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From:Larry Lowry Date:January 24 2005 4:50pm
Subject:Re: Connection performance, suggestions?
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Ok I changed my connection string to use the IP of the mySql box
and added my workstation to the hosts file on the server.  Same
problem.  The tests ran at the same slow pace.

I am really curious, what was the logic of adding the workstation
ip to the hosts file on the server?

Larry Lowry


----- Original Message ----- 
From: "Donny Simonton" <donny@stripped>
To: "'Larry Lowry'" <Larry.Lowry@stripped>; "'Peter J Milanese'" 
<PMilanese@stripped>; <mysql@stripped>
Sent: Saturday, January 22, 2005 7:34 PM
Subject: RE: Connection performance, suggestions?


> Attempt to connect to mysql via ip address, and make sure on the mysql box
> that that you add the connecting boxes to your hosts file.  Your problem
> should go away then.
>
> Donny
>
> -----Original Message-----
> From: Larry Lowry [mailto:Larry.Lowry@stripped]
> Sent: Saturday, January 22, 2005 9:25 PM
> To: Peter J Milanese; mysql@stripped
> Subject: Re: Connection performance, suggestions?
>
> Actually I was just trying to see why the same code to mySql is
> so much slower than SQL Server.  I tried the same code using the
> data provider from CoreLabs and found the connections occur
> 4 times faster than the mySQL AB connector.  The slowness
> just seems to be in the connector.
>
> Now I know my method seems silly but to my boss it makes
> sense.  We have web sites that make these connections.  They
> are obviously stateless and each makes it's own connection.
> Where it takes 22 seconds to connect to mySql 100 times I can
> in the same loop execute a select statement and bring back a
> 700k binary field adding only abour .5 seconds to the whole
> loop time.  Half a second to dig into a database with 400k
> records and yank the record 100 times but 22seconds just to
> open and close the conection.  Something just does not
> seem right.
>
> Thanks for your input.
>
> Larry Lowry
>
>
>
>
>
> ----- Original Message ----- 
> From: "Peter J Milanese" <PMilanese@stripped>
> To: "Larry Lowry" <Larry.Lowry@stripped>
> Sent: Saturday, January 22, 2005 10:22 AM
> Subject: Re: Connection performance, suggestions?
>
>
> You are not simulating. Your scripting produces 100 linear connections. 
> You
> are attempting, by theory, to simulate simultaneous connections. Big
> difference.
>
>
>
> -----------------
> Sent from my NYPL BlackBerry Handheld.
>
>
> ----- Original Message -----
> From: "Larry Lowry" [Larry.Lowry@stripped]
> Sent: 01/22/2005 10:36 AM
> To: "Peter J Milanese" <PMilanese@stripped>
> Subject: Re: Connection performance, suggestions?
>
>
> ----- Original Message ----- 
> From: "Peter J Milanese" <PMilanese@stripped>
> To: "Larry Lowry" <Larry.Lowry@stripped>; "mysql" <mysql@stripped>
> Sent: Friday, January 21, 2005 12:57 PM
> Subject: Re: Connection performance, suggestions?
>
>
>>A single transaction logs into the db several times?
> Not really. I am simulating the connection process of a bunch of
> browser based/web services transactions.
>>
>> I assume its a browser  based transaction, no?
> Correct.
>>
>> Are you limiting connections (in my.conf)? Have you tuned the config, if
>> yes how so?
>
> Here is my My.INI.
>
> [mysqld]
> basedir=C:/MySql
> datadir=D:/MySqlData
> language=C:/MySql/share/english
> port=3306
> key_buffer_size=512M
> table_cache=64
> net_buffer_length=1M
> max_allowed_packet=3M
> query_cache_limit = 1M
> query_cache_size = 32M
> query_cache_type = 1
> read_buffer_size=2M
> read_rnd_buffer_size=8M
> skip-innodb
>
> Larry
>
>
>>
>>
>> ------Original Message------
>> From: Larry Lowry
>> To: mysql
>> Sent: Jan 21, 2005 12:49 PM
>> Subject: Connection performance, suggestions?
>>
>> Before I ask this question I must state I love mySql and want to use it
>> more.
>> But I work in a shop were we mostly use SQL Server 2000.  In trying to 
>> use
>> mySql (4.12 and 4.19) we are seeing some performance issues.  I hope
>> someone can help me with this.  I am in a Windows 2003 server environment
>> and
>> running mostly asp.net applications.
>>
>> I have narrowed the problem down to the speed at which the database
>> connections
>> open and close.   The following code opens a mySql database 100 times.
>> This takes 21 to 23 seconds.  I know I should only open the connection
>> once
>> but this represents the asp environment where we are using a cluster of
>> web
>> servers.  MySQL is running on an Athlon 64 3500+ with 2 gigs of memory. 
>> It
>> is the
>> only process on the server.
>>
>> The SQL server code below does the same thing except to Sql Server 2000.
>> This
>> only takes .1 to .4 seconds.   Sql Server is running on a PIII at 1.2ghz
>> with
>> 1gb memory.  It's a crappy old box for testing.
>>
>> I am using the stock Framework 1.1 SqlClient and MySql.Data.MySqlClient
>> version  1.0.3.31712.  All test boxes are on the same network switch.
>>
>> Can anyone help explain this difference?  Is it the database engines or
>> the
>> data connectors? Any help would be appreciated.
>>
>> Thanks
>>
>> Larry Lowry
>>
>>
>> 'MySql Code
>> Dim sDBCS As String
>> = "Server=DB;UserId=userid;Password=pass;Database=images"
>> Dim i As Long
>> Dim ti As Long = Microsoft.VisualBasic.Timer()
>>
>> Dim db As MySqlConnection
>> db = New MySqlConnection(sDBCS)
>> For i = 1 To 100
>> db.Open()
>> db.Close()
>> Next
>> db.Dispose()
>> tbEnd.Text = Microsoft.VisualBasic.Timer() - ti
>>
>>
>> 'SQL Server
>> Dim sDBCS As String = "Data Source=db;User 
>> Id=userid;Password=pass;Initial
>> Catalog=images"
>> Dim i As Long
>> Dim ti As Long = Microsoft.VisualBasic.Timer()
>>
>> Dim db As SqlConnection
>> db = New SqlConnection(sDBCS)
>> For i = 1 To 100
>> db.Open()
>> db.Close()
>> Next
>> db.Dispose()
>> tbEnd.Text = Microsoft.VisualBasic.Timer() - ti
>>
>>
>> -----------------
>> Sent from my NYPL BlackBerry Handheld.
>>
>>
>>
>>
>> -- 
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>> For list archives: http://lists.mysql.com/mysql
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>>
>>
>
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Thread
Connection performance, suggestions?Larry Lowry21 Jan
Re: Connection performance, suggestions?Peter J Milanese21 Jan
  • Re: Connection performance, suggestions?Larry Lowry21 Jan
Re: Connection performance, suggestions?Larry Lowry23 Jan
  • RE: Connection performance, suggestions?Donny Simonton23 Jan
Re: Connection performance, suggestions?Larry Lowry24 Jan
  • Re: Connection performance, suggestions?Dan Nelson24 Jan