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IDS Forum

Re: transation logs problem

Posted By: Fernando Nunes
Date: Thursday, 22 March 2018, at 7:23 a.m.

In Response To: Re: transation logs problem (SERGIO PERES)

There is no formula. But note that by changing the parameter to a lower
value you will probably get more long transactions (or sooner).
It will not solve the issue where the logs are not enough for the DDL
changes you're doing.
The good thing is that by lowering LTXHWM and creating more space between
LTXHWM and LTXEHWM you reduce the chance of locking other transactions
while it rolls back a long TX.
By creating more space between LTXWHWM and 100 you reduce the chance of
getting into an engine locked state, or having to add additional logs to
complete the rollback.

That's why I usually suggest 30/70. If you start a long transaction at 30,
it's likely it will complete rollback before 70.
Regards.

On Thu, Mar 22, 2018 at 12:04 PM, SERGIO PERES <sergio.peres@airc.pt> wrote:

> Hi Fernando,
>
> Thanks for the information;
> I´ll try your suggestion to lower the values for LTXHWM, because on some
> servers to get bigger space for them is quite difficult.
> There is any formula/rule to estimate that size?
>
> Best regards,
>
> SP
>
>
> ************************************************************
> *******************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

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