今天在处理一个项目时候发现archiver单个模块归档超过百万数据，打开速度就特慢，所以打开archiver下index.php文件进行分析，发现有句sql作怪
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$result = $db->query("SELECT title,linkurl,addtime FROM {$table} WHERE $condition ORDER BY addtime DESC LIMIT $offset,$pagesize"); |
因为这sql就是查询，没有用到索引。我们思路要先查询itemid然后再用itemid进行查询，这样速度就快了。
代码如下：
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<?phpdefine('DT_REWRITE', true);require '../common.inc.php';$EXT['archiver_enable'] or dheader(DT_PATH);//$DT_BOT or dheader(DT_PATH);$N = $M = $T = array();$mid or $mid = 5;$vmid = $list = 0;foreach($MODULE as $k=>$v) { if(!$v['islink'] && $v['ismenu'] && $v['moduleid'] > 4) { if($k == $mid) $vmid = 1; $v['url'] = $DT['rewrite'] ? rewrite('index.php?mid='.$k) : '?mid-'.$k.'.html'; $N[] = $v; }}$vmid or $mid = $N[0]['moduleid'];$table = get_table($mid);$t = $db->get_one("SELECT MIN(addtime) AS mintime,MAX(addtime) AS maxtime FROM {$table}", 'CACHE');$fromtime = $t['mintime'];$fromyear = timetodate($fromtime, 'Y');if($fromyear < 1990) $fromyear = 1990;$frommonth = timetodate($fromtime, 'n');$totime = $t['maxtime'] > $DT_TIME ? $DT_TIME : $t['maxtime'];$toyear = timetodate($totime, 'Y');$tomonth = timetodate($totime, 'n');for($i = $toyear; $i >= $fromyear; $i--) { for($j = ($i == $toyear ? $tomonth : 12); $j >= ($i == $fromyear ? $frommonth : 1); $j--) { $r = array(); $r['title'] = $MODULE[$mid]['name'].$i.'年'.($j < 10 ? '0' : '').$j.'月归档'; $r['month'] = $i.($j < 10 ? '0' : '').$j; $r['url'] = $DT['rewrite'] ? rewrite('index.php?mid='.$mid.'&month='.$r['month']) : '?mid-'.$mid.'-month-'.$r['month'].'.html'; $M[$r['month']] = $r; }}$head_title = $MODULE[$mid]['name'].'归档';if(isset($month) && isset($M[$month])) { $list = 1; $y = substr($month, 0, 4); $m = substr($month, 4, 2); $ym = $y.'-'.$m; $t = timetodate(datetotime($ym.'-01'), 't'); $ftime = datetotime($ym.'-01 00:00:00'); $ttime = datetotime($ym.'-'.$t.' 23:59:59'); $condition = "addtime>$ftime AND addtime<$ttime"; $num = $db->count($table, $condition, $CFG['db_expires']); $demo_url = $DT['rewrite'] ? rewrite($MODULE[1]['linkurl'].'archiver/index.php?mid='.$mid.'&month='.$month.'&page={destoon_page}') : '?mid-'.$mid.'-month-'.$month.'-page-{destoon_page}.html'; $pages = pages($num, $page, $pagesize, $demo_url); $tmp = explode('<input type="text"', $pages); $pages = $tmp[0]; if($num) { //优化查询速度 //$result = $db->query("SELECT title,linkurl,addtime FROM {$table} WHERE $condition ORDER BY addtime DESC LIMIT $offset,$pagesize"); $reitemid = $db->query("SELECT itemid FROM {$table} WHERE $condition ORDER BY addtime DESC LIMIT $offset,$pagesize"); //echo "SELECT itemid FROM {$table} WHERE $condition ORDER BY addtime DESC LIMIT $offset,$pagesize"; while($rid = $db->fetch_array($reitemid)) { $getid.=$rid['itemid'].","; } $getid=mb_substr($getid,0,-1); //判断是否在里面 $result=$db->query("SELECT title,linkurl,addtime FROM {$table} WHERE itemid in ($getid)"); while($r = $db->fetch_array($result)) { $r['adddate'] = timetodate($r['addtime'], 5); if(strpos($r['linkurl'], '://') === false) $r['linkurl'] = $MODULE[$mid]['linkurl'].$r['linkurl']; $T[] = $r; } } $head_title = $MODULE[$mid]['name'].$y.'年'.$m.'月归档'.($page > 1 ? '第'.$page.'页' : '');}include template('archiver', 'extend');?> |