMenu(){
global $PHP_SELF;
echo "
";
if ($_GET['op']!=4){
echo <<Refresh Data
EOB;
}
else {
echo <<Back
EOB;
}
echo
menu_entry(1,'View Host Stats'),
menu_entry(2,'Variables');
echo <<


EOB;
}
// TODO, AUTH
$_GET['op'] = !isset($_GET['op'])? '1':$_GET['op'];
$PHP_SELF= isset($_SERVER['PHP_SELF']) ? htmlentities(strip_tags($_SERVER['PHP_SELF'],'')) : '';
$PHP_SELF=$PHP_SELF.'?';
$time = time();
// sanitize _GET
foreach($_GET as $key=>$g){
$_GET[$key]=htmlentities($g);
}
// singleout
// when singleout is set, it only gives details for that server.
if (isset($_GET['singleout']) && $_GET['singleout']>=0 && $_GET['singleout'] $y) imagefilledrectangle($im, $x, $y, $x1, $y1, $color2);
else imagefilledrectangle($im, $x, $y1, $x1, $y, $color2);
imagerectangle($im, $x, $y1, $x1, $y, $color1);
if ($text) {
if ($placeindex>0) {
if ($placeindex<16)
{
$px=5;
$py=$placeindex*12+6;
imagefilledrectangle($im, $px+90, $py+3, $px+90-4, $py-3, $color2);
imageline($im,$x,$y+$h/2,$px+90,$py,$color2);
imagestring($im,2,$px,$py-6,$text,$color1);
} else {
if ($placeindex<31) {
$px=$x+40*2;
$py=($placeindex-15)*12+6;
} else {
$px=$x+40*2+100*intval(($placeindex-15)/15);
$py=($placeindex%15)*12+6;
}
imagefilledrectangle($im, $px, $py+3, $px-4, $py-3, $color2);
imageline($im,$x+$w,$y+$h/2,$px,$py,$color2);
imagestring($im,2,$px+2,$py-6,$text,$color1);
}
} else {
imagestring($im,4,$x+5,$y1-16,$text,$color1);
}
}
}
function fill_arc($im, $centerX, $centerY, $diameter, $start, $end, $color1,$color2,$text='',$placeindex=0) {
$r=$diameter/2;
$w=deg2rad((360+$start+($end-$start)/2)%360);
if (function_exists("imagefilledarc")) {
// exists only if GD 2.0.1 is avaliable
imagefilledarc($im, $centerX+1, $centerY+1, $diameter, $diameter, $start, $end, $color1, IMG_ARC_PIE);
imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2, IMG_ARC_PIE);
imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color1, IMG_ARC_NOFILL|IMG_ARC_EDGED);
} else {
imagearc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2);
imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2);
imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start+1)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2);
imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end-1)) * $r, $centerY + sin(deg2rad($end)) * $r, $color2);
imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end)) * $r, $centerY + sin(deg2rad($end)) * $r, $color2);
imagefill($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2, $color2);
}
if ($text) {
if ($placeindex>0) {
imageline($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$diameter, $placeindex*12,$color1);
imagestring($im,4,$diameter, $placeindex*12,$text,$color1);
} else {
imagestring($im,4,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$text,$color1);
}
}
}
$size = GRAPH_SIZE; // image size
$image = imagecreate($size+50, $size+10);
$col_white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
$col_red = imagecolorallocate($image, 0xD0, 0x60, 0x30);
$col_green = imagecolorallocate($image, 0x60, 0xF0, 0x60);
$col_black = imagecolorallocate($image, 0, 0, 0);
imagecolortransparent($image,$col_white);
switch ($_GET['IMG']){
case 1: // pie chart
$tsize=$memcacheStats['limit_maxbytes'];
$avail=$tsize-$memcacheStats['bytes'];
$x=$y=$size/2;
$angle_from = 0;
$fuzz = 0.000001;
foreach($memcacheStatsSingle as $serv=>$mcs) {
$free = $mcs['STAT']['limit_maxbytes']-$mcs['STAT']['bytes'];
$used = $mcs['STAT']['bytes'];
if ($free>0){
// draw free
$angle_to = ($free*360)/$tsize;
$perc =sprintf("%.2f%%", ($free *100) / $tsize) ;
fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_green,$perc);
$angle_from = $angle_from + $angle_to ;
}
if ($used>0){
// draw used
$angle_to = ($used*360)/$tsize;
$perc =sprintf("%.2f%%", ($used *100) / $tsize) ;
fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_red, '('.$perc.')' );
$angle_from = $angle_from+ $angle_to ;
}
}
break;
case 2: // hit miss
$hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits'];
$misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses'];
$total = $hits + $misses ;
fill_box($image, 30,$size,50,-$hits*($size-21)/$total,$col_black,$col_green,sprintf("%.1f%%",$hits*100/$total));
fill_box($image,130,$size,50,-max(4,($total-$hits)*($size-21)/$total),$col_black,$col_red,sprintf("%.1f%%",$misses*100/$total));
break;
}
header("Content-type: image/png");
imagepng($image);
exit;
}
echo getHeader();
echo getMenu();
switch ($_GET['op']) {
case 1: // host stats
$phpversion = phpversion();
$memcacheStats = getMemcacheStats();
$memcacheStatsSingle = getMemcacheStats(false);
$mem_size = $memcacheStats['limit_maxbytes'];
$mem_used = $memcacheStats['bytes'];
$mem_avail= $mem_size-$mem_used;
$startTime = time()-array_sum($memcacheStats['uptime']);
$curr_items = $memcacheStats['curr_items'];
$total_items = $memcacheStats['total_items'];
$hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits'];
$misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses'];
$sets = $memcacheStats['cmd_set'];
$req_rate = sprintf("%.2f",($hits+$misses)/($time-$startTime));
$hit_rate = sprintf("%.2f",($hits)/($time-$startTime));
$miss_rate = sprintf("%.2f",($misses)/($time-$startTime));
$set_rate = sprintf("%.2f",($sets)/($time-$startTime));
echo <<< EOB
General Cache Information

EOB;
echo "\n";
echo "\n";
echo <<

PHP Version
$phpversion
Memcached Host". ((count($MEMCACHE_SERVERS)>1) ? 's':'')."
";
$i=0;
if (!isset($_GET['singleout']) && count($MEMCACHE_SERVERS)>1){
foreach($MEMCACHE_SERVERS as $server){
echo ($i+1).'. '.$server.'
';
}
}
else{
echo '1.'.$MEMCACHE_SERVERS[0];
}
if (isset($_GET['singleout'])){
echo '(all servers)
';
}
echo "
Total Memcache Cache
".bsize($memcacheStats['limit_maxbytes'])."

Memcache Server Information
EOB;
foreach($MEMCACHE_SERVERS as $server){
echo '';
echo '';
echo '';
echo '';
echo '';
echo '';
echo '';
echo '
'.$server.'
[Flush this server]
Start Time
',date(DATE_FORMAT,$memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Uptime
',duration($memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Memcached Server Version
'.$memcacheStatsSingle[$server]['STAT']['version'].'
Used Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['bytes']),'
Total Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['limit_maxbytes']),'
';
}
echo <<
Host Status Diagrams

EOB;
$size='width='.(GRAPH_SIZE+50).' height='.(GRAPH_SIZE+10);
echo <<

EOB;
echo
graphics_avail() ?
''.
"".
"\n"
: "",
'',
'\n",
'\n",
'',
'',
'\n",
'\n";
echo <<< EOB
Cache Usage
Hits & Misses
 Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"
 Hits: ',$hits.sprintf(" (%.1f%%)",$hits*100/($hits+$misses)),"
 Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"
 Misses: ',$misses.sprintf(" (%.1f%%)",$misses*100/($hits+$misses)),"



Cache Information

Current Items(total)
$curr_items ($total_items)
Hits
{$hits}
Misses
{$misses}
Request Rate (hits, misses)
$req_rate cache requests/second
Hit Rate
$hit_rate cache requests/second
Miss Rate
$miss_rate cache requests/second
Set Rate
$set_rate cache requests/second


EOB;
break;
case 2: // variables
$m=0;
$cacheItems= getCacheItems();
$items = $cacheItems['items'];
$totals = $cacheItems['counts'];
$maxDump = MAX_ITEM_DUMP;
foreach($items as $server => $entries) {
echo <<< EOB

EOB;
foreach($entries as $slabId => $slab) {
$dumpUrl = $PHP_SELF.'&op=2&server='.(array_search($server,$MEMCACHE_SERVERS)).'&dumpslab='.$slabId;
echo
"",
"",
"";
$m=1-$m;
}
echo <<

$server
Slab Id
Info
",'',$slabId,'',"
Item count: ",$slab['number'],'
Age:',duration($time-$slab['age']),'
 Evicted:',((isset($slab['evicted']) && $slab['evicted']==1)? 'Yes':'No');
if ((isset($_GET['dumpslab']) && $_GET['dumpslab']==$slabId) && (isset($_GET['server']) && $_GET['server']==array_search($server,$MEMCACHE_SERVERS))){
echo "
Items: item
";
$items = dumpCacheSlab($server,$slabId,$slab['number']);
// maybe someone likes to do a pagination here :)
$i=1;
foreach($items['ITEM'] as $itemKey=>$itemInfo){
$itemInfo = trim($itemInfo,'[ ]');
echo '',$itemKey,'';
if ($i++ % 10 == 0) {
echo '
';
}
elseif ($i!=$slab['number']+1){
echo ',';
}
}
}
echo "

EOB;
}
break;
break;
case 4: //item dump
if (!isset($_GET['key']) || !isset($_GET['server'])){
echo "No key set!";
break;
}
// I'm not doing anything to check the validity of the key string.
// probably an exploit can be written to delete all the files in key=base64_encode("\n\r delete all").
// somebody has to do a fix to this.
$theKey = htmlentities(base64_decode($_GET['key']));
$theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];
list($h,$p) = explode(':',$theserver);
$r = sendMemcacheCommand($h,$p,'get '.$theKey);
echo <<
EOB;
echo "",
'","";
echo <<

Server
Key
Value
Delete
",$theserver,"
",$theKey,
" 
flag:",$r['VALUE'][$theKey]['stat']['flag'],
" 
Size:",bsize($r['VALUE'][$theKey]['stat']['size']),
"
",chunk_split($r['VALUE'][$theKey]['value'],40),"
Delete

EOB;
break;
case 5: // item delete
if (!isset($_GET['key']) || !isset($_GET['server'])){
echo "No key set!";
break;
}
$theKey = htmlentities(base64_decode($_GET['key']));
$theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];
list($h,$p) = explode(':',$theserver);
$r = sendMemcacheCommand($h,$p,'delete '.$theKey);
echo 'Deleting '.$theKey.':'.$r;
break;
case 6: // flush server
$theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];
$r = flushServer($theserver);
echo 'Flush '.$theserver.":".$r;
break;
}
echo getFooter();
?>

说了这么多，简要总结如下： 

• Memcached的Key，要杜绝使用空格，且长度控制在250个字符。
• Memcached的Value，要控制体积，必须小于1MB，必要时进行使用压缩。
• 失效时间，0为永久有效，最大值不得超过30天（2592000s），否则重新计算可能缓存只有1秒
• Memcached仅支持LRU算法，完全适用你的需要。
• 尽量不要将List这种重体积对象扔到Memcached中，传输、存储都会产生瓶颈。
• 使用一致性哈希算法实现，提高多个Memcacehd Server利用率。

如何应对高并发： 应对高并发攻击

获取运行状态
echo stats | nc 192.168.1.123 11200
watch "echo stats | nc 192.168.1.123 11200" (实时状态)