[Koha-bugs] [Bug 26457] DB DeadLock when renewing checkout items

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26457

--- Comment #4 from David Cook <dcook at prosentient.com.au> ---
(In reply to didier from comment #3)
> It's also our analysis, there's redundant indexes on issues which may on may
> not compound the problem.
>  PRIMARY KEY (`issue_id`),
>   UNIQUE KEY `itemnumber` (`itemnumber`),
>   KEY `issuesborridx` (`borrowernumber`),
>   KEY `itemnumber_idx` (`itemnumber`),
>   KEY `branchcode_idx` (`branchcode`),
>   KEY `bordate` (`borrowernumber`,`timestamp`),
> 
> itemnumber_idx  and issuesborridx are redundant.

I doubt that the indexes compound the problem, but I suppose more investigation
would be needed.

I see that itemnumber_idx is redundant, but how is issuesborridx redundant?
It's not the same as bordate. 

> I'll try, maybe adding a fat sleep(5) in transaction block.

Certainly worth experimenting.

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