Обсуждение: Reg. Restore

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Reg. Restore

От
Venakata Ramana
Дата:
Hi,

I am using postgresql 9.1.5. on windows Xp. 

I am facing two problems: 

1. Restore of DB is very slow.
    How to improve the speed of Restore?

2. Without indexes, retrieving from table is fast?
    After creating an index on that table, then the retrieval become slow.

plz prove any solution

Thanks in advance

Regards

Ramana


Re: Reg. Restore

От
Matheus de Oliveira
Дата:



On Mon, Oct 7, 2013 at 9:03 AM, Venakata Ramana <ramana.pls@gmail.com> wrote:
Hi,

I am using postgresql 9.1.5. on windows Xp. 


You should update to 9.1.9.


I am facing two problems: 

1. Restore of DB is very slow.
    How to improve the speed of Restore?


How are you doing this restore? Is it from a dump? Are you using or could you use custom format?

At [1] there are some tips to help.


2. Without indexes, retrieving from table is fast?
    After creating an index on that table, then the retrieval become slow.


That is odd. Perhaps your indexes are bloat or you don't have proper statics on your tables?! Please, give us the EXPLAIN ANALYZE of the queries with and without the indexes (you could use [2]), and run ANALYZE on the table before it.


[1] http://www.postgresql.org/docs/9.1/static/populate.html
[2] http://explain.depesz.com/

Regards,
--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres

Re: Reg. Restore

От
Kevin Grittner
Дата:
Venakata Ramana <ramana.pls@gmail.com> wrote:

> I am using postgresql 9.1.5. on windows Xp.

You should update to a more current minor release.

http://www.postgresql.org/support/versioning/

> 1. Restore of DB is very slow.
>     How to improve the speed of Restore?

You need to provide more information on how you backed up, how you
are restoring, and what the bottleneck seems to be.

http://www.postgresql.org/docs/9.1/interactive/backup.html


> 2. Without indexes, retrieving from table is fast?
>     After creating an index on that table, then the retrieval
>     become slow.

There's not enough information to give much advice.  Please read
this page and start a new thread on the pgsql-performance list:

http://wiki.postgresql.org/wiki/SlowQueryQuestions

--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

Re: Reg. Restore

От
Matheus de Oliveira
Дата:


On Tue, Oct 8, 2013 at 2:43 AM, Venakata Ramana <ramana.pls@gmail.com> wrote:
Thanks for your reply.


---> You should update to 9.1.9.

Recently I updated to 9.1.5. I will do in near future.


Recently??? 9.1.5 was released more then one year ago... =/

--> How are you doing this restore? Is it from a dump? Are you using or could you use custom format?


I am pg_restore using for restoring the backup which created using pg_dump. 




If you don't show how you are doing that, nobody will be able to help you.

 

--> That is odd. Perhaps your indexes are bloat or you don't have proper statics on your tables?! Please, give us the EXPLAIN ANALYZE of the queries with and without the indexes (you could use [2]), and run ANALYZE on the table before it.


I used [2] option. 

With Index, and With out Index came in White Color.

In this nDl and Nqr are query Plans i pasted. Please go through that. 
Suggest me whether i am doing in correct way or not.


I'm not going there to search for your plans, you could help people to help you and pasted it here by yourself. Also, as Kevin suggested, this subject should be on another thread in performance list.

 




On Mon, Oct 7, 2013 at 11:04 PM, Matheus de Oliveira <matioli.matheus@gmail.com> wrote:



On Mon, Oct 7, 2013 at 9:03 AM, Venakata Ramana <ramana.pls@gmail.com> wrote:
Hi,

I am using postgresql 9.1.5. on windows Xp. 


You should update to 9.1.9.


I am facing two problems: 

1. Restore of DB is very slow.
    How to improve the speed of Restore?


How are you doing this restore? Is it from a dump? Are you using or could you use custom format?

At [1] there are some tips to help.


2. Without indexes, retrieving from table is fast?
    After creating an index on that table, then the retrieval become slow.


That is odd. Perhaps your indexes are bloat or you don't have proper statics on your tables?! Please, give us the EXPLAIN ANALYZE of the queries with and without the indexes (you could use [2]), and run ANALYZE on the table before it.


[1] http://www.postgresql.org/docs/9.1/static/populate.html
[2] http://explain.depesz.com/

Regards,
--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres





--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres

Re: Reg. Restore

От
Venakata Ramana
Дата:
Thanks for your reply.


---> You should update to 9.1.9.

Recently I updated to 9.1.5. I will do in near future.


--> How are you doing this restore? Is it from a dump? Are you using or could you use custom format?


I am pg_restore using for restoring the backup which created using pg_dump. 



--> That is odd. Perhaps your indexes are bloat or you don't have proper statics on your tables?! Please, give us the EXPLAIN ANALYZE of the queries with and without the indexes (you could use [2]), and run ANALYZE on the table before it.


I used [2] option. 

With Index, and With out Index came in White Color.

In this nDl and Nqr are query Plans i pasted. Please go through that. 
Suggest me whether i am doing in correct way or not.

Thanks in Advance.


Regards

Ramana



On Mon, Oct 7, 2013 at 11:04 PM, Matheus de Oliveira <matioli.matheus@gmail.com> wrote:



On Mon, Oct 7, 2013 at 9:03 AM, Venakata Ramana <ramana.pls@gmail.com> wrote:
Hi,

I am using postgresql 9.1.5. on windows Xp. 


You should update to 9.1.9.


I am facing two problems: 

1. Restore of DB is very slow.
    How to improve the speed of Restore?


How are you doing this restore? Is it from a dump? Are you using or could you use custom format?

At [1] there are some tips to help.


2. Without indexes, retrieving from table is fast?
    After creating an index on that table, then the retrieval become slow.


That is odd. Perhaps your indexes are bloat or you don't have proper statics on your tables?! Please, give us the EXPLAIN ANALYZE of the queries with and without the indexes (you could use [2]), and run ANALYZE on the table before it.


[1] http://www.postgresql.org/docs/9.1/static/populate.html
[2] http://explain.depesz.com/

Regards,
--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres


Re: Reg. Restore

От
Venakata Ramana
Дата:
Thanks for your reply.


---> You should update to a more current minor release.

Recently I updated to 9.1.5. I will do in near future.


--> You need to provide more information on how you backed up, how you
are restoring, and what the bottleneck seems to be.


I am pg_restore using for restoring the backup which created using pg_dump. 

Thanks in Advance

Regards

Ramana


On Mon, Oct 7, 2013 at 10:43 PM, Kevin Grittner <kgrittn@ymail.com> wrote:
Venakata Ramana <ramana.pls@gmail.com> wrote:

> I am using postgresql 9.1.5. on windows Xp.

You should update to a more current minor release.

http://www.postgresql.org/support/versioning/

> 1. Restore of DB is very slow.
>     How to improve the speed of Restore?

You need to provide more information on how you backed up, how you
are restoring, and what the bottleneck seems to be.

http://www.postgresql.org/docs/9.1/interactive/backup.html


> 2. Without indexes, retrieving from table is fast?
>     After creating an index on that table, then the retrieval
>     become slow.

There's not enough information to give much advice.  Please read
this page and start a new thread on the pgsql-performance list:

http://wiki.postgresql.org/wiki/SlowQueryQuestions

--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company