我的mysql表中目前有40万条记录。结构如下：
我正在使用的功能：
function cron_hour_counts()
{
$subids = get_subids();
array_push($subids, '');
$from = '2011-10-20';//last_updated_date('tb_hour_counts');
$to = '2011-10-20';//last_date();
$days = days_interval($from, $to);
$result_array = array();
foreach ($subids as $subid)
{
for ($i = 0; $i < $days; $i++)
{
$hour = '00:00';
for ($t = 0; $t <= 23; $t++)
{
if ($t == 0)
{
$chour = date('H:i', strtotime($hour . '+' . $t . 'hour'));
$phour = date('H:i', strtotime('23:59'));
$date = date('Y-m-d', strtotime($from . '+' . $i . 'day'));
$date_prev = date('Y-m-d', strtotime($date . '- 1 day'));
}
else
{
$chour = date('H:i', strtotime($hour . '+' . $t . 'hour'));
$phour = date('H:i', strtotime($chour . '-1 hour'));
$date = date('Y-m-d', strtotime($from . '+' . $i . 'day'));
$date_prev = $date;
}
$unique_id_query = mysql_query("SELECT (SELECT COUNT(DISTINCT `id`,`subid`) FROM `tb_stats` WHERE (`date` < '" . mysql_real_escape_string($date) . "') OR (`date` = '" . mysql_real_escape_string($date) . "' AND `time` <= '" . mysql_real_escape_string($chour) . "')" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : "") . ") - (SELECT COUNT(DISTINCT `id`,`subid`) FROM `tb_stats` WHERE (`date` < '" . mysql_real_escape_string($date_prev) . "') OR (`date` = '" . mysql_real_escape_string($date_prev) . "' AND `time` <= '" . mysql_real_escape_string($phour) . "')" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : "") . ") AS `unique_ids`");
$unique_id_result = mysql_fetch_assoc($unique_id_query);
$total_id_query = mysql_query("SELECT COUNT(DISTINCT `id`,`subid`) AS `total_ids` FROM `tb_stats` WHERE `date` = '" . mysql_real_escape_string($date) . "' AND `time` <= '" . mysql_real_escape_string($chour) . "'" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : ""));
$total_id_result = mysql_fetch_assoc($total_id_query);
$unique_ip_query = mysql_query("SELECT (SELECT COUNT(DISTINCT `ip`,`subid`) FROM `tb_stats` WHERE (`date` < '" . mysql_real_escape_string($date) . "') OR (`date` = '" . mysql_real_escape_string($date) . "' AND `time` <= '" . mysql_real_escape_string($chour) . "')" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : "") . ") - (SELECT COUNT(DISTINCT `ip`,`subid`) FROM `tb_stats` WHERE `date` <= '" . mysql_real_escape_string($date_prev) . "' AND `time` <= '" . mysql_real_escape_string($phour) . "'" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : "") . ") AS `unique_ips`");
$unique_ip_result = mysql_fetch_assoc($unique_ip_query);
$total_ip_query = mysql_query("SELECT COUNT(DISTINCT `ip`,`subid`) AS `total_ips` FROM `tb_stats` WHERE `date` = '" . mysql_real_escape_string($date) . "' AND `time` <= '" . mysql_real_escape_string($chour) . "'" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : ""));
$total_ip_result = mysql_fetch_assoc($total_ip_query);
$global_query = mysql_query("SELECT COUNT(`id`) AS `global` FROM `tb_stats` WHERE `date` = '" . mysql_real_escape_string($date) . "' AND `time` <= '" . mysql_real_escape_string($chour) . "'" . (!empty($subid) && is_numeric($subid) ? " AND `subid` = '" . mysql_real_escape_string($subid) . "'" : ""));
$global_result = mysql_fetch_assoc($global_query);
$result = array();
$result['date'] = $date;
$result['hour'] = $chour;
$result['subid'] = $subid;
$result['unique_ids'] = $unique_id_result['unique_ids'];
$result['total_ids'] = $total_id_result['total_ids'];
$result['unique_ips'] = $unique_ip_result['unique_ips'];
$result['total_ips'] = $total_ip_result['total_ips'];
$result['global'] = $global_result['global'];
$result_array[] = $result;
}
}
}
//db insert
print_r($result_array);
}
有20个辅助项，并且一天的时间需要40分钟才能执行。关于加快速度的任何提示？
最佳答案
这是我的解决方案。它的工作速度提高了20倍。
function cron_hour_counts()
{
$subids = get_subids();
//array_push($subids, '');
$from = '2011-10-20';//last_updated_date('tb_hour_counts');
$to = '2011-10-20';//last_date();
$days = days_interval($from, $to);
$result_array = array();
for ($i = 0; $i < $days; $i++)
{
$hour = '00:00';
for ($t = 0; $t <= 23; $t++)
{
$date = date('Y-m-d', strtotime($from . '+' . $i . 'day'));
$currentHour = date('H:i', strtotime($hour . '+' . $t . 'hour'));
$nextHour = date('H:i', strtotime($currentHour . '+59 minutes'));
$unique_ids_query = mysql_query("
SELECT COUNT(id) AS unique_ids,subid
FROM
(
SELECT id,subid,date,time
FROM tb_stats
WHERE date <= '" . mysql_real_escape_string($date) . "'
GROUP BY id,subid
) AS id_inner
WHERE date = '" . mysql_real_escape_string($date) . "'
AND time BETWEEN '" . mysql_real_escape_string($currentHour) . "' AND '" . mysql_real_escape_string($nextHour) . "'
GROUP BY subid;
");
pull_data('unique_ids', $date, $currentHour, $unique_ids_query, $subids, $result_array);
$unique_ips_query = mysql_query("
SELECT COUNT(ip) AS unique_ips,subid
FROM
(
SELECT ip,subid,date,time
FROM tb_stats
WHERE date <= '" . mysql_real_escape_string($date) . "'
GROUP BY ip,subid
) AS ip_inner
WHERE date = '" . mysql_real_escape_string($date) . "'
AND time BETWEEN '" . mysql_real_escape_string($currentHour) . "' AND '" . mysql_real_escape_string($nextHour) . "'
GROUP BY subid;
");
pull_data('unique_ips', $date, $currentHour, $unique_ips_query, $subids, $result_array);
$total_ids_query = mysql_query("
SELECT COUNT(DISTINCT id,subid) AS total_ids,subid
FROM tb_stats
WHERE date = '" . mysql_real_escape_string($date) . "'
AND `time` <= '" . mysql_real_escape_string($nextHour) . "'
GROUP BY subid
");
pull_data('total_ids', $date, $currentHour, $total_ids_query, $subids, $result_array);
$total_ips_query = mysql_query("
SELECT COUNT(DISTINCT ip,subid) AS total_ips,subid
FROM tb_stats
WHERE date = '" . mysql_real_escape_string($date) . "'
AND `time` <= '" . mysql_real_escape_string($nextHour) . "'
GROUP BY subid;
");
pull_data('total_ips', $date, $currentHour, $total_ips_query, $subids, $result_array);
$global_query = mysql_query("
SELECT COUNT(id) AS global,subid
FROM tb_stats
WHERE date = '" . mysql_real_escape_string($date) . "'
AND time <= '" . mysql_real_escape_string($nextHour) . "'
GROUP BY subid;
");
pull_data('global', $date, $currentHour, $global_query, $subids, $result_array);
}
}
print_r($result_array);
}
关于php - 需要加快这个PHP脚本，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/8246152/