複製MySQL數據庫加速？

我那裏有超過3000萬行的mysql數據庫，但一些行（適當地300萬美元）的重複的我用下面的PHP腳本複製數據庫和重複檢查，但它的運行速度非常慢的拍攝3天，甚至還沒有完成，有沒有加快速度？我在MySql服務器本身上運行腳本。複製MySQL數據庫加速？

<?php 

$dbhost = "localhost" ; 


$con = mysql_connect("$dbhost","$dbuser","$dbpass"); 
if (!$con) 
    { 
    die('Could not connect: ' . mysql_error()); 
    } 

mysql_select_db("$dbame", $con); 

$server_self = $_SERVER['PHP_SELF']; 
$rows_per_page = 1000; 
$dbname_var = post1; 




//paging script 
$query = "SELECT count(*) FROM $dbname_var";   //change!! 
//paging script 



//PAGING SCRIPT 
if (isset($_GET['pageno'])) { 
    $pageno = $_GET['pageno']; 
} else { 
    $pageno = 1; 
} // if 


$resulta = mysql_query($query) or trigger_error("SQL", E_USER_ERROR); 
$query_data = mysql_fetch_row($resulta); 



$numrows = $query_data[0]; 
$lastpage  = ceil($numrows/$rows_per_page); 

$pageno = (int)$pageno; 
if ($pageno > $lastpage) { 
    $pageno = $lastpage; 
} // if 
if ($pageno < 1) { 
    $pageno = 1; 
} // if 

$limit = 'LIMIT ' .($pageno - 1) * $rows_per_page .',' .$rows_per_page; 
$nextpage = $pageno+1; 
$prevpage = $pageno-1; 







$result = mysql_query("SELECT * FROM $dbname_var $limit"); 
while($row = mysql_fetch_array($result)) { 


$as = $row[1]; 
$ad = $row[2]; 
$af = $row[10]; 

//CHECK IF THE ROW ALREADY EXISTS IN THE TABLE 
$resultdb1 = mysql_query("SELECT * FROM post_final WHERE 
add1='$as' AND 
add2='$ad' AND 
add10='$af'"); 

$num_rowsdb1 = mysql_num_rows($resultdb1); 

//IF IT DOSENT ADD IT! 
if($num_rowsdb1 < 1) { 

mysql_query("INSERT INTO post_final (add1, 
add2, 
add3, 
add4, 
add5, 
add6, 
add7, 
add8, 
add9, 
add10) 
VALUES ('$row[1]', 
'$row[2]', 
'$row[3]', 
'$row[4]', 
'$row[5]', 
'$row[6]', 
'$row[7]', 
'$row[8]', 
'$row[9]', 
'$row[10]')"); 
} } 







$nxt = $_GET['pageno'] + 1; 



if ($_GET['pageno'] < $lastpage) { 

print "<BODY> 
<script type=\"text/javascript\"> 
<!-- 
window.location = \"/addnew.php?pageno=$nxt&lastpage=$lastpage\" 
//--> 
</script> 
</BODY> 
</HTML>\n"; } 

?> 

# Column Type Collation Attributes Null Default Extra Action 
1 ID int(10)   No None AUTO_INCREMENT Change  Drop More 
2 add1 varchar(50) latin1_german2_ci  No None   Change  Drop More 
3 add2 varchar(50) latin1_german2_ci  No None   Change  Drop More 
4 add3 varchar(50) latin1_german2_ci  No None   Change  Drop More 
5 add4 varchar(50) latin1_german2_ci  No None   Change  Drop More 
6 add5 varchar(50) latin1_german2_ci  No None   Change  Drop More 
7 add6 varchar(50) latin1_german2_ci  No None   Change  Drop More 
8 add7 varchar(50) latin1_german2_ci  No None   Change  Drop More 
9 add8 varchar(50) latin1_german2_ci  No None   Change  Drop More 
10 add9 varchar(50) latin1_german2_ci  No None   Change  Drop More 
11 add10 varchar(50) latin1_german2_ci  No None   Change  Drop More 

Action Keyname Type Unique Packed Column Cardinality Collation Null Comment 
Edit Drop PRIMARY BTREE Yes No ID 10044279 A  
Edit Drop add10 BTREE No No add10 590839 A  
Edit Drop add1 BTREE No No add1 264323 A  
Edit Drop add2 BTREE No No add2 233587 A

來源

2012-02-28 Cookiimonstar

準備語句進行插入會有所幫助。但我想這可以用普通的SQL來完成。 – Rufinus 2012-02-28 16:44:05

您應該做的第一件事就是不要每1000條記錄使用一次瀏覽器請求。第二件事是弄清楚如何在每條記錄上單獨執行查詢。 – horatio 2012-02-28 16:52:51

只使用SQL，不需要在SQL和PHP之間來回採用數據。假設你有一個數據庫db1與表post_final，創建數據庫db2創建空post_final表，並做

INSERT INTO `db2`.`post_final` (add1, add2, ...., add10) 
SELECT DISTINCT add1, add2, ... , add10 FROM `db1`.`post_final`

來源

2012-02-28 16:48:48 scibuff

複製MySQL數據庫加速？

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