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From:<vpendleton Date:March 2 2004 6:17pm
Subject:Re: no one can log on any more
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When the queries in question are running, what does top look like? With 
an insert that large it may be beneficial to disable any keys that may be 
active on the target table and re-enable them after the data has been loaded.

>>>>>>>>>>>>>>>>>> Original Message
> <<<<<<<<<<<<<<<<<<

On 3/2/04, 12:08:05 PM, Bernd Jagla <jaglab@stripped> wrote regarding Re: 
no one can log on any more:


> An explain on the select statements reveals that no index is used and 
that
> all 133856002 rows are searched.

> Do you think that using a new index would make much of difference?
> I think it has something to do with some system/mysql parameters that can 
be
> adjusted.
> I also don't understand why no one else can log on to the mysql system.

> If you or someone could explain or point me to a documentation on this it
> would be pretty close to what I want.

> Thanks for your help

> Bernd

> ----- Original Message -----
> From: <vpendleton@stripped>
> To: "Bernd Jagla" <jaglab@stripped>
> Cc: "mysql" <mysql@stripped>
> Sent: Tuesday, March 02, 2004 1:02 PM
> Subject: Re: no one can log on any more


> What does the explain plan reveal?

> >>>>>>>>>>>>>>>>>> Original
> Message <<<<<<<<<<<<<<<<<<

> On 3/2/04, 9:05:17 AM, Bernd Jagla <jaglab@stripped> wrote regarding no
> one can log on any more:


> > Hi there,

> > I have some weird sql statements that seem to eat up all resources from
> > mysqld.
> > Once I have two of them running at the same time no one can log on any
> > more. Simple queries involving distinct get a out of memory error.

> > We have tried changing the index buffer size from 256M to 2G, no change.
> > We have 7G of memory on an IRIX system with 8 cpus.
> > No replication.

> > Do you have any idea what is happening?

> > Thanks a lot

> > Bernd


> > the sql statements look like this:

> > insert into rule2
> > select id
> > from text_uniq_bin
> > where (substring(rev_rep,1,1)="1") AND
> > (
> > substring(replaced,1,1) +
> > substring(replaced,2,1) +
> > substring(replaced,3,1) +
> > substring(replaced,4,1) +
> > substring(replaced,5,1) +
> > substring(replaced,6,1) +
> > substring(replaced,7,1) +
> > substring(replaced,8,1) +
> > substring(replaced,9,1)
> > ) >2 AND
> > (substring(replaced,3,1)="0") AND
> > (
> > substring(replaced,12,1) +
> > substring(replaced,13,1) +
> > substring(replaced,14,1) +
> > substring(replaced,15,1) +
> > substring(replaced,16,1) +
> > substring(replaced,17,1) +
> > substring(replaced,18,1) +
> > substring(replaced,19,1)
> > ) >5
> > ;

> > AND

> > insert into rule3
> > select id
> > from text_uniq_bin
> > where (substring(rev_rep,1,1)="1") AND
> > (
> > substring(replaced,1,1) +
> > substring(replaced,2,1) +
> > substring(replaced,3,1) +
> > substring(replaced,4,1) +
> > substring(replaced,5,1) +
> > substring(replaced,6,1) +
> > substring(replaced,7,1) +
> > substring(replaced,8,1) +
> > substring(replaced,9,1)
> > ) >2 AND
> > (substring(rev_rep,3,1)="0") AND
> > (
> > substring(replaced,12,1) +
> > substring(replaced,13,1) +
> > substring(replaced,14,1) +
> > substring(replaced,15,1) +
> > substring(replaced,16,1) +
> > substring(replaced,17,1) +
> > substring(replaced,18,1) +
> > substring(replaced,19,1)
> > ) <=5 AND
> > (substring(rev_rep,2,1)="0") AND
> > (
> > substring(replaced,6,1) +
> > substring(replaced,7,1) +
> > substring(replaced,8,1) +
> > substring(replaced,9,1) +
> > substring(replaced,10,1) +
> > substring(replaced,11,1) +
> > substring(replaced,12,1) +
> > substring(replaced,13,1) +
> > substring(replaced,14,1) +
> > substring(replaced,15,1) +
> > substring(replaced,16,1) +
> > substring(replaced,17,1) +
> > substring(replaced,18,1) +
> > substring(replaced,19,1)
> > ) >7
Thread
no one can log on any moreBernd Jagla2 Mar
  • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreMartijn Tonies2 Mar
  • Re: no one can log on any moreBernd Jagla2 Mar
    • Re: no one can log on any morevpendleton2 Mar
  • Re: no one can log on any moreSasha Pachev2 Mar