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From:Markus Falb Date:October 12 2012 1:39pm
Subject:Re: innodb_lock_wait_timeout
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On 11.10.2012 14:43, Johan De Meersman wrote:
> ----- Original Message -----
>> From: "Markus Falb" <markus.falb@stripped>
>> But why is retrying better than raising the value?
>> So what is better, adjusting the timeout or retrying application side
>> and why?
> Well, raising the timeout would probably help, but may cause more concurrent
> connections to stay open until they block the server.
> The idea of retrying is that everything you've done before that particular
> transaction has already been committed, so you (probably) can't easily undo it. A retry
> gives you a chance to still finish what you were doing with no other loss than some time
> waiting. Regardless of how many retries fail, you will still be in the same position as
> you were when the first attempt failed.

With a low timeout the connection will be terminated sooner, but if the
application retries another connection is taken. I could have raised the
timeout with the same effect on the db side (1 process is waiting) but
maybe more performant (no new connection necessary) and with simpler
logic on the application side (no retry logic)

Maybe you imply that there is some kind of sleep before the retry, so
that other statements could be fulfilled?

I still don't get it.
Kind Regards, Markus Falb

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innodb_lock_wait_timeoutMarkus Falb11 Oct
  • Re: innodb_lock_wait_timeoutJohan De Meersman11 Oct
    • Re: innodb_lock_wait_timeoutAndrĂ©s Tello11 Oct
      • Re: innodb_lock_wait_timeoutAkshay Suryavanshi11 Oct
        • RE: innodb_lock_wait_timeoutRick James11 Oct
    • Re: innodb_lock_wait_timeoutMarkus Falb12 Oct
      • Re: innodb_lock_wait_timeoutReindl Harald12 Oct
        • Re: innodb_lock_wait_timeoutMichael Dykman12 Oct
      • Re: innodb_lock_wait_timeoutJohan De Meersman15 Oct
  • Re: innodb_lock_wait_timeoutPerrin Harkins11 Oct
Re: innodb_lock_wait_timeoutJohan De Meersman15 Oct