Re: copy and postgresql.conf - Mailing list pgsql-performance

i'm using Solaris8
i tried changing only postgresql parameters
and time has increased of 10mn

i keep in mind your idea, we will soon upgraded to solaris 10

regards

    Will

-----Message d'origine-----
De : J.K.Shah@Sun.COM [mailto:J.K.Shah@Sun.COM]
Envoyé : mardi 14 février 2006 22:47
À : FERREIRA, William (VALTECH)
Cc : Albert Cervera Areny; pgsql-performance@postgresql.org
Objet : Re: [PERFORM] copy and postgresql.conf



What version of Solaris are you using?

Do you have the recommendations while using COPY on Solaris?
http://blogs.sun.com/roller/page/jkshah?entry=postgresql_on_solaris_better_use

wal_sync_method = fsync
wal_buffers = 128
checkpoint_segments = 128
bgwriter_percent = 0
bgwriter_maxpages = 0


And also for /etc/system on Solaris 10, 9 SPARC use the following

set maxphys=1048576
set md:md_maxphys=1048576
set segmap_percent=50
set ufs:freebehind=0
set msgsys:msginfo_msgmni = 3584
set semsys:seminfo_semmni = 4096
set shmsys:shminfo_shmmax = 15392386252
set shmsys:shminfo_shmmni = 4096


Can you try putting in one run with this values and send back your
experiences on whether it helps your workload or not?

Atleast I saw improvements using the above settings with COPY with
Postgres 8.0 and Postgres 8.1 on Solaris.

Regards,
Jignesh




FERREIRA, William (VALTECH) wrote:

>30% faster !!! i will test this new version ...
>
>thanks a lot
>
>-----Message d'origine-----
>De : pgsql-performance-owner@postgresql.org
>[mailto:pgsql-performance-owner@postgresql.org]De la part de Albert
>Cervera Areny
>Envoyé : mardi 14 février 2006 17:07
>À : pgsql-performance@postgresql.org
>Objet : Re: [PERFORM] copy and postgresql.conf
>
>
>
>Sorry, COPY improvements came with 8.1
>
>(http://www.postgresql.org/docs/whatsnew)
>
>A Dimarts 14 Febrer 2006 14:26, FERREIRA, William (VALTECH) va escriure:
> 
>
>>thanks,
>>
>>i'm using postgresql 8.0.3
>>there is no primary key and no index on my tables
>>
>>regards
>>
>>-----Message d'origine-----
>>De : pgsql-performance-owner@postgresql.org
>>[mailto:pgsql-performance-owner@postgresql.org]De la part de Albert
>>Cervera Areny
>>Envoyé : mardi 14 février 2006 12:38
>>À : pgsql-performance@postgresql.org
>>Objet : Re: [PERFORM] copy and postgresql.conf
>>
>>
>>
>>Hi William,
>>    which PostgreSQL version are you using? Newer (8.0+) versions have some
>>
>>important performance improvements for the COPY command.
>>
>>    Also, you'll notice significant improvements by creating primary & foreign
>>
>>keys after the copy command. I think config tweaking can improve key and
>>
>>index creation but I don't think you can improve the COPY command itself.
>>
>>    There are also many threads in this list commenting on this issue, you'll
>>
>>find it easely in the archives.
>>
>>A Dimarts 14 Febrer 2006 10:44, FERREIRA, William (VALTECH) va escriure:
>>   
>>
>>>hi,
>>>
>>>i load data from files using copy method.
>>>Files contain between 2 and 7 millions of rows, spread on 5 tables.
>>>
>>>For loading all the data, it takes 40mn, and the same processing takes
>>>17mn with Oracle. I think that this time can be improved by changing
>>>postgresql configuration file. But which parameters i need to manipulate
>>>and with which values ?
>>>
>>>Here are the specifications of my system :
>>>V250 architecture sun4u
>>>2xCPU UltraSparc IIIi 1.28 GHz.
>>>8 Go RAM.
>>>
>>>Regards.
>>>
>>>    Will
>>>
>>>
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>>--
>>
>>Albert Cervera Areny
>>Dept. Informàtica Sedifa, S.L.
>>
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>--
>
>Albert Cervera Areny
>Dept. Informàtica Sedifa, S.L.
>
>Av. Can Bordoll, 149
>08202 - Sabadell (Barcelona)
>Tel. 93 715 51 11
>Fax. 93 715 51 12
>
>====================================================================
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