Sorry I misspoke, I am doing updates not inserts. If I was doing
inserts I thought about the multiple record at a time idea but unless
there is something I don't know, I don't think you can do that with
updates. I will look into turning autocommit off and see what that does.
Chris W.
Andrew Carlson wrote:
> If you are doing batch inserts, either turn autocommit off, and commit
> after every so many inserts, or use the multiple values insert
> statement to insert multiple records at one time. If the inserts are
> coming from multiple sources/processes, it's a little bit of a harder
> problem.
>
> On Thu, Apr 22, 2010 at 10:13 AM, Chris W <4rfvgy7@stripped> wrote:
>
>> I have a very simple table.
>>
>> CREATE TABLE `hams`.`phoneticcallsign` (
>> `CallSign` char(6) NOT NULL,
>> `PhoneticCallSign` char(6) NOT NULL,
>> PRIMARY KEY (`CallSign`),
>> KEY `PhoneticIdx` (`PhoneticCallSign`) USING BTREE
>> )
>> I inserted a little over 1 million records with CallSign = to a value from
>> another table and PhoneticCallSign blank. Then I used the following simple
>> php script to set the value of PhoneticCallSign.
>>
>> $query = "SELECT `CallSign` \n";
>> $query .= "FROM `phoneticcallsign` \n";
>> $query .= "WHERE `PhoneticCallSign` = '' \n";
>> $result = mysql_query($query) or die("DB error $query" . mysql_error() );
>> while(($row = mysql_fetch_row($result))){
>> $CallSign = $row[0];
>> $PhoneticCallSign = SoundsLike($CallSign);
>> $query = "UPDATE `phoneticcallsign` \n";
>> $query .= "SET `PhoneticCallSign` = '$PhoneticCallSign' \n";
>> $query .= "WHERE `CallSign` = '$CallSign' \n";
>> $Uresult = mysql_query($query) or die("DB error $query" . mysql_error() );
>> }
>>
>> This was running very slow and I was getting only about 50 inserts per
>> second. I noticed that the table was InnoDB so I decided to change it to
>> MyISAM and try again. With MyISAM I was getting around 10,000 inserts per
>> second. Surely there is some way to make InnoDB faster.
>>
>> Any ideas?
>>
>> Chris W
>>
>>
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>>
>
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>
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