• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: MySqlPlugin
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: MySqlPlugin

  • Subject: Re: MySqlPlugin
  • From: Jesse Tayler <email@hidden>
  • Date: Fri, 07 Mar 2014 12:15:21 -0500
did you check to make sure your database is using the index fetch plan you expect?

I recall with MySQL sometimes indexes would fail but there would be no indication until I actually reviewed the fetch internals…

something chuck would know off the top of his head I’m sure…




On Mar 7, 2014, at 12:02 PM, Robin Smith <email@hidden> wrote:

Hi All

We have been experiencing some performace issues with our DB queries that we have narrowed down to the "limitClause" applied to sql queries. It seems that out of the box MySQL uses no indexes when supplied with a LIMIT clause.

Taking this into consideration we were wondering if anything like batch fetch iterator rely on the limit clause being applied to queries or if we could safely remove (or add switch to) this part of _MySqlPlugin.

Thanks

Robin

--
Robin Smith
Engineering Team Leader  BEng (Hons) MBCS

Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden
  • Follow-Ups:
    • Re: MySqlPlugin
      • From: Robin Smith <email@hidden>
References: 
 >MySqlPlugin (From: Robin Smith <email@hidden>)

  • Prev by Date: MySqlPlugin
  • Next by Date: Re: My last WOWODC
  • Previous by thread: MySqlPlugin
  • Next by thread: Re: MySqlPlugin
  • Index(es):
    • Date
    • Thread