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[EP-tech] generate_views



Hi all,

This issue is also due to the need to generate citations for each item
in a browse view which can be slow, as each one can require a number of
SQL queries.  The citation caching code I describe in the
Hyperauthoship thread would like improve this significantly and was one
of the main reason I was writing it.

I have not had a chance to look at this again since I received Chris'
feedback.  When I do I will hopefully be able to provided an updated
version for people to try.  Unfortunately, this is still a long way
upstream and requires changes to the core codebase, so is not something
that will solve your problem in the short term.

Regards

David Newman



On Wed, 2019-06-05 at 19:00 +1000, Matthew Kerwin via Eprints-tech
wrote:
> We've put a lot of energy into this problem over the years. I've
> variously: overridden the default Search generation for some
> problematic views with custom SQL queries, and added a wrapper around
> the generate_views script that runs four instances in parallel (one
> for each core on our server).  It still takes a couple of hours every
> week, but it's no longer 12+ hours.
>
> I'm not at work right now to get my hands on the code.  I'll see if I
> can get to it tomorrow.
>
> Cheers
>
> On Wed, 5 Jun 2019 at 18:10, James Kerwin via Eprints-tech
> <eprints-tech at ecs.soton.ac.uk> wrote:
> >
> >
> > Hi All,
> >
> > The generate_views script runs on our EPrints server once a week
> > (early hours of Saturday morning).
> >
> > It started on Saturday and is still running now. I'm confident that
> > it's still generating views, there are just a lot of records to go
> > through. Has anybody experienced anything similar or have
> > suggestions on how I could decrease how long it takes?
> >
> > I think my main option is to get rid of some views (not too keen on
> > that) or speak to our computing services department and ask for the
> > server to be given a bit of a boost (likely to be rejected unless
> > our EPrints instance is running so slowly it goes backwards).
> >
> > I suppose I could run the script every two weeks etc. but I already
> > feel as though a week is quite a long time between the views being
> > updated. Plus a minimum of 4 days is a long time for this script to
> > be running.
> >
> > Does anybody have experience with this and any advice on what I
> > could do?
> >
> > Thanks,
> > James
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