[Spacewalk-list] Migration from pgsql to oracle

Wed Nov 19 15:50:55 UTC 2014

Have you considered using a less drastic approach like partitioning
some of the tables and tuning the ram.
I some how doubt the single CPU core per query it the problem because
PostgreSQL is very good at handling bulk queries as opposed to lots of
queries for tiny data sets.

Here is something you can check if  a directory named
/var/lib/pgsql/data/pg_tmp exist on your system then your queries are
exceeding the allowed rem for a single query and PostgreSQL is using
that directory to essentially create swap files for queries if that is
happening you need more ram or you need to tune your PostgreSQL
server.

Here is a good place to start reading about table partitions
https://wiki.postgresql.org/wiki/Table_partitioning that with
constraint exclusion enabled in the config can help a lot with large
data sets.

On Wed, Nov 19, 2014 at 10:02 AM, Krzysztof Pawłowski
<msciciel at msciciel.eu> wrote:
> Ofcourse. But i'll will be planned propably for january. I'll give feedback
> if we encounter problems or not.
>
> 2014-11-19 15:49 GMT+01:00 Nahelou Sébastien
> <sebastien.nahelou at worldline.com>:
>>
>> Hello
>>
>>
>>
>> I’m very interesting about your migration. Could you please give your
>> feedback when your database migration will be done ?
>>
>>
>>
>> Thanks
>>
>>
>>
>> De : spacewalk-list-bounces at redhat.com
>> [mailto:spacewalk-list-bounces at redhat.com] De la part de Krzysztof Pawlowski
>> Envoyé : mercredi 19 novembre 2014 15:41
>> À : spacewalk-list at redhat.com
>> Objet : Re: [Spacewalk-list] Migration from pgsql to oracle
>>
>>
>>
>> 1. I read that oracle is performing much better in bigger spacewalk
>> deployment. I have 1600 clients connected to spacewalk and is impossible to
>> schedule tasks on all hosts. My db team said that pgsql is limited to single
>> core per connections which means that spacewalk cannot utilize db in more
>> efficient way. Maybe (I hope) i'm not aware of configuration options which
>> make this possible ?
>>
>> We have oracle support so another instance is not a problem for us. I'll
>> try test export import with db-control.
>>
>>
>>
>> 2014-11-19 12:54 GMT+01:00 Waldirio Manhães Pinheiro <waldirio at gmail.com>:
>>
>> Hello Krzysztof,
>>
>>
>>
>> I see, I've one question for you.
>>
>>
>>
>> 1. Why do you want change from postgresql to Oracle db ?!, do you have
>> Oracle support !? Just because I'm curious :-)
>>
>>
>>
>> What you can do is, build a new machine with SW and Oracle to test, export
>> from SW with postgresql using db-control and import in SW with Oracle using
>> db-control. In theory, the data model is the same changing only the sgdb, so
>> will not get problem about data.
>>
>>
>>
>> Let me know if you have any doubt about it.
>>
>>
>>
>>
>> ______________
>> Atenciosamente
>> Waldirio
>> msn: waldirio at gmail.com
>> Skype: waldirio
>> Site: www.waldirio.com.br
>> Blog: blog.waldirio.com.br
>>
>> LinkedIn: http://br.linkedin.com/pub/waldirio-pinheiro/22/b21/646
>> PGP: www.waldirio.com.br/public.html
>>
>>
>>
>> On Wed, Nov 19, 2014 at 9:20 AM, Krzysztof Pawłowski
>> <msciciel at msciciel.eu> wrote:
>>
>> I know that I can but problem is that my spacewalk has 1000+ clients and
>> is using pgsql as db backend now.
>>
>>
>>
>> 2014-11-19 12:08 GMT+01:00 Waldirio Manhães Pinheiro <waldirio at gmail.com>:
>>
>> Hello Krzysztof, good morning
>>
>>
>>
>> you can use Oracle as backend
>> (https://fedorahosted.org/spacewalk/wiki/HowToInstall#Databaseserver)
>>
>>
>>
>> B'Regards
>>
>>
>>
>>
>> ______________
>> Atenciosamente
>> Waldirio
>> msn: waldirio at gmail.com
>> Skype: waldirio
>> Site: www.waldirio.com.br
>> Blog: blog.waldirio.com.br
>>
>> LinkedIn: http://br.linkedin.com/pub/waldirio-pinheiro/22/b21/646
>> PGP: www.waldirio.com.br/public.html
>>
>>
>>
>> On Wed, Nov 19, 2014 at 7:42 AM, Krzysztof Pawłowski
>> <msciciel at msciciel.eu> wrote:
>>
>> Is there any way to switch db backend to oracle ?
>>
>>
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