[Koha-devel] Koha and mod perl

[Paul Poulain]

Le 27/05/2015 11:22, Gaetan Boisson a écrit :
>  Hello all,
Hello,
> has anyone set up mod perl on a koha instance? And if so, are there 
> any bugs or issues doing this?
Theory : Plack & mod_perl are using the same kind of idea to embed Perl 
(for Plack it's in specific plackup/starman process, for mod_perl it's 
in Apache itself).

The reason why mod_perl was not working well are probably the same 
reason why Plack was not working well (ie: nested sub & variable scope 
problem). They have been fixed for supporting Plack, it's not a surprise 
to me that they fixed the mod_perl problems.

It also mean that the performance improvement should also be comparable.

Question 1: what could make us face problem with Plack that does not 
appear on mod_perl ?
Question 2: why should we prefer Plack vs mod_perl ? (in the short term 
and/or in the long term)
Question 3: any side effect that we haven't found yet ?
> It seems we tried it some time ago, and this page says there are 
> issues, but doesn't give more details:
> http://wiki.koha-community.org/wiki/Koha_Tuning
>
> We have been testing it today and i haven't seen serious issues so 
> far. From the wiki it seems the latest tests were made 4 years ago, so 
> it's possible things have changed in Koha and mod_perl.
>
> It's something worth trying at any rate, because the mod perl 
> documentation claims "400% to 2000%" performance boosts. It definitely 
> feels *much* faster on our test instance right now.

-- 
Paul Poulain, Associé-gérant / co-owner
BibLibre, Services en logiciels libres pour les bibliothèques
BibLibre, Open Source software and services for libraries